Solved

c question

Posted on 2007-03-26
2
197 Views
Last Modified: 2010-04-15
what does a=(0) mean in this code.??

int main(){
    struct xyz{
           int i;
           };
        xyz *p,a=(10);
        *p=a;
        p->i=10;
        printf("%d",a.i);
        getch();
}
0
Comment
Question by:shilpi84
2 Comments
 
LVL 53

Accepted Solution

by:
Infinity08 earned 250 total points
ID: 18794598
It's not valid C.

Use this instead :

int main(){
  struct xyz {
    int i;
  };
  struct xyz *p, a = { 10 };  /* <-- the correct way to initialize a struct is with {}'s */
                              /* <-- you have to use "struct xyz" instead of just "xyz" */
  p = &a;   /*  <-- don't assign to *p, as you haven't allocated memory for it !! */
  p->i = 10;
  printf("%d", a.i);
  getch();
}
0
 
LVL 84

Assisted Solution

by:ozo
ozo earned 250 total points
ID: 18794629
assuming you meant
 struct xyz *p,a={10};
it means
struct xyz a;
a.i=10;

but
 *p=a;
refrerences an uninitialized pointer, which makes the behaviour of the program undefined
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This tutorial is posted by Aaron Wojnowski, administrator at SDKExpert.net.  To view more iPhone tutorials, visit www.sdkexpert.net. This is a very simple tutorial on finding the user's current location easily. In this tutorial, you will learn ho…
Summary: This tutorial covers some basics of pointer, pointer arithmetic and function pointer. What is a pointer: A pointer is a variable which holds an address. This address might be address of another variable/address of devices/address of fu…
The goal of this video is to provide viewers with basic examples to understand opening and writing to files in the C programming language.
The goal of this video is to provide viewers with basic examples to understand how to create, access, and change arrays in the C programming language.

822 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question