C++ Basic Example for student and Programmer

C++ Applications

1. Test No. is Prime or Not Prime.

<span class="com">#embody</span><span class="str"><iostream.h></iostream.h></span><span class="com">#embody</span><span class="str"><conio.h></conio.h></span><span class="kwd">void</span><span class="pln"> foremost</span><span class="pun">()</span><span class="pun">{</span>  <span class="kwd">int</span><span class="pln"> i</span><span class="pun">,</span><span class="kwd">no</span><span class="pun">;</span><span class="pln">  clrscr</span><span class="pun">();</span><span class="pln">  cout</span><span class="pun"><<</span><span class="str">"Enter any num: "</span><span class="pun">;</span><span class="pln">  cin</span><span class="pun">>></span><span class="kwd">no</span><span class="pun">;</span>  <span class="kwd">if</span><span class="pun">(</span><span class="kwd">no</span><span class="pun">==</span><span class="lit">1</span><span class="pun">)</span>  <span class="pun">{</span><span class="pln">  cout</span><span class="pun"><<</span><span class="str">"Smallest prime num is 2"</span><span class="pun">;</span>  <span class="pun">}</span>  <span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="lit">2</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="kwd">no</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++)</span>  <span class="pun">{</span>  <span class="kwd">if</span><span class="pun">(</span><span class="kwd">no</span><span class="pun">%</span><span class="pln">i</span><span class="pun">==</span><span class="lit">0</span><span class="pun">)</span>  <span class="pun">{</span><span class="pln">  cout</span><span class="pun"><<</span><span class="str">"Not prime num"</span><span class="pun">;</span>  <span class="kwd">break</span><span class="pun">;</span>  <span class="pun">}</span>  <span class="pun">}</span> <span class="kwd">if</span><span class="pun">(</span><span class="kwd">no</span><span class="pun">==</span><span class="pln">i</span><span class="pun">)</span> <span class="pun">{</span><span class="pln"> cout</span><span class="pun"><<</span><span class="str">"Prime num"</span><span class="pun">;</span> <span class="pun">}</span><span class="pln">  getch</span><span class="pun">();</span><span class="pun">}</span>

#embody<iostream.h></iostream.h>#embody<conio.h></conio.h>void foremost(){ int i,no; clrscr(); cout<<"Enter any num: "; cin>>no; if(no==1) { cout<<"Smallest prime num is 2"; } for(i=2;i<no;i++) { if(no%i==0) { cout<<"Not prime num"; break; } } if(no==i) { cout<<"Prime num"; } getch();}

Enter any num: 10Not Prime Num

1	Enter any num: 10Not Prime Num

2. Print subsequent Prime quantity.

Once we enter any quantity this code will print subsequent Prime quantity.
Instance: Suppose we enter 5 then subsequent prime quantity is 7.

Instance

<span class="com">#embody</span><span class="str"><iostream.h></iostream.h></span><span class="com">#embody</span><span class="str"><conio.h></conio.h></span><span class="kwd">void</span><span class="pln"> foremost</span><span class="pun">()</span><span class="pun">{</span>  <span class="kwd">int</span><span class="pln"> i</span><span class="pun">,</span><span class="pln">j</span><span class="pun">=</span><span class="lit">2</span><span class="pun">,</span><span class="pln">num</span><span class="pun">;</span><span class="pln">  clrscr</span><span class="pun">();</span><span class="pln">  cout</span><span class="pun"><<</span><span class="str">"Enter any num: "</span><span class="pun">;</span><span class="pln">  cin</span><span class="pun">>></span><span class="pln">num</span><span class="pun">;</span><span class="pln">  cout</span><span class="pun"><<</span><span class="str">"Subsequent prime num: "</span><span class="pun">;</span>  <span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="pln">num</span><span class="pun">+</span><span class="lit">1</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3000</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++)</span> <span class="pun">{</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">j</span><span class="pun">=</span><span class="lit">2</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="pln">i</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++)</span>  <span class="pun">{</span> <span class="kwd">if</span><span class="pun">(</span><span class="pln">i </span><span class="pun">%</span><span class="pln">j</span><span class="pun">==</span><span class="lit">0</span><span class="pun">)</span> <span class="pun">{</span> <span class="kwd">break</span><span class="pun">;</span>  <span class="pun">}</span> <span class="com">// if</span> <span class="pun">}</span> <span class="com">// for</span> <span class="kwd">if</span><span class="pun">(</span><span class="pln">i</span><span class="pun">==</span><span class="pln">j </span><span class="pun">||</span><span class="pln"> i</span><span class="pun">==</span><span class="lit">1</span><span class="pun">)</span> <span class="pun">{</span><span class="pln"> cout</span><span class="pun"><<</span><span class="str">"t"</span><span class="pun"><<</span><span class="pln">i</span><span class="pun">;</span><span class="kwd">break</span><span class="pun">;</span><span class="pun">}</span> <span class="com">// if</span><span class="pun">}</span>  <span class="com">// outer for</span><span class="pln">getch</span><span class="pun">();</span><span class="pun">}</span>

