Public and Private Variables in C++

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I have a class. There is a function and a variable.

C++

class myClass
{
private:
   int num;
   int Calc(int x);
};

int myClass::Calc(int x)
{
   int num = 12536; //constant
   return num /*First One (Global)*/ + num /*2nd One (1 inside the function*/ + x;
}

Now, How Can I use both variables(num's) inside Calc Function ? I think above function is not corrent.

Posted 13-Sep-12 4:59am

Captain Price

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[no name] 13-Sep-12 11:06am

Try this.num for the "gobal"

Philip Stuyck 13-Sep-12 11:57am

this is very bad programming. Avoid reusing names like this.
There is coding conventions to be followed:
int _num; for member variables
int lnum; for local variables if you want to emphesize that they are local.
variable name hiding is what you do here, and is not a good idea.

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__John_ · Accepted Answer · 2012-09-13T05:07:00

Solution 1

Use:

C++

this->num

To referance your class member.

[edit]
Actualy the best solution would be to change the names so as to remove any ambiguity.

C++

this->num

Will also work though.

Posted 13-Sep-12 5:07am

__John_

Updated 13-Sep-12 5:29am

v2

Comments

Captain Price 13-Sep-12 11:33am

thanks, it helps