is there any variable type that we can change it's value in global scope?

[Cambalinho]

is there any variable type(or with another keyword) that we can change it's value in global scope?

[2kaud]

I'm not sure I'm understanding the question. Any non-const variable defined as being in global scope in a single program file can be changed anywhere in that program file after the definiton providing the variable hasn't been re-defined within a local block.

Do you mean that you want a global variable defined in one program file to be able to be accessed in another program file that is part of the same compilation project/solution?

[Cambalinho]

I'm not sure I'm understanding the question. Any non-const variable defined as being in global scope in a single program file can be changed anywhere in that program file after the definiton providing the variable hasn't been re-defined within a local block.

Do you mean that you want a global variable defined in one program file to be able to be accessed in another program file that is part of the same compilation project/solution?

example:

int a;
a=100;

i have seen something like these with 'static' variables

[2kaud]

Static variables are most commonly used in a function. The variable defined as static is local to the function but retains its value between each call to the function.

void fun1()
{
static int cnt = 0;

     cout << "cnt value is " << cnt++ << endl;
}

Every time you call fun1, cnt is incremented even though it is local to the function. See
http://msdn.microsoft.com/en-us/libr...vs.110%29.aspx

[Cambalinho]

Static variables are most commonly used in a function. The variable defined as static is local to the function but retains its value between each call to the function.

void fun1()
{
static int cnt = 0;

     cout << "cnt value is " << cnt++ << endl;
}

Every time you call fun1, cnt is incremented even though it is local to the function. See
http://msdn.microsoft.com/en-us/libr...vs.110%29.aspx

sorry but outside the function

[2kaud]

Like this?

int a;

void f1()
{
   a = 2;
}

int main()
{
   a = 1;
   f1();
   cout << "a " << a << endl;
   return 0;
}

static used at the global level simply means that the variable can't be used outside of that 'code unit'.