C++ is one of the most popular programming languages. It is based on C but is an object-oriented programming language. It is widely used in graphics libraries, games, network devices, etc.

//Program to find Factorial of a number by while looping

#include<iostream.h>

#include<conio.h>

#include<math.h>

 void main()

{clrscr();

 int num,fact=1;

 cout<<"\n Enter the number:";

 cin>>num;

 for(int i=1;i<=num;i++)

 {

  fact=fact*i;

 }

 cout<<"\n Factorial of "<<num<<"="<<fact;

 getch();

}

Learn C++ (Introduction and Tutorials to C++ Programming)

C++ is one of the most popular programming languages. It is based on C but is an object-oriented programming language. It is widely used in graphics libraries, games, network devices, etc.

//Program to find the positive number

#include<iostream.h>

#include<conio.h>

void main()

{clrscr();

int num,i,sum;

cout<<"\n enter the positive number:";

cin>> num;

i=1;

sum=0;

start:

sum=sum+i;

i++;

if(i<=num)

goto start;

cout<<sum;

getch();

}

Learn C++ (Introduction and Tutorials to C++ Programming)

C++ is a general-purpose programming language. It has imperative, object-oriented and generic programming features, while also providing facilities for low-level memory manipulation.

//Program to generate the Fibonacci series

#include<iostream.h>

#include<conio.h>

 void main()

 {clrscr();

 int x=0,y=1,z,n,i=3;

 cout<<"\n Enter The Number Of Term :";

 cin>>n;

 cout<<x<<" "<<y<<" ";

 do

 {z=x+y;

 cout<<z<<" ";

 x=y;

 i++;

 }while(i<=n);

 getch();

 }

Learn C++ (Introduction and Tutorials to C++ Programming)

//Program to find product of two matrices

#include<iostream.h>

#include<conio.h>

void main()

{

 clrscr();

 int A[10][10],B[10][10],C[10][10],m,n,p,q,i,k,j;

 cout<<"\n enter the size of first matrix :";

 cin>>m>>n;

 cout<<"\n enter the size of second matrix :";

 cin>>p>>q;

 if(n==p)

 {

  cout<<"\n product of two matrix is possible ";

  cout<<"\n enter the elements of first matrix ";

  {

   for(i=0;i<m;i++)

   for(j=0;j<n;j++)

   {

    cout<<"\n enter A["<<i<<"]["<<j<<"]";

    cin>>A[i][j];

   }

  }

  cout<<"\n enter the elements of second matrix";

  for(i=0;i<p;i++)

  {

   for(j=0;j<q;j++)

   {

    cout<<"\n enter B["<<i<<"]["<<j<<"]";

    cin>>B[i][j];

   }

  }

  cout<<"\n the first matrix is :";

  for(i=0;i<m;i++)

  {

   cout<<"\n";

   for(j=0;j<n;j++)

   cout<<A[i][j]<<" ";

  }

  cout<<"\n second matrix is:";

  for(i=0;i<p;i++)

  {

   cout<<"\n ";

   for(j=0;j<q;j++)

   cout<<B[i][j]<<" ";

  }

  for(i=0;i<m;i++)

  {

   for(j=0;j<q;j++)

    {

        C[i][j]=0;

     }

for(i=0;i<m;i++)

  for(j=0;j<q;j++)

      for(k=0;k<n;k++)

   {

    C[i][j]+=A[i][k]*B[k][j];

   } 

  }

  cout<<"\n the product of two matrix is :";

  for(i=0;i<m;i++)

  {

   cout<<"\n";

   for(j=0;j<q;j++)

   cout<<C[i][j]<<" ";

  }

 }

 else

 cout<<"\n multiplication is not possible:";

 getch();

}

//Program to find diagonal of matrix

#include<iostream.h>

#include<conio.h>

void main()

{clrscr();

int A[10][10],B[10][10],m,n,i,j;

cout<<"\n enter the no. of rows:";

cin>>m;

cout<<"\n enter no. of column:";

cin>>n;

for(i=0;i<m;i++)

{ for(j=0;j<n;j++)

 { cout<<"/n enter A["<<i<<"]["<<j<<"] element:";

 cin>>A[i][j];

 }

  }

   cout<<"/n the matrix is:";

   for(i=0;i<m;i++)

   { cout<<"\n";

  for(j=0;j<n;j++)

    cout<<A[i][j]<<" ";

    }

  cout<<"/n first diagonal is:\n";

  for(i=0;i<n;i++)

  { for(j=0;j<m;j++)

  { if(i==j)

 cout<<A[i][j]<<" ";

 }

  }

   cout<<"\n second diagonal is:";

   for(i=0;i<n;i++)

   { for(j=0;j<m;j++)

  { if(i+j==n-1)

  cout<<A[i][j]<<" ";

  }

   }

    int sum1=0,sum2=0;

    for(i=0;i<n;i++)

    { for(j=0;j<m;j++)

    { if(i==j)

      sum1+=A[i][j];

      if(i+j==n-i)

 sum2+=A[i][j];

 }

  }

  cout<<"\n sum of first diagonal element="<<sum1;

  cout<<"\n sum of second diagonal element="<<sum2;

   if(i==j)

   { cout<<A[i][j]<<" ";

   sum1+=A[i][j];

  }

  getch();

  }

C++ is one of the most popular programming languages. It is based on C but is an object-oriented programming language. It is widely used in graphics libraries, games, network devices, etc. C++ is a general-purpose programming language. It has imperative, object-oriented and generic programming features, while also providing facilities for low-level memory manipulation.

//Program to check whether the number is string or not

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

void main()

{clrscr();

char string[10];

int i;

cout<<"\n enter the string:";

 gets(string);

 for(i=0;string[i]!='\0';i++)

 {if(string[i]>=65 && string[i]<=92)

    string[i]=string[i]+32;

  string[i]=string[i];

  }

  cout<<"\n the converted string is:"<<string;

    getch();

   }

//Program to display the sum of each row elements

#include<iostream.h>

#include<conio.h>

#include <math.h>

void main()

{ clrscr();

 int P[10][10],m,n,i,j,sum1=0;

 cout<<"\n enter the no of rows for P:";

 cin>>m;

 cout<<"\n enter the no of columns for P:";

 cin>>n;

 for(i=0;i<m;i++)

 {

  for(j=0;j<n;j++)

  {

   cout<<"\n enter P["<<i<<"]["<<j<<"] elements:";

   cin>>P[i][j];

  }

 }

cout<<"\n the matrix P is:";

for (i=0;i<m; i++)

{cout<<"\n";

for(j=0; j<n; j++)

cout<<P[i][j]<<" ";

}

for(i=0;i<m; i++)

{sum1=0;

for(j=0; j<n; j++)

sum1+=P[i][j];

cout<<"\n Sum of row"<<i+1<<"="<<sum1;

}

getch();

}