Another Problem

I have now added a switch statement to the program below and when I try to compile it says 'MenuChoice undefined please use this function first', any ideas?

Code:

#include <iostream>

int MenuAndMenuChoice();
double Add();

int main()
{
    
    MenuAndMenuChoice();
    
    switch (MenuChoice)
    {
          
          case 1: Add();
          
    }
    
    std::cin.get();
    return 0;
}

int MenuAndMenuChoice()
{
    
    int MenuChoice;
    
    std::cout << "1.Add\n";
    std::cout << "2.Subtract\n";
    std::cout << "3.Multiply\n";
    std::cout << "4.Divide\n";
    std::cout << "5.Circle Area\n";
    std::cout << "6.Circle Circumference\n";
    std::cout << "7.Exit\n\n";

    std::cout << "What would you like to do? ";
    std::cin >> MenuChoice;
    
    return MenuChoice;
    
}

double Add()
{    
     
    double FirstNumber, SecondNumber, AddAnswer;
     
    std::cout << "What is the first number: ";
    std::cin >> FirstNumber;
    std::cin.ignore(80,'\n');
    
    std::cout << "What is the second number: ";
    std::cin >> SecondNumber;
    std::cin.ignore(80,'\n');
    
    AddAnswer = FirstNumber + SecondNumber;
    
    return AddAnswer;
    
}

sure
you could do

Code:

int main()
{
    int MenuChoice;
    MenuChoice = MenuAndMenuChoice();
    switch (MenuChoice)

or

Code:

int main()
{
    switch (MenuAndMenuChoice())

Never thought of that, thanks.