C :- Star Programs

1.Print Pascal's triangle.

           1
         1   1
       1   2   1
     1   3   3    1
   1  4    6   4   1
 1  5   10   10  5   1 
#include<Stdio.h>

void main()
{
	int rows, coef = 1, space, i, j;
	printf("Enter number of rows: ");
        scanf("%d",&rows);
        for(i=0; i<rows; i++)
            {
                for(space=1; space <= rows-i; space++)
    	        {
    	 	        printf("  ");
		}
		for(j=0; j <= i; j++)
                {
                    if (j==0 || i==0)
                        coef = 1;
                    else
                        coef = coef*(i-j+1)/j;

                    printf("%4d", coef);
                }
        printf("\n");

            }
}