我找不出，大家帮忙看看错在哪里，程序运行总报错

//使用dev-cpp
#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int p,q,r;
    long long h,s,g;
    //1=1/p+1/q+1/r+1/s
    for(p=1;p<=1000;p++)
    {
        for(q=1;q<=1000;q++)
        {
            for(r=1;r<=1000;r++)
            {
                if((p!=q)&&(p!=r)&&(q!=r))
                {
                h=p*q*r-q*r-p*r-p*q;g=p*q*r;
                if((g%h==0)&&(h!=0))
                {
                    s=g/h;
                    cout<<p<<"---"<<q<<"---"<<r<<"---"<<s<<endl;
                }   
                }
               
            }
        }
    }
   
    cout<<endl;
    system("pause");
    return 0;
}