c++ - undefined reference to WinMain, [Error] Id returned 1 exit status

Question

What have I screwed up here? There can be no hard coded values in the code which is why all my prompts are constants. We also have to call a user defined function to verify input.

Im getting the following error when I compile -- undefined reference to WinMain, [Error] Id returned 1 exit status I'm using Dev C++ as an IDE

#include <iostream> //for I/O
#include <iomanip> //for formatting output

using namespace std;


const string PROGRAM_DESCRIPTION = "Program will calculate the amount "
"accumulated every month you save, 
until you reach your goal. ";
const string ENTER_DOLLAR_AMOUNT_MONTHLY = "Enter the dollar amount to be "
"saved each month: ";




int main()
{
    double dollarSavedPerMonth; 


    //displays program description
    cout << PROGRAM_DESCRIPTION << endl << endl;

    //Prompts user to enter dollar amount to be saved monthly, will validate
    //input by calling VerifyDollar
    dollarSavedPerMonth = VerifyDollar(ENTER_DOLLAR_AMOUNT_MONTHLY);
    cout << endl;



    return 0;
}




double VerifyDollar (string Prompt)
{
    const string INVALID_DOLLAR_AMOUNT = "Invalid amount, re-enter monthly "
    "savings amount.";
    double dollarSaved;

    cout << Prompt;
    cin >> dollarSaved;

    while (dollarSaved < 5 || dollarSaved > 5000)
    {
          cout << INVALID_DOLLAR_AMOUNT;
          cout << endl;
          cout << Prompt;
          cin >> dollarSaved;
    }
    return dollarSaved;
}

Answer 1

You do indeed lack a WinMain() function anywhere in that code.

If memory serves me well, WinMain() is the entry point for a Win32 GUI app. I am assuming your IDE asked you for a "project type" of some sort, and you asked for a Windows app instead of a Console one.

Under that assumption, something in your project is configured to call WinMain(), which you did not define, hence the linker error.