Calculator (C++)

#include "stdafx.h"
#include <iostream>
using namespace std;

void plus();
void minus(); 
void mult();     //Here are the declerations of the functions.
void dev();
void exit();


int main()
{
    int sth=0;
   
    while(1) //The while loop,will execute again and again the stuff below(but only code which is in it's scopes!)
    {
      cout << "Press 1 for Addition" << endl;
      cout << "Press 2 for Subtraction" << endl ;    //Here are the senteces about calculations..
      cout << "Press 3 for Multiplication" << endl;
      cout << "Press 4 for Devision" << endl ;
     


int choice;
    cin >> choice;
   
   
    switch (choice) //The switch statement,is like the if statement.It will run the cases below.
    {
   
case 1:
    choice = 1;
        cout << "->Addition\n";
                plus();
                    break;
   
   
   
case 2:
    choice = 2;
        cout << "->Subtraction\n";  
                minus();
                    break;



case 3:
    choice = 3;
        cout << "->Multiplication\n";  
                mult();
                    break;                   
   
   
   
   
case 4:
    choice = 4;
        cout << "->Devision\n";
                dev();
                    break;


}
continue; //Here the loop will stop and run again from the beginning.

}
       
    char f;
    cin >> f;
    return 0;

}


void plus()  //Here are the function's definitions.
{
    int my[2]; //The array here,will make 2 new integer variables,for later use.

    cout << "Put 1st number:  ";
   
    cin >> my[0]; //Int the 1st array here will be put the 1st number.
   
    cout << "Put 2nd number:  "  ;
   
    cout << endl;

    cin >> my[1]; //And here the 2nd.

    cout << "The result is : ";
   
    cout << my[0] + my[1] << endl; //This will print out the result.
   
    exit(); //And at the end the "exit" function will be called!

}

void minus()
{
   
    int my[2];

    cout << "Put 1st number:  ";
   
    cin >> my[0];
   
    cout << "Put 2nd number:  " << endl ;
   
    cin >> my[1];
   
    cout << "The difference is : ";
   
    cout << my[0] - my[1]<< endl ;

    exit();

}

void mult()
{
    int my[2];

    cout << "Put 1st number:  ";
   
    cin >> my[0];
   
    cout << "Put 2nd number:  " << endl ;
   
    cin >> my[1];
   
    cout << "The product is : ";
   
    cout << my[0] * my[1] << endl ;

    exit();

}

void dev()
{
    int my[2];

    cout << "Put 1st number:  ";
   
    cin >> my[0];
   
    cout << "Put 2nd number:  " << endl ;
   
    cin >> my[1];
   
    cout << "The quotient is : ";
   
    cout << my[0] / my[1] << endl;
   
    exit();

}                                                                           

void exit()
{
    cout << "                                                      Press 0 to Exit" << endl ;
   
    int quit;
            cin >> quit;
            if (quit == 0)
            {
            exit(0);
            }
 
}