Pascal triangle

    #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;  
    }