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Dereferencing Structures

This is a discussion on Dereferencing Structures within the C Programming forums, part of the General Programming Boards category; Code: typedef struct abc { int y; char *b; }abc, *abcptr; abc x={2,"sdgare"}; void *a; void function(void *data) { a=data; ...

  1. #1
    Registered User
    Join Date
    Aug 2012
    Posts
    24

    Dereferencing Structures

    Code:
    typedef struct abc
    	{
    		int y;
    		char *b;
    	}abc, *abcptr;
    abc x={2,"sdgare"};
    void *a;
    
    
    void function(void *data)
    {
    	a=data;
    }
    
    
    int main()
    {
    	function(&x);
    	printf("%d",(abcptr)(a)->y);	
    	return 0;
    }
    This code gives me an error:- error C2223: left of '->y' must point to struct/union

    Could someone please tell me why and how to make it work?
    Thanks in advance!

  2. #2
    Registered User
    Join Date
    Dec 2011
    Posts
    795
    Your parentheses are wrong, it should be:
    Code:
    ((abcptr)a)->y
    Also, you should avoid using globals and using typedefs to disguise pointers needlessly.
    Phoebe likes this.

  3. #3
    Registered User
    Join Date
    Aug 2012
    Posts
    24
    Thanks for the help!

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