complete code that can perform simplest mathematical operations

////////mathematical operations/////////

#include "stdafx.h"

#include "stdio.h";

#include "conio.h"

#include "iostream"

using namespace std;

int _tmain(int argc, _TCHAR* argv[])

{

       int n1,n2,n3;      // any 3 random numbers

       int sum;    

       int sub;          // subtraction

       int mul;         // multiplication

       float div;      // division

       int mod;       // modulus

       cout<<"Enter n1,n2,n3";

       cin>>n1>>n2>>n3;

       sum=n1+n2+n3;

       sub=n1-n2-n3;

       mul=n1*n2*n3;

       div=n1/n2/n3;

       mod=n1%n2%n3;

       cout<<n1<<"+"<<n2<<"+"<<n3<<"="<<sum<<"\n";

       cout<<n1<<"-"<<n2<<"-"<<n3<<"="<<sub<<"\n";

       cout<<n1<<"*"<<n2<<"*"<<n3<<"="<<mul<<"\n";

       cout<<n1<<"/"<<n2<<"/"<<n3<<"="<<div<<"\n";

       cout<<n1<<"%"<<n2<<"%"<<n3<<"="<<mod<<"\n";

       getch();

}