让一个 .cpp 文件与一个 class.cpp 和一个 class.h 文件通信

Question

I don't know the correct syntax for Dice.h and Dice.cpp to talk to my final game.cpp file.

I am getting a compile error that is returning a undefined reference to Dice::Dice()

Here are my 3 file headers

Game.cpp

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

using namespace std;

int main()
{ int sum;
  Dice dice1;
  Dice dice2;
      dice1.roll();
      dice2.roll();
      sum = dice1.getFace() + dice2.getFace();
      cout << sum;

  return 0;

}

Dice.h

#include <iostream>
#include <cassert>
#include <cstdlib>
#include <ctime>


// definition of class Dice
class Dice //... cont

Dice.cpp

#include "Dice.h"
using namespace std;


Dice::Dice() //... cont 

I get the error when i compile by typing g++ -Wall -o game game.cpp Is this the correct way to compile multiple files?

Answer 1

Just because you have the includes in the files doesn't mean they will be compiled together.

Try g++ -Wall -o game Dice.cpp Game.cpp

...I could be slightly wrong on the command but that should work

Side note you should really look into Makefiles. Makes everything so much easier.

Answer 2

The other answer is close, but slightly off. Enter

++ -Wall -o game game.cpp Dice.cpp

Make sure that game is lower case, and I think the file containing main() needs to go first.