Undefined Reference to `Class::Class Constructor'

Asked Dec 15 '20 at 21:50

Active Dec 15 '20 at 21:50

Viewed 37 times

I am trying to create an array of objects with the class Sqr which is derived from Rect. But I am getting this error - undefined reference to `Sqr::Sqr()'. This is the code -

#include <iostream>

using namespace std;

class Rect
{
    float length, bredth;
public:
    Rect();
    Rect(float l, float b) : length(l), bredth(b){}
};

class Sqr : public Rect
{
public:
    Sqr();
    Sqr(float side) : Rect(side, side){}
};

int main(int argc, char const *argv[])
{

    Sqr ss[10];
    return 0;
}

asked Dec 15 '20 at 21:50

BlackSwordsman

3

Where is `Sqr::Sqr()` defined? Or `Rect::Rect()`? All I can see, are declarations for those. – Algirdas Preidžius Dec 15 '20 at 21:51
Just search for the error next time. – Ulrich Eckhardt Dec 15 '20 at 21:58
1

`Sqr();` declaration. `Sqr(){}` definition and declaration. – user4581301 Dec 15 '20 at 22:05
Strange thing is that you have correctly defined `Sqr::Sqr(float side)`. Can you not see the difference with `Sqr::Sqr()`? – john Dec 15 '20 at 22:09
@user4581301 Thank you for the short explanation I fixed it now. I am new to cpp that is why I am confused in this type of things :") – BlackSwordsman Dec 16 '20 at 19:29

Undefined Reference to `Class::Class Constructor'

0 Answers0