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java语言的科学与艺术 第六章 课后编程
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1、
package SixthCharter;
/*
* File: Poker.java
* ---------------------------
* 这是第6章的第一题
* Author luoriver
*/
import acm.program.*;
import acm.util.*;
public class Poker extends ConsoleProgram {
public void run(){
println("这个程序是随机显示选择的扑克");
while(true){
println();
int i = readInt();
showPoker();
if (i==2) break;
}
}
/*
* 显示随机的扑克牌
*/
private void showPoker(){
int num = rgen.nextInt(1,13);
// rgen.setSeed(2);
switch(num){
case 1:
print("Ace"); break;
case 11:
print("Jack"); break;
case 12:
print("Queen"); break;
case 13:
print("King"); break;
default: print(num);
}
print(" of ");
int color = rgen.nextInt(1,4);
switch(color){
case 1:
print ("Spades"); break;
case 2:
print("Diamonds"); break;
case 3:
print("Clubs"); break;
case 4:
print("Hearts"); break;
}
}
/*create an instance variable for the random number generator
*/
private RandomGenerator rgen =RandomGenerator.getInstance();
}2、
package SixthCharter;
/*
* File: TossCoin.java
* ---------------------------
* 这是第6章的第2题
* Author luoriver
*/
import acm.program.*;
import acm.util.*;
public class TossCoin extends ConsoleProgram {
public void run(){
println("这个程序是抛硬币，一直抛到出现3个连续的下面为止，并显示被抛的总次数：");
int toss_num = 0;
//设置检查点,是否到了连续的次数
int n = 0;
while(n < CHECK_NUM){
tossCoin();
toss_num ++;
if(tossCoin().equals("Head")){
println("Head");
n++;
}else{
println("Tails");
n = 0;
}
}
println("一共运行了" + toss_num + "次。");
}
/**
* 这里是进行的投币方法
*/
private String tossCoin(){
int n = rgen.nextInt(1, 2);
return returnContent(n);
}
/**
* 这里是显示返回硬币的哪一面
* @Head
* @Tails
*/
private String returnContent(int num){
if(num == 1){
return "Head";
}else{
return "Tails";
}
}
/*create an instance variable for the random number generator
*/
private RandomGenerator rgen =RandomGenerator.getInstance();
private static final int CHECK_NUM = 3;
}3、
package SixthCharter;
/*
* File: ThrowDart.java
* ---------------------------
* 这是第6章的第3题
* Author luoriver
*/
import acm.program.*;
import acm.graphics.*;
import acm.util.*;
public class ThrowDart extends ConsoleProgram {
public void run(){
println("这个程序来用投镖来模拟正方形与圆形的面积之比是一个近似的 PI值：");
double SquareArea = 4 * (R * R);
double CircleArea = PI * (R * R);
println("圆形与正方形的面积之比为" + CircleArea / SquareArea);
println("投镖时落在圆形与正方形内的次数之比为" + throwDart());
//println(3.14/4);
//throwDart();
}
private double throwDart(){
double circlenum = 0;
double squarenum = 0;
while(squarenum < ThrowNum){
double rx = rgen.nextDouble(-1.0, 1.0);
double ry = rgen.nextDouble(-1.0, 1.0);
// rgen.setSeed(2);
if(((rx * rx) + (ry * ry)) < 1){
circlenum ++;
squarenum ++;
}else{
squarenum ++;
}
}
println();
println("投在圆形内的次数为" + circlenum);
println("投在正方形内的次数为" +squarenum);
return circlenum / squarenum;
}
/*create an instance variable for the random number generator
*/
private RandomGenerator rgen =RandomGenerator.getInstance();
//设置投镖的次数
private static final int ThrowNum = 10000;
private static final double PI = 3.14;
private static final double R= 1;
}4、
package SixthCharter;
/*
* File: Poker.java
* ---------------------------
* 这是第6章的第一题
* Author luoriver
*/
import acm.program.*;
import acm.util.*;
public class HalfLife extends ConsoleProgram {
public void run(){
println("这个程序是模拟原子的半衰期");
println("There are " + RADIOACTIVE_ACTOM_NUM + "actom initially");
int left_num = RADIOACTIVE_ACTOM_NUM;
int year = 0;
while(left_num > 0){
int new_actom_num = left_halflife_actom_num(left_num);
left_num -= new_actom_num;
year ++;
println("There are " + left_num + " actom at the end of year" + year);
new_actom_num = 0;
}
}
//定义衰减原子的数量
private int left_halflife_actom_num(int num){
int actom_num = 0;
for(int i = num; i > 0; i -- ){
while(rgen.nextBoolean()){
actom_num ++;
break;
}
}
return actom_num;
}
/*create an instance variable for the random number generator
*/
private RandomGenerator rgen =RandomGenerator.getInstance();
/**
* 定义放射性原子的数量
* @RADIOACTIVE_ACTOM_NUM
*/
private static final int RADIOACTIVE_ACTOM_NUM = 10000;
}
5、
package SixthCharter;
/*
* File: Poker.java
* ---------------------------
* 这是第6章的第5题
* Author luoriver
*/
import acm.program.*;
import java.util.Scanner;
