/* CPP w/o Fear, by Overland.  Exercise 05.03.01.txt, p. 126.  

Write  a   program  that  randomly   selects  from  a  bag   of  eight
objects. Each object can be red, blue, orange, or green, and it can be
a  ball  or a  cube.  Assume  the bag  contains  one  object for  each
combination (one red  ball, one red cube, one  orange ball, one orange
cube, and so on). Write  code similar to dealer1.cpp, using two string
arrays-- one to identify colors and the other to identify shapes.
 
*/

#include <iostream>
#include <stdlib.h>
#include <time.h>
using namespace std;

int rand_0toN1(int n);
void draw_an_item();

char *colors[4] =  {"red", "blue", "orange", "green"};
char *shapes[2] = {"ball", "cube" };

int main() {
    int n, i;

    srand(time(NULL));      // Set seed for random numbers.

    while (1) {
        cout << "Enter no. of items to draw (0 to exit): ";
        cin >> n;
        if (n == 0)
            break;
        for (i = 1; i <= n; i++)
            draw_an_item();
    }
    return 0;
}

// Draw-an-item function
// Performs one item-pick by getting a random 0-4 and a random
//  0-1. These are then used to index the string arrays, colors
//  and shapes
//
void draw_an_item() {
    int c;         // Random index (0 thru 4) into colors array
    int s;         // Random index (0 thru 1) into shapes array

    c = rand_0toN1(4);
    s = rand_0toN1(2);
    cout << colors[c] << " " << shapes[s] << endl;
}

// Random 0-to-N1 Function.
// Generate a random integer from 0 to N-1.
//
int rand_0toN1(int n) {
    return rand() % n;
}