Arithmetic operator problem solution in C++

Arithmetic operator problem solution in C++ 

#include<iostream>

#include<conio.h>

using namespace std;

int main()

{

 int num1=10,num2=20;

 int sum =num1+num2;

 cout<<"sum is: "<<sum;

 cout<<endl;

int sub=num1-num2;

 cout<<"sub is: "<<sub;

 cout<<endl;

 int mul=num1*num2;

 cout<<"mul is: "<<mul;

 cout<<endl;

 double div=(float) num1/num2;

 cout<<"div is: "<<div;

 cout<<endl;

getch();

}