help again please sorry?

**wart101** · 10-27-2005

i just need to see if i'm getting things right.

a local veriable is one that can only be used inside a single funtion but a globel variable can be used inside all functions.
if this is true how do you declare globel variables

**rockytriton** · 10-27-2005

declare the varible outside of a function....

Code:

int this_is_global = 1;

void myFunc()
{
    int this_is_local = 2;
}

**Quantum1024** · 10-27-2005

Thats correct. You declare global variables either in a header file (.h) which would be included by all source files that need to access the global variable or in the source file but not inside any function.

**rockytriton** · 10-27-2005

well, if you declare it in a header file, it will need to be given the keyword extern and will still need to be declared somewhere else. If you don't do this, the linker will get a conflict when more than 1 file includes the header.

**wart101** · 10-27-2005

should this work or am i getting the whole concept wrong?

Code:

#include <iostream>

using namespace std;

inline void b() {

	cout<< a <<endl;
	cin.get();

}

int a;

int main () {

	cout<<"number";
	cin>> a;
	cin.get();
	cout<< a <<endl;
	cin.get();
	b();

}

**wart101** · 10-27-2005

sorry i just worked it out you have to declare it before the function you wish to use it on

**dwks** · 10-27-2005

This won't compile

Code:

inline void b() {

	cout<< a <<endl;
	cin.get();

}

int a;

But this will

Code:

int a;

inline void b() {

	cout<< a <<endl;
	cin.get();

}

You have to declare global variables before their first use.

Thread: help again please sorry?

Thread Tools

Search Thread

Display

help again please sorry?