A Simple Calculator Doing All Functions At A Time

write a programme of calculator using classes in c++.

CALCULATOR
#include

using namespace std;

class calculator
{
public:
int num1;
int num2;

int add(int n1 ,int n2)
{
num1= n1;
num2= n2;
return num1+num2;
}
int sub(int n1 , int n2)
{
num1= n1;
num2= n2;
return num1-num2;
}
int mult(int n1 ,int n2)
{
num1= n1;
num2= n2;
return num1*num2;
}
int div(int n1 , int n2)
{
num1= n1;
num2= n2;
return num1/num2;
}
int mod(int n1 ,int n2)
{
num1= n1;
num2= n2;
return num1%num2;
}
};

int main()
{
int x , y , result=0;
calculator simple;
cout<<"Number 1 : "; cin>>x;
cout<<<"Number 2 : "; cin>>y;
cout<
result=simple.add(x,y);
cout<<"sum is : "<<
result=simple.sub(x,y);
cout<<"subtraction is : "<<
result=simple.mult(x,y);
cout<<"multiplication is : "<<
result=simple.div(x,y);
cout<<"division is : "<<
result=simple.mod(x,y);
cout<<"modulus is : "<<
system("pause");
}