import acm.util.*;
public class Bingo extends ConsoleProgram {
public void run() {
/*
* 首先询问是否要介绍下赌博规则，这里以后再写 读取文字不会先用数字代替吧，1代表继续，2代表不玩了
*/
println();
int know_rules = readInt("你想了解赌博机的规则吗？1代表为想了解，2代表已经知道规则：");
if (know_rules == 1) {
println(/*"内容太多，我没有写呢，看看Java语言的科学与艺术第172页吧"*/ RULES);
}
println("开始玩吧！祝玩的愉快!");
start_play();
}
private void start_play(){
int remain_money = CLIENT_INIT_MONEY;
print_remain_money(remain_money);
while(remain_money > 0){
remain_money --;
if(remain_money == 0){
println("");
}
String first_show = show_result();
// print("111111" + first_show);
String second_show = show_result();
// println("22222" + first_show);
String third_show = show_result();
// print("333333333" + first_show);
/*Scanner num = new Scanner(System.in);
int n = num.nextInt();*/
int n = readInt();
if(n == 2) break;
// print_remain_money(remain_money);
if(first_show.equals("BAR") && second_show.equals("BAR") && third_show.equals("BAR")){
remain_money += 250;
println(first_show + " " + second_show + " " + third_show +" you win" );
print_remain_money(remain_money);
}else if(first_show.equals("BELL") && second_show.equals("BELL") && (third_show.equals("BELL") || third_show.equals("BAR"))){
remain_money += 20;
println(first_show + " " + second_show + " " + third_show +" you win" );
print_remain_money(remain_money);
}else if(first_show.equals("PLUM") && second_show.equals("PLUM") && (third_show.equals("PLUM") || third_show.equals("BAR"))){
remain_money += 14;
println(first_show + " " + second_show + " " + third_show +" you win" );
print_remain_money(remain_money);
}else if(first_show.equals("ORANGE") && second_show.equals("ORANGE") && (third_show.equals("ORANGE") || third_show.equals("BAR"))){
remain_money += 10;
println(first_show + " " + second_show + " " + third_show +" you win" );
print_remain_money(remain_money);
}else if(first_show.equals("CHERY") && second_show.equals("CHERY") && third_show.equals("CHERY")){
remain_money += 7;
println(first_show + " " + second_show + " " + third_show +" you win" );
print_remain_money(remain_money);
}else if(first_show.equals("CHERY") && second_show.equals("CHERY")){
remain_money += 5;
println(first_show + " " + second_show + " " + third_show +" you win" );
print_remain_money(remain_money);
}else if(first_show.equals("CHERY")){
remain_money += 2;
println(first_show + " " + second_show + " " + third_show +" you win" );
print_remain_money(remain_money);
}else{
println(first_show + " " + second_show + " " + third_show +" you loss" );
print_remain_money(remain_money);
}
}
// print_remain_money(remain_money);
}
private void print_remain_money(int remain){
println("you have $" + remain + " would you like to play?");
}
private String show_result() {
int random_show = rgen.nextInt(1, 6);
switch (random_show) {
case 1:
return "BAR";
case 2:
return "LEMON";
case 3:
return "ORANGE";
case 4:
return "PLUM";
case 5:
return "BELL";
default:
return "CHERRY";
}
}
/*
* 设定系统给用户初始钱
*/
private static final int CLIENT_INIT_MONEY = 50;
/*
* create an instance variable for the random number generator
*/
private RandomGenerator rgen = RandomGenerator.getInstance();
private static final String RULES= "典型的赌博机有3个轮子，他们在一个狭窄的窗口后面旋转。每个轮子都标记为CHERRY、LEMON、ORANGE、PLUM、BELL和BAR。然而，窗口每次只允许看到一个轮子的一个符号。"
+"下面显示的是典型的获胜模式及其相关回报："
+"BAR BAR BAR -- 支付 $250"
+ "BELL BELL BELL/BAR -- 支付 $20"
+ "PLUM PLUM PLUM/BAR -- 支付 $14"
+ "ORANGE - ORANGE - ORANGE/BAR -- 支付 $10"
+ "CHERRY - CHERRY - CHERRY -- 支付 $7"
+ "CHERRY - CHERRY - -- -- 支付 $5"
+ "CHERRY - CHERRY - -- -- 支付 $2";
};
6、7合并了
package SixthCharter;
/*
* File: Poker.java
* ---------------------------
* 这是第6章的第5题
* Author luoriver
*/
import acm.program.*;
import java.util.Scanner;
import acm.util.*;
public class Calculate extends ConsoleProgram {
public void run() {
int first = rgen.nextInt(0, 20);
int second = rgen.nextInt(0, 20);
sys_question(first, second);
}
/*
* 定义系统提出问题的方法
*/
private void sys_question(int first, int second) {
for (int i = 0; i < PROBLEM_NUM; i++) {
first = rgen.nextInt(0, 20);
second = rgen.nextInt(0, 20);
int sys_answer = first + second;
if (sys_answer <= 20) {
print(first + " + " + second + " = ");
answer(sys_answer);
} else {
i--;
}
}
}
/*
* 定义学生回答的方法