#embody<iostream.h></iostream.h>#embody<conio.h></conio.h>void foremost(){ int i,j=2,num; clrscr(); cout<<"Enter any num: "; cin>>num; cout<<"Subsequent prime num: "; for(i=num+1;i<3000;i++) {for(j=2;j<i;j++) { if(i %j==0) { break; } // if } // for if(i==j || i==1) { cout<<"t"<<i;break;} // if} // outer forgetch();}

Output

Enter any num: 10Subsequent prime num 11

1	Enter any num: 10Subsequent prime num 11

3. Fibonaccci Collection in C++ with out Recursion.

Instance

<span class="com">#embody</span> <span class="str"><iostream></iostream></span><span class="kwd">utilizing</span> <span class="kwd">namespace</span><span class="pln"> std</span><span class="pun">;</span><span class="kwd">int</span><span class="pln"> foremost</span><span class="pun">()</span> <span class="pun">{</span>  <span class="kwd">int</span><span class="pln"> n1</span><span class="pun">=</span><span class="lit">0</span><span class="pun">,</span><span class="pln">n2</span><span class="pun">=</span><span class="lit">1</span><span class="pun">,</span><span class="pln">n3</span><span class="pun">,</span><span class="pln">i</span><span class="pun">,</span><span class="pln">quantity</span><span class="pun">;</span><span class="pln"> cout</span><span class="pun"><<</span><span class="str">"Enter the variety of components: "</span><span class="pun">;</span><span class="pln"> cin</span><span class="pun">>></span><span class="pln">quantity</span><span class="pun">;</span><span class="pln"> cout</span><span class="pun"><<</span><span class="pln">n1</span><span class="pun"><<</span><span class="str">" "</span><span class="pun"><<</span><span class="pln">n2</span><span class="pun"><<</span><span class="str">" "</span><span class="pun">;</span> <span class="com">//printing Zero and 1  </span> <span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="lit">2</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="pln">quantity</span><span class="pun">;++</span><span class="pln">i</span><span class="pun">)</span> <span class="com">//loop begins from 2 as a result of Zero and 1 are already printed  </span> <span class="pun">{</span><span class="pln">n3</span><span class="pun">=</span><span class="pln">n1</span><span class="pun">+</span><span class="pln">n2</span><span class="pun">;</span><span class="pln">cout</span><span class="pun"><<</span><span class="pln">n3</span><span class="pun"><<</span><span class="str">" "</span><span class="pun">;</span><span class="pln">n1</span><span class="pun">=</span><span class="pln">n2</span><span class="pun">;</span><span class="pln">n2</span><span class="pun">=
</span><span class="pln">n3</span><span class="pun">;</span> <span class="pun">}</span> <span class="kwd">return</span> <span class="lit">0</span><span class="pun">;</span> <span class="pun">}</span>

