I have been given a header file to work from as an assignment, and a constant pointer is used: int * const acctFd
Can I alter the value of this pointer? If so, how? Its a file descriptor, and I have been trying to alter it using: fopen('pathname', "r+"); and then return it, however I cannot seem to set it.
Any ideas?
Thanks,
Chris
This code looks like C++. If that is the case, then you cannot modify the value of the pointer without casting, but you can modify what the pointer points to.
needs to beCode:fopen('pathname', "r+");
Not sure if you did that just for clarity or if your actual code is written that way (usually when you're putting something like that, you do <pathname> to indicate a value goes there).Code:fopen("pathname", "r+");
I'm just pointing this out because passing a string with single quotes (which are used for character literals) will cause a compiler error.
>Any ideas?
Assignment is different than initialization.
Code:#include <stdio.h> int main(void) { int i = 42; int *const p; int *const q = &i; /* initialization */ /*p = &i; // assignment - error */ printf("*q = %d\n", *q); return 0; }
7. It is easier to write an incorrect program than understand a correct one.
40. There are two ways to write error-free programs; only the third one works.*
