Thread: question about basic programming

  1. #1
    Registered User
    Join Date
    Dec 2016

    question about basic programming

    when running the following code, why do I get two different memory addresses?
    #include <stdio.h>
    int main(void){
        int  short signed number=-3;
        int short signed *pointer=&number;
        printf("the value of number is %d",number);
        printf("\n it's address in memory is %p",pointer);
        printf("\n it's address in memory is %d",pointer);
        return 0;

  2. #2
    C++ Witch laserlight's Avatar
    Join Date
    Oct 2003
    The pedantically correct way to do this is with:
    printf("\n it's address in memory is %p", (void*)pointer);
    Though you probably can get away without the cast to void*.

    Anyway, glossing over the undefined behaviour, you probably got the same address printed, just that they look different, kind of how "one hundred" and 100 (in base ten) are the same number but look rather different.
    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

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