C Program to check strong numbers...

//example for strong number..145! is strong number i.e 1!*4!*5!=1*24*120=145!
#include<stdio.h>
int fact(int n)
{
 if(n==0)
   return 1;
 else
  return n*fact(n-1);
}
void main()
{
printf("enter number:");
scanf("%d",&n);
while(n>0)
{
dig=n%10;
n=n/10;
sum=sum+fact(n);
}
if(sum==n)
  printf("%d is strong number",n);
else
  printf("%d is not strong number",n);
}

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