dank calculator

MAIN.CPP

#include <iostream>
#include <string>
#include "math.h"

using namespace std;

string welcome = "Simple Additon v1.0\n\n";
string name;

int getValue()
{
    int a;
    cout<<"Please enter a number.\n";
    cin>>a;
    cout<<"\n";
    return a;
}

string getName()
{
    string b;
    cout<<"Please enter your name.\n";
    cin>>b;
    cout<<"\n";
    return b;
}

string operation()
{
    string c;
    cout<<"Please enter the operation you want to do. (add, subtract, multiply, or divide.\n";
    cin>>c;
    cout<<"\n";
    return c;
}

int main()
{
    cout<<welcome;
    string name = getName();
    cout<<"Hello "<<name<<"!"<<"\n\n";

    int x = getValue();
    int y = getValue();
    string op = operation();

    if (op == "add")
    {
        cout<<"The answer is: "<<add(x, y);
    }
    if (op == "subtract")
    {
        cout<<"The answer is: "<<subtract(x, y);
    }
    if (op == "multiply")
    {
        cout<<"The answer is: "<<multiply(x, y);
    }
    if (op == "divide")
    {
        cout<<"The answer is: "<<divide(x, y);
    }
    return 0;
}

MATH.H

/* math.h
Does math related operations with integers
by Brendan Gowen
*/

// header guard
#ifndef MATH_H
#define MATH_H

int add(int x, int y)
{
    return x + y;
}

int subtract(int x, int y)
{
    return x - y;
}

int multiply(int x, int y)
{
    return x * y;
}

int divide(int x, int y)
{
    return x / y;
}

#endif