Class and Global Variable Manipulation

Hey there!

I have this program, where I have a class, and inside the class there is a function named Function1...Function1 has an argument that should be subtracted from a variable that is not in its class or argument...So let's say it's like this:

Code:

int GlobalVariable1;

int main()
{

class Class1
{
void Function1(int Argument1);
};

void Class1::Function1(int Argument1)
{
/* I want the Argument1 in Class1 to be subtracted from the GlobalVariable1, which is not in the class. The code would be here! */
}

}

How would I do this?

Why do you want to do this? And why do you have your class and member function definition in the global main() function?

Better examples generally result in better replies, but...

Code:

#include <iostream>

int GlobalVariable1;

class Class1
{
public:
   void Function1(int Argument1);
};

void Class1::Function1(int Argument1)
{
   /* I want the Argument1 in Class1 to be subtracted from the GlobalVariable1, 
     which is not in the class. The code would be here! */
   GlobalVariable1 -= Argument1;
}

int main()
{
   Class1 Obj1;
   std::cout << "GlobalVariable1 = " << GlobalVariable1 << '\n';
   Obj1.Function1(5);
   std::cout << "GlobalVariable1 = " << GlobalVariable1 << '\n';
}

/* my output
GlobalVariable1 = 0
GlobalVariable1 = -5
*/

Yay! Thank you!

Yeah, my code is actually 6000 times better, but I made this in two seconds, so I forgot alot of things. In the actual code, the class is declared outside of the main function...

Global variables can be accessed by anyone. Classes are no different. However know that by doing this you are violating just about every object-oriented design principle. If you find that you need to do this to get the code working, IMO a re-design is in order.