Global Structure question.

Hi guys, I've been trying to figure this out for hours now, but can't seem to make it work.

I have defined a global struct outside main, and also set it to NULL. In main I assign an int to the struct and prints it fine, but then when I call another function and create a copy of the global struct, I can't seem to access the same struct. The example below is just what I'm trying to figure out first to then apply it to my own code.

any input is highly appreciated.
Happy 4th of July!!!

tdep

Code:

---


struct hello{
  int test;
}

struct hello newHello = NULL;

main(){
  struct hello * newHello = malloc....
  newHello->test = 1980
  printf("%d", newHello->test); //PRINTS 1980
  outside();
}

outside(){
    struct hello *SecondHello = malloc....
    SecondHello = newHello;
    printf("%d", SecondHello->test); //WONT print 1980
}

---

You mean structure assignment?

Code:

---

*SecondHello = *newHello;

---

If you assign one structure to another, each member will be copied over. (It's what's termed a shallow copy.)

[edit] There were several other problems with your code. I'm assuming that this is what you're looking for:

Code:

---

#include <stdio.h>
#include <stdlib.h>

struct hello {
    int test;
};

struct hello *newHello = NULL;

void outside();

int main() {
    newHello = malloc(sizeof(*newHello));
    newHello->test = 1980;
    printf("&#37;d\n", newHello->test); //PRINTS 1980
    outside();
   
    getchar();
    return 0;
}

void outside() {
    struct hello *SecondHello = malloc(sizeof(*SecondHello));
    *SecondHello = *newHello;
    printf("%d\n", SecondHello->test); //WONT print 1980
}

---

[/edit]

It does print 1980 =/

Yeah, I just copied your code, comments and all. :)

Yeah I was just missing the pointer signs there.

I just added a next pointer to hello. I have to add more ints to the list using the function outside.

For some reason, the implementation is not working in the big picture. :( I'm getting a segmentation fault.

Hopefully I'll get it working before fireworks. yehhhhhh

It wasn't mine lol

I need an avatar..

oh yeah Forgot to say thanks. You put me on the right track to do what I have to do.

Thanks a lot!!