Program to calculate Factorial and Square using Pointer

Hello here is a C program to Calculate the factorial and the square of the give number using Call by reference function.

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#include<stdio.h> int ffact(int *); int sqr(int *); void main() { int a,fact; printf("Enter the number:- "); scanf("%d",&a); fact=ffact(&a); printf("Factorial of the given number is %d\n",fact); fact=sqr(&a); printf("Square of that number is %d",fact); } int ffact(int *p) { int i,fact=1; if(*p == 0) return 1; else for (i=1;i<=*p;i++) { fact=i*fact; } return (fact); } int sqr(int *p) { int a; a = *p * *p; return (a); }

And after code here is nothing I think I need to describe about.