Pascal Triangles

#include<stdio.h>
 long fact(int);
 main()
{
   int i, n, c;
    printf("Enter the number of rows :\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 ",fact(i)/(fact(c)*fact(i-c)));
       printf("\n");
   }
    return 0;
}

 long fact(int n)
{
   int c;
   long result = 1;
    for( c = 1 ; c <= n ; c++ )
         result = result*c;

   return ( result );
}