Thread: ++k and k++ are different processes, or not?

I noticed a problem when I glanced at my studying document. The problem is about post and pre increment operator ++.

Here are the code in mydocument:

Code:

#include <iostream>
#include <conio.h>


using namespace std;


int k = 0; //global k


int main()
{
    int k; //local k


    for (k = 0; k < 10; k++) {  // LOOK AT HERE !!!!!!!!!!!!!!!!!!!!
           cout << " local variable " << k ;
           cout << " global variable " << ::k <<endl;
    }


    ::k++;


    cout << endl;


    cout << " After loop;\n" ;
    cout << " local variable : " << k ;
    cout << "\n global variable : " << ::k <<endl;


    getch();


    return 0;
}

Here are the output:


So what if the for loop was that ;
for (k = 0; k < 10; ++k)
Does the output change ?

I expect the same output except for line 1 in the output:
local variable 1 global variable 0

Then,
---------------------------------
local variable 2 global variable 0
local variable 3 global variable 0
...
bla bla bla
...
---------------------------------
Why the k is not 1 in the first looping in for loop ? Or is k++ and ++k the same thing? I know that these are different. But there are as if the same. Can anybody solve this problem in my mind?

Okay, I understand. Thank you for your answer.