*/
private void answer(int sys_answer) {
int student_answer = readInt();
if (student_answer == sys_answer) {
println(success());
} else {
for (int i = 0; i < ANSWER_NUM; i++) {
println("答案不正确，请再输入一遍");
student_answer = readInt();
}
println("正确答案是" + sys_answer);
}
}
/*
* 显示输入正确答案后的鼓励信息
*/
private String success() {
int n = rgen.nextInt(1, 3);
switch (n) {
case 1:
return "You got it";
case 2:
return "connect";
default:
return "That's the answer";
}
}
/*
* create an instance variable for the random number generator
*/
private RandomGenerator rgen = RandomGenerator.getInstance();
/*
* 定义出题的个数
*/
private static final int PROBLEM_NUM = 5;
/*
* 定义学生错误回答问题的次数
*/
private static final int ANSWER_NUM = 3;
}8、
package SixthCharter;
/*
* File: Poker.java
* ---------------------------
* 这是第6章的第9题
* Author luoriver
*/
import acm.program.*;
import acm.util.*;
public class NewPoker extends ConsoleProgram {
public void run(){
println("这个程序是随机显示选择的扑克");
int level = level();
String color = color();
Card show = new Card(level, color);
println();
println("直接显示show类为" + show);
println();
print(show.toString(level, color));
}
public class Card{
public Card (int level, String color){
println("等级是" + level + "花色是" + color);
}
public String toString(int level, String color){
return "toString 方法显示等级为" + level + "花色是" + color;
}
}
public int getLevel(){
return level();
}
public String getColor(){
return color();
}
/*
* 显示随机的扑克牌
*/
private void showPoker(){
int num = rgen.nextInt(1,13);
// rgen.setSeed(2);
switch(num){
case 1:
print("Ace"); break;
case 11:
print("Jack"); break;
case 12:
print("Queen"); break;
case 13:
print("King"); break;
default: print(num);
}
}
private String color(){
int color = rgen.nextInt(1,4);
switch(color){
case 1:
// print("Spades");
return "Spades";
case 2:
// print("Diamonds");
return "Diamonds";
case 3:
// print("Clubs");
return "Clubs";
default:
// print("Hearts");
return "Hearts";
}
}
private int level(){
int n = rgen.nextInt(1, 4);
switch(n){
case 1:
return LEVEL1;
case 2:
return LEVEL2;
case 3:
return LEVEL3;
default:
return LEVEL4;
}
/*private void color(){
int color = rgen.nextInt(1,4);
switch(color){
case 1:
print("Spades");
case 2:
print("Diamonds");
case 3:
print("Clubs");
case 4:
print("Hearts");
}
*/
}
/*create an instance variable for the random number generator
*/
private RandomGenerator rgen =RandomGenerator.getInstance();
/*
* 定义扑克的花色常量
*/
private static final String CLUBS = "CLUBS";
private static final String DIMONDS = "DIMONDS";
private static final String HEARTS = "HEARTS";
private static final String SPADES = "SPADES";
/*
* 定义等级常量的值
*/
private static final int LEVEL1 = 1;
private static final int LEVEL2 = 11;
private static final int LEVEL3 = 12;
private static final int LEVEL4 = 13;
}9、
package SixthCharter;
public class LibaryRecord {
public LibaryRecord(String book_name, String author, int catalog_number, String publisher, int public_date, boolean isCurrent){
this.book_name = book_name;
this.author = author;
this.catalog_number = catalog_number;
this.publisher = publisher;
this.public_date = public_date;
this.isCurrent = isCurrent;
}
public LibaryRecord(String book_name, String author, int catalog_number, String publisher, int public_date){
this.book_name = book_name;
this.author = author;
this.catalog_number = catalog_number;
this.publisher = publisher;
this.public_date = public_date;
isCurrent = true;
}
public String getBookName(){
return book_name;
}
public String getAuthor(){
return author;
}
public int getCatalogNum(){
return catalog_number;
}
public String getPublisher(){
return publisher;
}
public int getPublic_date(){
return public_date;
}
public boolean getisCurrent(){
return isCurrent;
}
public void setisCurrent(boolean isCurrent){
this.isCurrent = isCurrent;
}
@Override
public String toString(){
return "Book_name" + book_name + " author: " + author + " 目录号: " + catalog_number + "出版者" + publisher + " 出版年份: "
+ public_date + " 当前是否流通: " + isCurrent;
}
/*
* 定义书名
*/
private String book_name;
private String author;
private int catalog_number;
private String publisher;
private int public_date;
private boolean isCurrent;
}
10、没有做
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