Java大学基础教程（英文第六版）课后第六章自测题答案

importjava.util.Random; importjava.util.Scanner;

public class P224_6$32 { public static void main(String[] args) { // TODO Auto-generated method stub P224_6$32 ans = new P224_6$32(); int n3 = ans.question(); boolean flag = true; int correct = 0; //int wrong = 0; for (inti = 1; i<= 10; i++) { if (flag == false) { flag = ans.judge(n3); //wrong++; } else if (flag == true) { //n3 = ans.question(n1, n2); flag = ans.judge(n3); correct++; } } if (((double) correct / 10) <= 0.75) { System.out.print(\ } } publicboolean judge(int n3) { boolean flag = true; Scanner input = new Scanner(System.in); intinputn = input.nextInt(); //Random rand = new Random(); //int n = rand.nextInt(4); if (n3 == inputn) { //switch (n) { //case 0: System.out.print(\ //break; /* case 1: System.out.print(\ break; case 2:

/* }

}

System.out.print(\ break; case 3: System.out.print(\ break; }*/ flag = true;

} else if (n3 != inputn) { /*switch (n) { case 0:*/ System.out.print(\ break; case 1: System.out.print(\ break; case 2: System.out.print(\ break; case 3: System.out.print(\ break; }*/ System.out.print(\ flag = false; }

return flag;

publicint question() { Random rand = new Random(); int n1 = rand.nextInt(10); int n2 = rand.nextInt(10); }

System.out.printf(\System.out.print(\int n3 = n1 * n2; return n3;

importjava.util.*;

publicclass P225_6$33 { publicstaticvoid main(String[] args) { // TODO Auto-generated method stub System.out.print(\); P225_6$33 play = new P225_6$33(); int n = play.generateRand(); Scanner input = newScanner(System.in); intinputn = input.nextInt(); do { if (n inputn) System.out.print(\); System.out.print(\); inputn = input.nextInt(); } while (n != inputn); if (n == inputn){ System.out.print(\); System.out.print(\you want to continue this game, restart please\); } } publicintgenerateRand() { Random ran = newRandom(); int n = 1 + ran.nextInt(1001); return n; } }

importjava.util.Random; importjava.util.Scanner;

public class P225_6$34 { public static void main(String[] args) { // TODO Auto-generated method stub System.out.print(\ P225_6$34 play = new P225_6$34(); int n = play.generateRand(); Scanner input = new Scanner(System.in); intinputn = input.nextInt(); int frequency = 0; do { if (n inputn) System.out.print(\ frequency++; System.out.print(\ inputn = input.nextInt(); if (frequency <= 10) { System.out .print(\ } } while (n != inputn); if (n == inputn) { System.out.print(\ System.out .print(\ } if (frequency < 10) { System.out.print(\ } else System.out.print(\ } publicintgenerateRand() { Random ran = new Random(); int n = 1 + ran.nextInt(1001);