#embody <iostream></iostream>utilizing namespace std;int foremost() { int n1=0,n2=1,n3,i,quantity; cout<<"Enter the variety of components: "; cin>>quantity; cout<<n1<<" "<<n2<<" "; //printing Zero and 1 for(i=2;i<quantity;++i) //loop begins from 2 as a result of Zero and 1 are already printed {n3=n1+n2;cout<<n3<<" ";n1=n2;n2=

n3; } return 0; }

Output

Enter the variety of components: 100 1 1 2 3 5 8 13 21 34

1	Enter the variety of components: 100 1 1 2 3 5 8 13 21 34

4. Fibonnaci sequence utilizing recursion in C++.

Instance

<span class="com">#embody</span><span class="str"><iostream></iostream></span>  <span class="kwd">utilizing</span> <span class="kwd">namespace</span><span class="pln"> std</span><span class="pun">;</span><span class="kwd">void</span><span class="pln"> printFibonacci</span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> n</span><span class="pun">){</span>  <span class="kwd">static</span> <span class="kwd">int</span><span class="pln"> n1</span><span class="pun">=</span><span class="lit">0</span><span class="pun">,</span><span class="pln"> n2</span><span class="pun">=</span><span class="lit">1</span><span class="pun">,</span><span class="pln"> n3</span><span class="pun">;</span>  <span class="kwd">if</span><span class="pun">(</span><span class="pln">n</span><span class="pun">></span><span class="lit">0</span><span class="pun">){</span><span class="pln"> n3 </span><span class="pun">=</span><span class="pln"> n1 </span><span class="pun">+</span><span class="pln"> n2</span><span class="pun">;</span><span class="pln"> n1 </span><span class="pun">=</span><span class="pln"> n2</span><span class="pun">;</span><span class="pln"> n2 </span><span class="pun">=</span><span class="pln"> n3</span><span class="pun">;</span><span class="pln"> cout</span><span class="pun"><<</span><span class="pln">n3</span><span class="pun"><<</span><span class="str">" "</span><span class="pun">;</span><span class="pln"> printFibonacci</span><span class="pun">(</span><span class="pln">n</span><span class="pun">-</span><span class="lit">1</span><span class="pun">);</span>  <span class="pun">}</span>  <span class="pun">}</span>  <span class="kwd">int</span><span class="pln"> foremost</span><span class="pun">(){</span>  <span class="kwd">int</span><span class="pln"> n</span><span class="pun">;</span><span class="pln">  cout</span><span class="pun"><<</span><span class="str">"Enter the variety of components: "</span><span class="pun">;</span><span class="pln">  cin</span><span class="pun">>></span><span class="pln">n</span><span class="pun">;</span><span class="pln">  cout</span><span class="pun"><<</span><span class="str">"Fibonacci Collection: "</span><span class="pun">;</span><span class="pln">  cout</span><span class="pun"><<</span><span class="str">"0 "</span><span class="pun"><<</span><span class="str">"1 "</span><span class="pun">;</span><span class="pln">printFibonacci</span><span class="pun">(</span><span class="pln">n</span><span class="pun">-</span><span class="lit">2</span><span class="pun">);</span>  <span class="com">//n-2 as a result of 2 numbers are already printed  </span> <span class="kwd">return</span> <span class="lit">0</span><span class="pun">;</span><span class="pun">}</span>

#embody<iostream></iostream> utilizing namespace std;void printFibonacci(int n){ static int n1=0, n2=1, n3; if(n>0){ n3 = n1 + n2; n1 = n2; n2 = n3; cout<<n3<<" "; printFibonacci(n-1); } } int foremost(){ int n; cout<<"Enter the variety of components: "; cin>>n; cout<<"Fibonacci Collection: "; cout<<"0 "<<"1 ";printFibonacci(n-2); //n-2 as a result of 2 numbers are already printed return 0;}

Output

Enter the variety of components: 15  Fibonacci Collection: 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377

