CODEWITHSUNDEEP
c++classconstructorreturn-type
Awalrod
Awalrod

Reputation: 268

C++ constructor problems

I haven't used c++ for a long time and I never really did grasp classes too well.
I decided to relearn classes by making a small geometry app.
Here is square.h:

class Square{
public:
    float width;
    float height;
    float area;
    float perimeter;


    void Square(int,int);
    void Square();
    void ~Square();




};

Here is square.cpp:

#include "square.h"

Square::Square (int w, int h){
    width = w;
    height = h;
    area = width * height;
    perimeter = (width*2)+(height*2);
}

Square::Square (){

}

Square::~Square (){

}

When I run/build the program it says error: return type specification for constructor invalid
I guess this is saying the constructors and destructors should be something other than void, but I think I'm wrong.

Upvotes: 0

Views: 166

Answers (4)

lukai
lukai

Reputation: 576

Constructor and destructor have no return type. They are a special kind of function of class having the same name of the class.

class Square{
public:
    float width;
    float height;
    float area;
    float perimeter;


    Square(int,int);
    Square();
    ~Square();




};

Upvotes: 0

Karadur
Karadur

Reputation: 1246

In constructors and destructors there should be no return type at all,

class Square
{
public:
    float width;
    float height;
    float area;
    float perimeter;


    Square(int,int);
    Square();
    ~Square();

};

Upvotes: 0

sgun
sgun

Reputation: 899

get rid of void in constructors and destructor.

Square(int,int);
Square();
~Square();

And a suggestion since you are learning. If you are not thinking of exposing class variables to subclasses, make them private.

Upvotes: 0

tckmn
tckmn

Reputation: 59363

I guess this is saying the constructors and destructors should be something other than void

Yes, it should be:

Square(int,int);
Square();
~Square();

I thought void means the function doesn't return anything?

Yes, but these are not functions. They're constructors and destructors, which don't need a specified return type.

Upvotes: 3

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