CODEWITHSUNDEEP
c++
Manoj Gupta
Manoj Gupta

Reputation: 298

not defined error c++ Static methods declared

I have a static method in class as follows in file Convert.h

class Convert
{
    public :
    static string convertIntToStr(unsigned int integer);    
};

In Convert.cpp

string 
Convert::convertIntToStr(unsigned int integer) 
{
    ostringstream ostr;
    ostr <<  integer;
    return ostr.str();
}

I use this in some other class method in another .cpp file as Convert::convertIntToStr, but I get linking error, which says undefined reference to Convert::convertIntToStr(unsigned int). Could you please let me know what could be wrong?

Upvotes: 2

Views: 632

Answers (5)

Raju
Raju

Reputation: 1169

Put class convert in a header file, and include the same in the other .cpp file

#ifndef CONVERT.H_
#define CONVERT.H_
class Convert
{
    public :
    static string convertIntToStr(unsigned int integer);    
};
#end if

Include it as #include "convert.h" in the other file.

Upvotes: 1

dev
dev

Reputation: 2200

if you have defined the Convert in a namespace make sure that you are including that namespace when you call. Something like

namespace::Convert::convertIntToStr(...)

or the calling class is in the same namespace.

Upvotes: 3

dieram3
dieram3

Reputation: 591

It's a linker error and happens when it can't find the definition of a function, global variable, etc... are you linking all of your objects files?

Upvotes: 3

sbaker
sbaker

Reputation: 537

This should really be a comment, but I'm new to SO and it doesn't let me add comments yet.

Sorry if this is a silly question, but are you sure Convert.cpp was added to your project? It sounds like Convert.cpp is not being compiled into an object for the linker.

Upvotes: 4

Natan Streppel
Natan Streppel

Reputation: 5866

Ensure that you are properly linking all of your object files.

Upvotes: 3

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