1	Enter the variety of components: 15 Fibonacci Collection: 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377

4. Reverse a String in C++.

Instance

<span class="com">#embody</span><span class="str"><iostream.h></iostream.h></span><span class="com">#embody</span><span class="str"><stdio.h></stdio.h></span><span class="com">#embody</span><span class="str"><conio.h></conio.h></span><span class="com">#embody</span><span class="str"><string.h></string.h></span><span class="kwd">void</span><span class="pln"> foremost</span><span class="pun">()</span><span class="pun">{</span> <span class="kwd">char</span><span class="pln"> str</span><span class="pun">[</span><span class="lit">100</span><span class="pun">],</span><span class="pln">temp</span><span class="pun">;</span> <span class="kwd">int</span><span class="pln"> i</span><span class="pun">,</span><span class="pln">j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln"> clrscr</span><span class="pun">();</span><span class="pln"> cout</span><span class="pun"><<</span><span class="str">"Enter any the string :"</span><span class="pun">;</span><span class="pln"> will get</span><span class="pun">(</span><span class="pln">str</span><span class="pun">);</span>  <span class="com">//  will get operate for enter string</span><span class="pln"> i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln"> j</span><span class="pun">=</span><span class="pln">strlen</span><span class="pun">(</span><span class="pln">str</span><span class="pun">)-</span><span class="lit">1</span><span class="pun">;</span>  <span class="kwd">whereas</span><span class="pun">(</span><span class="pln">i</span><span class="pun"><</span><span class="pln">j</span><span class="pun">)</span> <span class="pun">{</span><span class="pln"> temp</span><span class="pun">=</span><span class="pln">str</span><span class="pun">[</span><span class="pln">i</span><span class="pun">];</span><span class="pln"> str</span><span class="pun">[</span><span class="pln">i</span><span class="pun">]=</span><span class="pln">str</span><span class="pun">[</span><span class="pln">j</span><span class="pun">];</span><span class="pln"> str</span><span class="pun">[</span><span class="pln">j</span><span class="pun">]=</span><span class="pln">temp</span><span class="pun">;</span><span class="pln"> i</span><span class="pun">++;</span><span class="pln"> j</span><span class="pun">--;</span> <span class="pun">}</span><span class="pln"> cout</span><span class="pun"><<</span><span class="str">"Reverse string is: "</span><span class="pun"><<</span><span class="pln">str</span><span class="pun">;</span><span class="pln"> getch</span><span class="pun">();</span><span class="pun">}</span>

#embody<iostream.h></iostream.h>#embody<stdio.h></stdio.h>#embody<conio.h></conio.h>#embody<string.h></string.h>void foremost(){ char str[100],temp; int i,j=0; clrscr(); cout<<"Enter any the string :"; will get(str); // will get operate for enter string i=0; j=strlen(str)-1; whereas(i<j) { temp=str[i]; str[i]=str[j]; str[j]=temp; i++; j--; } cout<<"Reverse string is: "<<str; getch();}

