write a c Program for Factorial of a Number using Recursive Function.

#include<stdio.h>
#include<conio.h>
  long int factorial(int n);
  void main()
{
  int n;
  clrscr();
  printf("\n Enter the number");
  scanf("\n %d",&n);
  printf("\n Factorial of %d is %ld",n,factorial(n));
  getch();
}
  long int factorial(int n)
{
  if(n<=1)
{
  return(01);
}
  else
{
  n=n*factorial(n-1);
  return(n);
}
}

output:-
Enter the number n=5
Factorial of 5 = 120

Write a c program to find even and odd numbers.

#include<stdio.h>
#include<conio.h>
  main()
{
  int num;
  clrscr();
  printf("\n enter the number num");
  scanf("\n %d",&num);
  if(num%2==0)
{
  printf("\n num is even %d",num);
}
  else
{
  printf("\n num is odd %d",num);
}
  return (0);
}
output:-
enter the number =103
odd number


http://www.youtube.com/watch?v=AMUpCyRpkJw&feature=context-gau

Write a C program to subtract of two matrix.

#include<stdio.h>
#include<conio.h>
#include<math.h>
  main()
{
  int a[n][m],b[n][m],c[n][m];
  int i,j;
  clrscr();
  printf("\n enter the values of n and m");
  scanf("\n %d%d",&n,&m);
  printf("\n enter the element of matrix a");
  for(i=0;i<n;i++)
{
  for(j=0;j<m;j++)
{
  scanf("\n %d",a[i][j]);
}
}
  printf("\n enter the values of matrix b");
{
  for(i=0;i<n;i++)
{
  for(j=0;j<m;j++)
{
  scanf(\n %d",b[i][j]);
}
}
  for(i=0;i<n;i++)
{
  for(j=0;j<m;j++)
{
  c[i][j]=a[i][j]-b[i][j];

  printf("\n %d",c[i][j]);

}
}
  return (0);
}


output:-
  enter the row and column of matrix a={2*2}

  enter the row and column of matrix b={2*2}

  enter the element of first matrix a={0,2,4,5}
  enter the element of first matrix b={0,6,4,5}

  matrix c={0,-4,0,0}

Write a c program to find the area and circumference of circle.

#include<stdio.h>
#include<conio.h>
#include<math.h>
  main()
{
  int r;
  float pi=3.142,area,cir;
  clrscr();
  printf("\n enter the value of r");
  scanf("\n %d",&r);
  cir=2*pi*r;
  area=pi*r*r;
  printf(" the circumference of the circle is %f",cir);
  printf(" the area of the circle is %f",area);
}

output:-
 enter the value of r=1
 circumference (cir)=6.28400
 area of circle =3.14200

Write a C program for simple interest calculation

#include<stdio.h>
#include<conio.h>
#include<math.h>
  main()
{
  int p,r,t;
  float x;
  clrscr();
  printf("\n enter the values of p,r and t");
  scanf("\n %d%d%d",&p,&r,&t);
  x=((p*r*t)/100;
  printf("\n x=%f",x);
  return(0);
}

output:-
 enter the value of p=100
 enter the value of r=10
 enter the value of t=2
 x=20.000

Write a c programme for addition of two matrix.

#include<stdio.h>
#include<conio.h>
#include<math.h>
  main()
{
  int a[n][m],b[n][m],c[n][m];
  int i,j;
  clrscr();
  printf("\n enter the values of n and m");
  scanf("\n %d%d",&n,&m);
  printf("\n enter the element of matrix a");
  for(i=0;i<n;i++)
{
  for(j=0;j<m;j++)
{
  scanf("\n %d",a[i][j]);
}
}
  printf("\n enter the values of matrix b");
{
  for(i=0;i<n;i++)
{
  for(j=0;j<m;j++)
{
  scanf(\n %d",b[i][j]);
}
}
  for(i=0;i<n;i++)
{
  for(j=0;j<m;j++)
{
  c[i][j]=a[i][j]+b[i][j];
  printf("\n %d",c[i][j]);
}
}
  return (0);
}

output:-
 enter the values of n=2
 enter the values of m=2
 enter the element of matrix a[]={1,2,3,4}
 enter the element of matrix b[]={1,2,3,4}
 matrix c[]={2,4,6,8}