declaring union

[stdvu]

how do you declare a union with a defined union?

[JosAH]

Say what?

kind regards,

Jos

[stdvu]

lollllllz

well i was supposed to write a code which i have written but the last statement in the exercise was something i didnt understand .... and that is

Declare another union of the same constitution using the previously defined Union.

[stdvu]

I was supposed to define a union as a datatype suppose i gave it a name as store now how am i suppose to declare another union with this named union??

[Banfa]

You mean you did something like this

struct MyStruct {
   int SomeData;
} StructInstance1;
 

To declare another data store all I need to do is

struct MyStruct StructInstance2;
 

Only of course you would need to use unions.

[stdvu]

oh ok ...... thanks!

[stdvu]

ok so if i write it like this

#include <stdio.h>

typedef union
{
int a;
char b;
}data;
union data data1;


is it fine?

the ques was actually this

Define a union that can store both char and int type data values. You need to define that in a way such that later, the union name can be used as a data type itself. Declare another union of the same constitution using the previously defined Union.

Sorry but m totally new to C and home based student so having a lot of problem studying myself ..... sorry for asking too many ques

[arnaudk]

define that in a way such that later, the union name can be used as a data type itself.

The way I read it, this means you should be able to declare another union using a single type specifier. In other words, use a typedef just like you did and then you can declare more unions like this:

data unioninstance

(because of the typedef, "data" can be used as a type in itself and doesn't need to be preceded by the "union" keyword.)

[stdvu]

thanks ! :) thanks for all your help..