Output

Enter any the string  : hiteshReverse string is : hsetih

1	Enter any the string : hiteshReverse string is : hsetih

5. Matrix Program in C++.

Addition of two matrix in c++

<span class="com">#embody</span><span class="str"><iostream.h></iostream.h></span><span class="com">#embody</span><span class="str"><conio.h></conio.h></span><span class="kwd">void</span><span class="pln"> foremost</span><span class="pun">()</span><span class="pun">{</span><span class="kwd">int</span><span class="pln"> x</span><span class="pun">[</span><span class="lit">3</span><span class="pun">][</span><span class="lit">3</span><span class="pun">],</span><span class="pln">y</span><span class="pun">[</span><span class="lit">3</span><span class="pun">][</span><span class="lit">3</span><span class="pun">],</span><span class="pln">z</span><span class="pun">[</span><span class="lit">3</span><span class="pun">][</span><span class="lit">3</span><span class="pun">],</span><span class="pln">i</span><span class="pun">,</span><span class="pln">j</span><span class="pun">;</span><span class="pln">clrscr</span><span class="pun">();</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"ENTER ELEMENTS OF 1st MATRIXn"</span><span class="pun">;</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++)</span><span class="pun">{</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="lit">
3</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++)</span><span class="pln">cin</span><span class="pun">>></span><span class="pln">x</span><span class="pun">[</span><span class="pln">i</span><span class="pun">][</span><span class="pln">j</span><span class="pun">];</span><span class="pun">}</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"ENTER ELEMENTS OF 2nd MATRIXn"</span><span class="pun">;</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++)</span><span class="pun">{</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++)</span><span class="pln">cin</span><span class="pun">>></span><span class="pln">y</span><span class="pun">[</span><span class="pln">i</span><span class="pun">][</span><span class="pln">j</span><span class="pun">];</span><span class="pun">}</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"MATRIX [X]"</span><span class="pun">;</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++)</span><span class="pun">{</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"nn"</span><span class="pun">;</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++)</span><span class="pln">cout</span><span class="pun"><<</span><span class="pln">x</span><span class="pun">[</span><span class="pln">i</span><span class="pun">][</span><span class="pln">j</span><span class="pun">];</span><span class="pun">}</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"nMATRIX [Y]"</span><span class="pun">;</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++)</span><span class="pun">{</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"nn"</span><span class="pun">;</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++)</span><span class="pln">cout</span><span class="pun"><<</span><span class="pln">y</span><span class="pun">[</span><span class="pln">i</span><span class="pun">][</span><span class="pln">j</span><span class="pun">];</span><span class="pun">}</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++)</span><span class="pun">{</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++)</span><span class="pln">z</span><span class="pun">[</span><span class="pln">i</span><span class="pun">][</span><span class="pln">j</span><span class="pun">]=</span><span class="pln">x</span><span class="pun">[</span><span class="pln">i</span><span class="pun">][</span><span class="pln">j</span><span class="pun">]+</span><span class="pln">y</span><span class="pun">[</span><span class="pln">i</span><span class="pun">][</span><span class="pln">j</span><span class="pun">];</span><span class="pun">}</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"nMATRIX [Z]"</span><span class="pun">;</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++)</span><span class="pun">{</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"nn"</span><span class="pun">;</span><span class="kwd">for</span><span class="pun">(</span><span class="pln">j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++)</span><span class="pln">cout</span><span class="pun"><<</span><span class="pln">z</span><span class="pun">[</span><span class="pln">i</span><span class="pun">][</span><span class="pln">j</span><span class="pun">];</span><span class="pun">}</span><span class="pln">getch</span><span class="pun">();</span><span class="pun">}</span>

3;j++)cin>>x[i][j];}cout<<"ENTER ELEMENTS OF 2nd MATRIXn";for(i=0;i<3;i++){for(j=0;j<3;j++)cin>>y[i][j];}cout<<"MATRIX [X]";for(i=0;i<3;i++){cout<<"nn";for(j=0;j<3;j++)cout<<x[i][j];}cout<<"nMATRIX [Y]";for(i=0;i<3;i++){cout<<"nn";for(j=0;j<3;j++)cout<<y[i][j];}for(i=0;i<3;i++){for(j=0;j<3;j++)z[i][j]=x[i][j]+y[i][j];}cout<<"nMATRIX [Z]";for(i=0;i<3;i++){cout<<"nn";for(j=0;j<3;j++)cout<<z[i][j];}getch();}

Output

6. Swap two numbers utilizing third variables.

Instance

<span class="com">#embody</span><span class="str"><iostream.h></iostream.h></span><span class="com">#embody</span><span class="str"><conio.h></conio.h></span><span class="kwd">void</span><span class="pln"> foremost</span><span class="pun">()</span><span class="pun">{</span><span class="kwd">int</span><span class="pln"> a</span><span class="pun">,</span><span class="pln">b</span><span class="pun">,</span><span class="pln">c</span><span class="pun">;</span><span class="pln">clrscr</span><span class="pun">();</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"Enter worth of a: "</span><span class="pun">;</span><span class="pln">cin</span><span class="pun">>></span><span class="pln">a</span><span class="pun">;</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"Enter worth of b: "</span><span class="pun">;</span><span class="pln">cin</span><span class="pun">>></span><span class="pln">b</span><span class="pun">;</span><span class="pln">c</span><span class="pun">=</span><span class="pln">a</span><span class="pun">;</span><span class="pln">a</span><span class="pun">=</span><span class="pln">b</span><span class="pun">;</span><span class="pln">b</span><span class="pun">=</span><span class="pln">c</span><span class="pun">;</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"After swap a: "</span><span class="pun"><<</span><span class="pln">a</span><span class="pun"><<</span><span class="str">"b: "</span>
<span class="pun"><<</span><span class="pln">b</span><span class="pun">;</span><span class="pln">getch</span><span class="pun">();</span><span class="pun">}</span>

