Thread: what the comparison does?

  1. #1
    Registered User
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    what the comparison does?

    Code:
    void func(int * p) { 
    
    printf("%s\n", p < (int*)(&p) ? "GREAT" : "LESS"); 
    }
    how the address are compared?

  2. #2
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by dpp
    how the address are compared?
    As pointers to int, I suppose. In what context did you see this code, or did you just come up with it yourself?
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
    ATH0 quzah's Avatar
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    Quote Originally Posted by pelicanpie View Post
    &p is the address of the variable p which happens to the store the address of where the int is stored
    Which in this case is the address of the local variable created for this function, to which p is assigned inside this function call:
    Code:
    #include<stdio.h>
    void func( int *p )
    {
        printf( "%p, %p\n", (void*) p, (void*) &p );
    }
    int main( void )
    {
        int x;
        int *p = &x;
        printf( "%p, %p\n", (void*) p, (void*) &p );
        func( p );
        
        return 0;
    }

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

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