Global variable question

This is a discussion on Global variable question within the C Programming forums, part of the General Programming Boards category; Consider this: Code: #include <stdio.h> int a = 10; int main(void) { int a = 15; int b = a; ...

  1. #1
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    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?

  2. #2
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    Then don't do something stupid like having two variables of the same name.

  3. #3
    ATH0 quzah's Avatar
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    Make a pointer to it first.


    Quzah.
    Hope is the first step on the road to disappointment.

  4. #4
    Registered User Tonto's Avatar
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    In C++ you can reference it by saying:

    Code:
    int b = ::a;
    But that's entirely irrelevent here...

  5. #5
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    Quote 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.

  6. #6
    cwr
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    Quote 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;
    }

  7. #7
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    Quote 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...

  8. #8
    ima n00b, ok? orion-'s Avatar
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    pointers are your friend.

  9. #9
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    that's one great big reason why global variables are considered taboo -- its too easy to hide them, thus using the wrong version.

  10. #10
    Registered User cbastard's Avatar
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    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

  11. #11
    cwr
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    Hey, my foolish answer is better

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