/*
    testfunc02.cpp
    CIS 150
    2008-06-10
    David Klick
   
    This program demonstrates how to create
    and call a function that has an argument.
*/

#include <iostream>
#include <iomanip>
using std::cin;
using std::cout;
using std::endl;
using std::fixed;
using std::setprecision;

void display(double x);  // function prototype 
void cont();

int main(int argc, char* argv[]) {
    double num = 9.87654321;
    display(num);         // call function using variable
    display(5.5555);      // call function using value
    display(2.0/3.0);     // call function using expression
   
    cont();
    return 0;
}

/*
    void display(double d);
   
    Arguments:
        double d: a value to be displayed on stdout with two digits
            after the decimal point
   
    Returns: nothing
   
    This function displays a double in fixed format with
    two digits after the decimal point.
*/
void display(double d) {
    cout << fixed << setprecision(2) << d << endl;
    return;        // optional since no value is returned
}

/*
    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();
}