c++ ile faktöriyel aldırmak

#include<stdio.h>
#include<conio.h>
int s1,s2,fark;
main()
{
clrscr();
printf(“1. sayy gir”);
scanf(“%d”,&s1);
printf(“2. sayy gir”);
scanf(“%d”,&s2);
while(s1!=s2)
{
fark=s1-s2;
if (fark==5) printf(“fark 5 \n”);
printf(“say gir”);
s1=s2;
scanf(“%d”,&s2);
}
}