/*
    testfunc06.cpp
    CIS 150
    2008-06-10
    David Klick
   
    This program demonstrates how to create
    a die rolling simulator that rolls two dice
    at a time (useful for games like craps).
*/

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
using std::cin;
using std::cout;

int roll();    // function prototype 
int roll2();   // function prototype 
void cont();

int main(int argc, char* argv[]) {
    int numrolls;  // how many times to roll the die
    int i;         // loop counter

    // initialize random number generator
    srand(time(0));
   
    // find out how many rolls the user wants
    cout << "How many rolls? (0 - 100) ";
    cin >> numrolls;
   
    // end program if user entered something invalid
    if (numrolls<0 || numrolls>100) {
        cout << "Error: Invalid number of rolls\n";
        return(1);
    }
   
    // generate and display rolls of dice
    for (i=0; i<numrolls; i++) {
        cout << roll2() << " ";
    }
   
    cout << "\nNormal program termination.\n";
    return 0;
}

/*
    int roll();
   
    Arguments: none
   
    Returns: a random number between 1 and 6 (inclusive)

    This function generates a simulated random roll
    of a die.
*/
int roll() {
    int facevalue = rand() % 6 + 1;
    return facevalue;
}

/*
    int roll2();
   
    Arguments: none
   
    Returns: a random number between 1 and 12 (inclusive)
        which simulates a random roll of a pair of dice

    This function generates a simulated random roll
    of a pair of dice.
*/
int roll2() {
    return roll() + roll();
}

/*
    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();
}