Thread: Global variable question

Consider this:

Code:

#include <stdio.h>

int a = 10;

int main(void)
{
    int a = 15;
    int b = a;

    return 0;
}

What if I want to assign the value of global variable a to b?

Then don't do something stupid like having two variables of the same name.

In C++ you can reference it by saying:

Code:

int b = ::a;

But that's entirely irrelevent here...

Originally Posted by csisz3r

Consider this:

Code:

#include <stdio.h>

int a = 10;

int main(void)
{
    int a = 15;
    int b = a;

    return 0;
}

What if I want to assign the value of global variable a to b?

If I recall correctly, the local variable will be used in this situation.
Thus making your global variable usage in main useless.

I know you were just curious. But avoid doing that.

Originally Posted by csisz3r

Consider this:

Code:

#include <stdio.h>

int a = 10;

int main(void)
{
    int a = 15;
    int b = a;

    return 0;
}

What if I want to assign the value of global variable a to b?

Easy, I'll make the change below:

Code:

#include <stdio.h>

int a = 10;

int main(void)
{
    int a = 15;
    int b = a;
    b = 10;
    return 0;
}

Originally Posted by cwr

Easy, I'll make the change below:

Code:

#include <stdio.h>

int a = 10;

int main(void)
{
    int a = 15;
    int b = a;
    b = 10;
    return 0;
}

lol. guys, guys...

pointers are your friend.

that's one great big reason why global variables are considered taboo -- its too easy to hide them, thus using the wrong version.

Code:

#include <stdio.h>

int a = 10;

int main(void)
{
   { int a = 15;}
    int b = a;
   
    return 0;
}

I think this will do what you want.i just remembered what my teacher said "FOOLISH QUESTION GET FOOLISH ANSWER".

No offence

Hey, my foolish answer is better