How to convert a variable to a double pointer

nilusha6 · #1 29-Oct-2009, 05:45

I have a variable in header file something like,

CPP / C++ / C Code:

typedef struct aa{
.....
type_of_variable **p_variable;
...
}aa;

Then i want to cast some other variable to, that pointer.
im getting that structer as a pointer variable in my function parameters.

CPP / C++ / C Code:

func_1 (aa *p_aa)
{
type_bb variable_2;

//I want to convert this variable_2 to type_of_variable
//Is the following line correct?????

aa->p_variable = (type_of_variable **) variable_2;
}

davekw7x · #2 29-Oct-2009, 08:33

Quote:

Originally Posted by nilusha6

...Is the following line correct?

1. What do you expect to happen when you try it?

2. What happens when you try it?

If (Result(1) == Result(2)) then it is correct, else it is not correct.

In other words: You can write a program that does what you say. Whether it is "correct" depends on what you are trying to accomplish. See Footnote.

Regards,

Dave

Alice: "Which way shall I go?"

Cheshire Cat: "Where do you want to go?"

Alice: "It really doesn't matter."

Cheshire Cat: "Then it doesn't matter which way you go."

---Lewis Carroll
Alice's Adventures in Wonderland

Howard_L · #3 29-Oct-2009, 09:08

Looks like it might should be:

CPP / C++ / C Code:

p_aa->p_variable = (type_of_variable **) variable_2;

but whether it's right or not depends on exaclty what "type_bb" and "type_of_variable" are.
Why don't you make a minimal working example of exactly what you are trying to do and post that.

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How to convert a variable to a double pointer

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