need help with calculator

Code:

---

// my calculator.cpp : Defines the entry point for the console application.
//

#include <iostream>
using namespace std;

int main()
{
        int first, second, todo;
       
        cout << "This is a calculator for basic math functions between two integers.\n";
        cout << "What would you like to do?\n1: Addition\n2: Subtraction\n3: multiplication\n4: Division\n";
        cin >> todo;
        if (todo > 4)
                cout << "Please enter a number 1 - 4";
        cout << endl;
        cout << "Please insert the two integers you would like to use: ";
        cin >> first;
        cin >> second;
        if (todo == 1)
                cout << "The answer is: " << first + second << endl;
       
        if (todo == 2)
                cout << "The answer is: " << first - second << endl;
       
        if (todo == 3)
                cout << "The answer is: " << first * second << endl;
       
        if (todo == 4)
                cout << "The answer is: " << first / second << " With a remainder of " <<  first % second << endl;
       

        system("pause");
return 0;
}

---

when the user inputs an incorrect number for addition subtraction etc. it says "please enter a number 1 - 4" but then it just goes to the next step, how can i fix this?

What you need is a loop. A while loop works perfectly here.

ok thanks

Dont use system("pause") as system calls are not safe.

Use cin.get()

I'd say - do not use this stuff at all

Ctrl+F5 in VS will run the window that will not close till you press space

And when running in debug with F5 - you always can put breakpoint on return 0; of main to prevent program from closing

So this artificial pause has no meaning at all