Question

I have a program:

#include <iostream>

#define _DEBUG = 1

using namespace std;
int main() {
        #if (_DEBUG == 1)
                cout << "hello : " <<endl;
        #endif

        return 0;
}

Compiling this gives the error:

$ g++ a.cpp
a.cpp:7:7: error: token "=" is not valid in preprocessor expressions
$ g++ --version
g++ (MacPorts gcc46 4.6.3_8) 4.6.3

I thought == is the equality conditional operator?

Answer 1

Just a typo, I think:

#define _DEBUG = 1

should be

#define _DEBUG 1

I do that all the time!