CODEWITHSUNDEEP
c++functionclassobjectundefined
Nikos Stamatis
Nikos Stamatis

Reputation: 3

Undefined reference to Class::Class/Function (Beginner in OOP)

I have this annoying error; Undefined Reference to Shape::Shape(...), Shape::getName(...), Shape::getAge(...)

My Main.cpp is this

#include <iostream>
#include <string>
#include "Bit.h"

using namespace std;

int main()
{
    //simple assignment
    string name;
    int age;
    cout<<"enter name: ";
    cin>>name;
    cout<<"enter age: ";
    cin>>age;

    Shape sh(name,age); //class declaration (i think here is the problem)

    cout<<endl<<"name: "<<sh.getName();
    cout<<endl<<"age: "<<sh.getAge();




    return 0;
}

This is the Bit.h header

#include <iostream>
#include <string>

using namespace std;

#ifndef BIT_H
#define BIT_H

 //creating class
class Shape{
    string newName;
    int newAge;

public:
    //Default Constructor
    Shape();
    //Overload Constructor
    Shape(string n,int a);
    //Destructor
    ~Shape();
    //Accessor Functions
    string getName();
    int getAge();

};

And finally, this is the Bit.cpp

#include "Bit.h"
//constructors and destructor
Shape::Shape(){
    newName="";
    newAge=0;
}

Shape::Shape(string n, int a){
    newName=name;
    newAge=age;
}

Shape::~Shape(){

}

string Shape::getName(){
    return newName;
}
//getters
int Shape::getAge(){
    return newAge;
}

I understand, that this might be a very simple problem/error, but I have been struggling for about 2 hours. I suppose that the error is in the declaration od "sh" object, even if I declare it like this "Shape sh();" or "Shape sh;", there are still errors. Thanks

EDIT. GNU GCC Compiler EDIT2. Using Code Blocks (sorry for forgetting all these)

Upvotes: 0

Views: 1984

Answers (1)

souki
souki

Reputation: 1385

You're probably not compiling Bit.cpp, but only Main.cpp.

Considering that Bit.h, Bit.cpp and Main.cpp are in the same folder, here is how you should compile it : 

g++ *.cpp

It will still not compile, as in the default constructor, you're trying to initialize name, and age which both don't exist.

You probably meant newAge, and newName?

In the other Constructor, name and age also don't exist, you probably meant n, and a?

Upvotes: 2

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