Menu
I'm trying to compile a very basic C++ program and there is something wrong. Whatever it is, I'm sure it's very obvious. I have three very short files.
main.cpp:
#include <iostream>
#include "Player.h"
using namespace std;
int main()
{
Player rob;
cout << "Iran" << endl;
return 0;
}
Player.h
#ifndef PLAYER_H
#define PLAYER_H
class Player {
public:
Player();
private:
int score;
};
#endif
Player.cpp
#include "Player.h"
Player::Player(){
score = 0;
}
The command I'm using to compile is g++ main.cpp -o main
And the error I'm being issued by the compiler is:
/tmp/ccexA7vk.o: In function `main':
main.cpp:(.text+0x10): undefined reference to `Player::Player()'
collect2: error: ld returned 1 exit status
Note: All these files are in the same directory.
294
Compilation process in C involves four steps: pre-processing, compiling, assembling, and linking. The preprocessor tool helps in comments removal, macros expansion, file inclusion, and conditional compilation. These commands are executed in the first step of the compilation process.
There are three basic steps involved in compiling a C program: preprocessing, compilation of C source code to machine code (or assembly) (also called object code), and linking of multiple object files into a single binary executable program.
Run the gcc command to compile your C program. The syntax you'll use is gcc filename. c -o filename.exe . This compiles the program and makes it executable.
Compiling: Compiling is the second step. It takes the output of the preprocessor and generates assembly language, an intermediate human readable language, specific to the target processor.
As mentioned in the comments, you are not feeding Player.cpp into compiler. You should give all the cpp files to the compiler.
g++ main.cpp Player.cpp -o main
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
