Question

I have a class ABC in C++ .h class file.

.h file

#ifndef ABC_H_
#define ABC_H_

class ABC
{
  public:
    int x;
    int y;
};
#endif

.cpp file

//----- Empty  -----------

Main program .cpp

#include <iostream>
#include "ABC.h"
using namespace std;
    int main() {
      ABC a1;
      a1.x=5; a1.y=2;
      cout<<a1.x;
      // ...
    }

Error during compiling in Eclipse:

symbols not found for architecture x86_64

ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make: *** [CPPProgram] Error 1

All the other hello world programs etc. compile and run fine. I remember facing this error coming when I did the definition and implementation in separate files while using templates (and it went away when I implemented the definition and the implementation in same file)

I am not sure about what’s wrong here. Any suggestions?

Answer 1

In the code you posted, you are missing a semi-colon:

class ABC
{
public:
int x;
int y;
};
 ^