variable declare by struct

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my question is declare variable x1, x2 and x3 as structure of type complex
may i know my below answer correct?

struct complex{
   struct complex *x1;
   struct complex *x2;
   struct complex *x2;
};

Posted 28-Apr-11 9:47am

Jayfam

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Nish Nishant · Accepted Answer · 2011-04-28T09:51:00

Solution 1

Uhm no, it's not.

Here's C code (not C++) :

C++

struct complex
{
    // struct members
    double realPart;
    double imaginaryPart;
};

void Foo()
{
    struct complex x1;
    struct complex x2;
    struct complex x3;
}

Posted 28-Apr-11 9:51am

Nish Nishant

Updated 28-Apr-11 9:55am

v2

Comments

Jayfam 28-Apr-11 15:53pm

the question just declare variable x1, x2 and x3 as structure of type complex , why your answer got int z ?

Nish Nishant 28-Apr-11 15:54pm

In C (not C++) a struct must have at least 1 member.

Nish Nishant 28-Apr-11 15:55pm

The int z was just an example. You would need to define members based on your scenario.

Nish Nishant 28-Apr-11 15:56pm

Manfred has updated the code to make it more obvious.

Jayfam 28-Apr-11 16:02pm

void Foo()　ｍｅａｎ？

Albert Holguin 28-Apr-11 16:03pm

its a common made up name for any function, its all over C and C++ books

Nish Nishant 28-Apr-11 16:03pm

Just a dummy function I used in the example. You can declare these globally too, no need to make them locals if you prefer them to be globals.

Jayfam 28-Apr-11 16:04pm

ok, understand. Thanks guys.

Albert Holguin 28-Apr-11 16:07pm

btw, I would also recommend the practice of using all caps for structure names... see my solution

Nish Nishant 28-Apr-11 16:09pm

You're welcome.

Jayfam 28-Apr-11 16:08pm

ok

Jayfam 28-Apr-11 16:11pm

a new question about struct
http://www.codeproject.com/Questions/188481/Write-a-statement-which-can-receive-input-from-use.aspx

Albert Holguin · Accepted Answer · 2011-04-28T09:56:00

Solution 2

no.

struct COMPLEX x1;
struct COMPLEX x2;
struct COMPLEX x3;

if...

C++

struct COMPLEX{
 double real;
 double imaginary;
};

or...

COMPLEX x1;
COMPLEX x2;
COMPLEX x3;

if...

typedef struct _COMPLEX_{
 double real;
 double imaginary;
} COMPLEX;

Posted 28-Apr-11 9:56am

Albert Holguin

Updated 28-Apr-11 9:57am

v2