C++ - external Classes - Can anyone help me to solve my Problem?

Question

I made a C++ Program, which has an external Class like they made in the C++ Course at the Part: "more on Classes". But my Code::Blocks always output a Error with:

"||=== Build: Debug in Sololearn_2 (compiler: GNU GCC Compiler) ===|
C++\Sololearn_2\classnew.cpp -o obj\Debug\classnew.o||No such file or directory|
||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|"

The .h and the .cpp File of the Class are in my Project directory and i don't find any Solutions for this Error. Do someone know about this Problem?

Answer 1

do you have
#include "classnew.h"
at the top of your cpp files?

example:

main.cpp file:

#include <iostream>
#include "MyClass.h"

using namespace std;

int main() {
MyClass mc;
mc.sayHello();
}

MyClass.h file:

#ifndef _MYCLASS_H_
#define _MYCLASS_H_

void sayHello();

#endif _MYCLASS_H_

MyClass.cpp file:

#include <iostream>
#include "MyClass.h"

using namespace std;

void sayHello() {
cout << "Hello" << endl;
}