Random Numbers, Games, and Simulation - Advanced Topics in Java: Core Concepts in Data Structures - page 171

Program P6.4
import java.util.*;
public class Nim {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.printf("\nNumber of matches on the table? ");
int remain = in.nextInt();
System.out.printf("Maximum pickup per turn? ");
int maxPick = in.nextInt();
playGame(in, remain, maxPick);
} //end main
public static void playGame(Scanner in, int remain, int maxPick) {
int userPick;
System.out.printf("\nMatches remaining: %d\n", remain);
while (true) { //do forever...well, until the game ends
do {
System.out.printf("Your turn: ");
userPick = in.nextInt();
if (userPick > remain)
System.out.printf("Cannot pick up more than %d\n", Math.min(remain, maxPick));
else if (userPick < 1 || userPick > maxPick)
System.out.printf("Invalid: must be between 1 and %d\n", maxPick);
} while (userPick > remain || userPick < 1 || userPick > maxPick);
remain = remain - userPick;
System.out.printf("Matches remaining: %d\n", remain);
if (remain == 0) {
System.out.printf("You lose!!\n"); return;
}
if (remain == 1) {
System.out.printf("You win!!\n"); return;
}
int compPick = bestPick(remain, maxPick);
System.out.printf("I pick up %d\n", compPick);
remain = remain - compPick;
System.out.printf("Matches remaining: %d\n", remain);
if (remain == 0) {
System.out.printf("You win!!\n");
return;
}
if (remain == 1) {
System.out.printf("I win!!\n");
return;
}
} //end while (true)
} //end playGame