Null pointer assignment

This is a discussion on Null pointer assignment within the C Programming forums, part of the General Programming Boards category; Hi I wrote a c program where my input is a file and i store output also in a file. ...

  1. #1
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    Null pointer assignment

    Hi
    I wrote a c program where my input is a file and i store output also in a file. Everything works fine. But in my command prompt it shows null pointer assignment. but my output is not affected. i know about null pointer assignment. but how to detect which part of my pgm is accessing that oth address which causes this error

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    Quote Originally Posted by Raghavan View Post
    Hi
    Everything works fine. But in my command prompt it shows null pointer assignment.
    It is not possible for both of these things to be true at the same time. I'm guessing, since you're posting here, that you mean the second one.
    Quote Originally Posted by Raghavan View Post
    how to detect which part of my pgm is accessing that oth address which causes this error
    With a debugger, if you have one. Judicious use of printf statements. Carefully examining your code for memory accesses.

    My Hat of Guessing thinks you are fclose'ing a file twice, but would not be willing to bet any amount of money at any odds that that is actually right.

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