Return struct

This is a discussion on Return struct within the C Programming forums, part of the General Programming Boards category; How can i return a structure, I have tried this: Code: #include <stdio.h> struct list { int one, two=0; }; ...

  1. #1
    Registered User
    Join Date
    Aug 2007
    Posts
    270

    Question Return struct

    How can i return a structure, I have tried this:
    Code:
    #include <stdio.h>
    
    struct list 
    {
    	int one, two=0;
    };
    typedef struct list item;
    
    int main()
    {
    	item thingM;	
    	thingM = funct();
    	printf("%d\n", thingM.one);
    }
    
    item funct()
    {
    	item thing;
    	thing.one = 10;
    	return thing;
    }
    But i get the error message:
    Code:
    new.c:5: error: expected ‘:’, ‘,’, ‘;’, ‘}’ or ‘__attribute__’ before ‘=’ token
    new.c: In function ‘main’:
    new.c:12: error: incompatible types in assignment
    new.c: At top level:
    new.c:16: error: conflicting types for ‘funct’
    new.c:12: error: previous implicit declaration of ‘funct’ was here
    Last edited by taurus; 10-02-2009 at 10:16 AM.

  2. #2
    Dr Dipshi++ mike_g's Avatar
    Join Date
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    On me hyperplane
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    You need a prototype for funct(), or you need to define it before main(). IE:
    Code:
    #include <stdio.h>
    
    
    struct list
    {
    	int one, two;
    };
    typedef struct list item;
    
    item funct();
    
    int main()
    {
    	item thingM;
    	thingM = funct();
    	printf("%d\n", thingM.one);
    }
    
    item funct()
    {
    	item thing;
    	thing.one = 10;
    	return thing;
    }
    This worked for me.

  3. #3
    C++まいる!Cをこわせ! Elysia's Avatar
    Join Date
    Oct 2007
    Posts
    22,823
    Furthermore, you cannot assign values inside the struct declaration.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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