C program to print Pascal triangle

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#include <stdio.h>
#include<conio.h>

long factorial(int);

int main()
{
   int i, n, c;

   printf("Enter the number of rows you wish to see in pascal triangle\n");
   scanf("%d",&n);


   for ( i = 0 ; i < n ; i++ )
   {
      for ( c = 0 ; c <= ( n - i - 2 ) ; c++ )
         printf(" ");

      for( c = 0 ; c <= i ; c++ )
         printf("%ld ",factorial(i)/(factorial(c)*factorial(i-c)));

      printf("\n");
   }

   return 0;
}

long factorial(int n)
{
   int c;
   long result = 1;

   for( c = 1 ; c <= n ; c++ )
         result = result*c;

   return ( result );
}


Note:
You need a compiler to compile and execute this code.