19.To print pascal triangle

   1         

  1 1

 1 2 1

1 3 3 1

#include <stdio.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 );

}