I have written this code in C++, and its running fine in Bloodshed DEV C++ and code::blocks. Then why am i getting compilation error whenever i submit it? Please help.

#include<iostream>
#include<conio.h>
using namespace std;
int main()
{
    int n,j=0,i,m,r;
    long long fact=1;
    char space,c;
    n=getch();
    n=n-48;
    cout<<n;
    space=getche();
    c=getche();

    while(c=='!')
    {
                 c=getche();
                      j++;
    }
    cout<<endl;
    if(n%j==0)
    {
              i=0;
              m=n;
              while(m>=j)
              {
                                 fact=fact*m;
                                 i++;
                                 m=(n-(i*j));
              }
    }
    else
    {
        i=0;
        m=n;
        r=n%j;
              while(m>=r)
              {
                                 fact=fact*m;
                                 i++;
                                 m=(n-(i*j));
              }
    }
    cout<<fact<<"\n";
    system("pause");
    return 0;
}

Thanks in advance.

Regards,
Shalini Sah