Thread: passing struct pointer to function.

Hello, I am trying to write a function that will take a struct pointer and some other values defined in the struct and within the function allocate memory for the struct and pass the values to it. How can this be done in C?


Here is some example code that does not work:

Code:

struct a
{
   int a;
   long b;
   char buf[32];
}


void createNode(struct a* x, int y, long z, char *mesg);
int main()
{
   struct a* x;
   int a=1;
   long b=2.0;
   char *msg = "This is a test";


   createNode(&x, a, b, msg);
}


void createNode(struct a* x, int y, long z, char *mesg)
{
   x=malloc(sizeof(struct a));
   x->a = y;
   x->b = z;
   strcpy(x->buf, mesg)
}

Hello,

Take a look at what your sending to your function and what you are expecting to receive, you should see there is a problem.

Thank you for the replies I see my misunderstanding