/*
    testfunc08.cpp
    CIS 150
    2008-06-10
    David Klick
   
    This program demonstrates static local variables.
*/

#include <iostream>
using std::cin;
using std::cout;

void cont();
int counter1(); // function prototype 
int counter2(); // function prototype 

int main(int argc, char* argv[]) {
    int i;
    for (i=0; i<9; i++) {
        cout << counter1() << ", "
             << counter2() << '\n';
    }
   
    cont();
    return 0;
}

/*
    int counter1();
   
    Arguments: none
   
    Returns: the value of its local count variable incremented
        by 10 (which will always be 10)
   
    Increment counter by 10 and return value. (non-static counter)
*/
int counter1() {
    int count = 0;
    count += 10;
    return count;
}

/*
    int counter2();
   
    Arguments: none
   
    Returns: the value of its local static count variable
        incremented by 10 (which will increase each time this
        function is called)
   
    Increment counter by 10 and return value. (static counter)
*/
int counter2() {
    // static locals retain their value between function calls
    // the static initialization will only happen the first call
    static int count = 0;
    count += 10;
    return count;
}

/*
    void cont();
   
    Arguments: none
   
    Returns: nothing
   
    Clears input buffer and pauses waiting for user 
    to press Enter.
*/
void cont() {
    if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
    cout << "Press enter to continue...";
    cin.get();
}

/*
    Sample output:
   
    10, 10
    10, 20
    10, 30
    10, 40
    10, 50
    10, 60
    10, 70
    10, 80
    10, 90
*/