<<b;getch();}

Output

Enter worth of a: 10Enter worth of b: 20After swap a: 20 b: 10

1	Enter worth of a: 10Enter worth of b: 20After swap a: 20 b: 10

7. Swap two numbers with out utilizing third variable.

Instance

<span class="com">#embody</span><span class="str"><iostream.h></iostream.h></span><span class="com">#embody</span><span class="str"><conio.h></conio.h></span><span class="kwd">void</span><span class="pln"> foremost</span><span class="pun">()</span><span class="pun">{</span><span class="kwd">int</span><span class="pln"> a</span><span class="pun">,</span><span class="pln">b</span><span class="pun">;</span><span class="pln">clrscr</span><span class="pun">();</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"Enter worth of a: "</span><span class="pun">;</span><span class="pln">cin</span><span class="pun">>></span><span class="pln">a</span><span class="pun">;</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"Enter worth of b: "</span><span class="pun">;</span><span class="pln">cin</span><span class="pun">>></span><span class="pln">b</span><span class="pun">;</span><span class="pln">a</span><span class="pun">=</span><span class="pln">a</span><span class="pun">+</span><span class="pln">b</span><span class="pun">;</span><span class="pln">b</span><span class="pun">=</span><span class="pln">a</span><span class="pun">-</span><span class="pln">b</span><span class="pun">;</span><span class="pln">a</span><span class="pun">=</span><span class="pln">a</span><span class="pun">-</span><span class="pln">b</span><span class="pun">;</span><span class="pln">cout</span><span class="pun"><<</span><span class="str">"After swap a: "</span><span class="pun"><<</span><span class="pln">a</span><span class="pun"><<</span><span class="str">"b: "</span><span class="pun"><<</span><span class="pln">b</span><span class="pun">;</span><span class="pln">getch</span><span class="pun">();</span><span class="pun">}</span>

Output

Enter worth of a: 10Enter worth of b: 20After swap a: 20 b: 10

1	Enter worth of a: 10Enter worth of b: 20After swap a: 20 b: 10

8. Examine two strings in C++.

Instance

<span class="com">#embody</span><span class="str"><iostream.h></iostream.h></span><span class="com">#embody</span><span class="str"><stdio.h></stdio.h></span><span class="com">#embody</span><span class="str"><conio.h></conio.h></span><span class="kwd">void</span><span class="pln"> foremost</span><span class="pun">()</span> <span class="pun">{</span> <span class="kwd">char</span><span class="pln"> str1</span><span class="pun">[</span><span class="lit">20</span><span class="pun">],</span><span class="pln">str2</span><span class="pun">[</span><span class="lit">20</span><span class="pun">],</span><span class="pln">i</span><span class="pun">,</span><span class="pln">j</span><span class="pun">,</span><span class="pln">flag</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln"> clrscr</span><span class="pun">();</span><span class="pln"> cout</span><span class="pun"><<</span><span class="str">"Enter first string: "</span><span class="pun">;</span><span class="pln"> will get</span><span class="pun">(</span><span class="pln">str1</span><span class="pun">);</span><span class="pln"> cout</span><span class="pun"><<</span><span class="str">"Enter Second string: "</span><span class="pun">;</span><span class="pln"> will get</span><span class="pun">(</span><span class="pln">str2</span><span class="pun">);</span><span class="pln"> i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln"> j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span>  <span class="kwd">whereas</span><span class="pun">(</span><span class="pln">str1</span><span class="pun">[</span><span class="pln">i</span><span class="pun">]!=</span><span class="str">'