function cannot be overloaded error c++

Question

I'm learning composition by making a connect 4 game that has a column class within a board class. I have spent forever trying to figure out these overloading errors:

g++ -g -c C4Board.cpp -o C4Board.o C4Board.cpp:11:1: error: ‘C4Board::C4Board()’ cannot be overloaded C4Board(){ ^ In file included from C4Board.cpp:9:0: C4Board.h:7:5: error: with ‘C4Board::C4Board()’ C4Board(); ^ C4Board.cpp:20:1: error: ‘C4Board::~C4Board()’ cannot be overloaded ~C4Board(){} ^ In file included from C4Board.cpp:9:0: C4Board.h:9:5: error: with ‘C4Board::~C4Board()’ ~C4Board(); ^ C4Board.cpp:20:12: error: expected ‘}’ at end of input ~C4Board(){} ^

Here are my constructors:

#include <iostream> using namespace std; #include "C4Col.h" #include "C4Board.h" C4Board(){ numCol = 7; } C4Board(int columns){ numCol = columns; } ~C4Board(){}

I got rid of the C4Board:: before the constructors because it gave me this error in addition to the overloading errors:

 error: extra qualification ‘C4Board::’ on member ‘C4Board’ [-fpermissive] C4Board::C4Board(){ ^

Here is my .h file, although I don't believe it's the problem:

class C4Board{ public: C4Board(); C4Board(int); ~C4Board(); void display(); void play(); private: int numCol; C4Col Board[7]; }

Any help would be greatly appreciated.

I got rid of the C4Board:: before the constructors you need to have it in the .cpp — SingerOfTheFall
– SingerOfTheFall, Commented Feb 1, 2017 at 6:37
Now you have edited your question and changed the .h file. It is still wrong (missing a semicolon at the end), but have you tested that your change didn't fix the errors that you are asking about? — Thomas Padron-McCarthy
– Thomas Padron-McCarthy, Commented Feb 1, 2017 at 7:00

Juan Manuel Martinez Roman · Accepted Answer · 2017-02-01 06:48:36Z

compiler is recognizing functions as different, you have to specify that these are the definitions of your class methods...

C4Board::C4Board(){ numCol = 7; } C4Board::C4Board(int columns){ numCol = columns; } C4Board::~C4Board(){}

Thomas Padron-McCarthy · Accepted Answer · 2017-02-01 06:54:41Z

If that really is your .h file, it's missing a final }. That can give these symptoms.

Remember that the #include can be seen as putting the entire text of the .h file into the .cpp file. A missing final } results in your function definitions from the .cpp file being inside the class definition from the .h file.

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