Learning how to use classes, have an "unidentified reference to main"

[GrantPlusPlus]

I just started teaching myself the concept of classes via the internet and I do not understand why my simple program isn't working. I know its a simple question probably with an obvious answer but I need some help to learn the ins and outs of C++.

#include <iostream>

using namespace std;

class classTest {
public:

// The Error is that it is an "unidentified reference to main."
int main()
{
cout << "Class Test";
return 0;

}



};

[htirwin]

The main function needs to be outside of the class

#include <iostream>
using namespace std;

class classTest {
public:

    void test() {
        cout << "class test" << endl;
    }

};

int main() {
    classTest ct; //declare an instance of the class
    ct.test();    //call classTest's member function

    return 0;
}

[TheIdeasMan]

Hi GrantPlusPlus,

You can't put main() inside a class.

The declaration of the class should go in the file classTest.h, the definitions of the functions in classTest.cpp, and main() appears only once in a .cpp file that can have any name you like - normally the application name.

I suggest you read the tutorial & reference info at the top left of this page, & probably get a good text book.

Good Luck !!

[GrantPlusPlus]

Thanks, I'll try that.