#include <iostream>
#include <conio.h>

using namespace std;

    double num1;
    double num2;
    double num3;
    string yesorno;
    string yesorno2;
    string operator1;

    void mean();
    void pausewithtext();
    void gotomain();

int main()
{


    printf ("\nThis program will let you +, -, * or / numbers\n Please enter the operator you wish to use: ");
           cin >> operator1; cout << endl;
    printf ("Please enter the first number you wish to use: ");
           cin >> num1; cout << endl;
    printf ("Please enter the second number you wish to use: ");
           cin >> num2; cout << endl;
    printf ("Do you want to use a 3rd number? (y/n)");
           cin >> yesorno; cout << endl;
                if ((yesorno == "y") || (yesorno == "Y")) {
                    printf("Please enter the third number you wish to use: ");
                    cin >> num3;

                                /* This is the code for actual calculating (3 numbers) */
                            if (operator1 == "+")
                               {
                                    mean();
                                   //Addition for 3 numbers
                                    cout << "Answer: " << num1 + num2 + num3 << endl;
                                    pausewithtext();
                                    gotomain();
                               }
                               else if (operator1 == "-")
                               {
                                   //Subtraction for 3 numbers
                                   cout << "Answer: " << num1 - num2 - num3 << endl;
                                   pausewithtext();
                                   gotomain();
                               }
                               else if (operator1 == "/")
                               {
                                   //Division for 3 numbers
                                   cout << "Answer: " << num1 / num2 / num3 << endl;
                                   pausewithtext();
                                   gotomain();
                               }
                               else if (operator1 == "*")
                               {
                                   //Multiplication for 3 numbers
                                   cout << "Answer: " << num1 * num2 * num3 << endl;
                                    pausewithtext();
                                    gotomain();
                               }
                               else
                               {
                                    printf("This happenes when the operator does not == /, +, - or * with 3 numbers");
                                    pausewithtext();
                                    gotomain();
                               }
                                /* End calculating (3 numbers)*/
                }
                else
                {

                                /* This is the code for actual calculating (2 numbers) */
                            if (operator1 == "+")
                               {
                                   //Addition with 2 numbers
                                   cout << "Answer :" << num1 + num2 << endl;
                                   pausewithtext();
                                   gotomain();
                               }
                               else if (operator1 == "-")
                               {
                                   //Subtraction with 2 numbers
                                   cout << "Answer: " << num1 - num2 << endl;
                                   pausewithtext();
                                   gotomain();
                               }
                               else if (operator1 == "/")
                               {
                                   //Division with 2 numbers
                                   cout << "Answer: " << num1 / num2 << endl;
                                   pausewithtext();
                                   gotomain();
                               }
                               else if (operator1 == "*")
                               {
                                   //Multiplication with 2 numbers
                                   cout << num1 * num2 << endl;
                                    gotomain();
                               }
                               else
                               {
                                    printf("This happens when the operator does not == /, +, - or * with 3 numbers");
                                    pausewithtext();
                                    gotomain();
                               }
                                /* End calculating (2 numbers)*/

                }
}


void mean()
{
     printf ("\nDo you want to use take the mean of your numbers? (y/n)");
           cin >> yesorno; cout << endl;
                if ((yesorno == "y") || (yesorno == "Y"))
                {
                        cout << "The answer is: " << (num1 + num2 + num3) / 3 << endl;
                        pausewithtext();
                        gotomain();
                }
                else
                {
                }
                }

void pausewithtext()
{
     cout << "Press any key to continue...";
     getch();
     }

void gotomain()
{
     main();
}