how to declare a global variable in mfc project

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C++

MFC

I want a vector that should be global, so that i can access it anywhere in my project.
thanks in Advanced.

Posted 10-Apr-15 2:02am

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Maciej Los 10-Apr-15 8:47am

Why?

Richard MacCutchan 10-Apr-15 11:29am

So make it a global variable. What is the problem?

Sergey Alexandrovich Kryukov 10-Apr-15 11:59am

Using global variables is a sign of bad code design. Why doing it?
—SA

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KarstenK · Answer 1 · 2015-04-10T06:44:00

Solution 1

It really sounds like poor design. It will make you trouble some day, so you harm yourself.

If you want to shot you in the knee:

in one (1) header or the class header

C++

extern MyVector theGlobal;

in one (1) cpp file or best the class implementation

C++

MyVector theGlobal;

Please read about MVC architecture to enhance your knowledge. (As thank for the answer)

Posted 10-Apr-15 6:44am

KarstenK

Comments

Sergey Alexandrovich Kryukov 10-Apr-15 15:29pm

Agree, my 5. However, it's possible that the inquirer also needs to understand the use of extern declaration and the nature of C/C++ linkage, which causes a lot of difficulties in many.
—SA