保龄球-----计分程序

public class BowlingGame {
public static final int TOTAL_ROUND = 10;	// 总局数

private int[] scores;						// 记录每局得分的数组
private int[][] numberOfHits;				// 记录每局两球击倒瓶子个数的数组
private int lastOneHit, lastTwoHit;			// 最后两次击球
private int totalScore;						// 总成绩

private int currentRound;					// 当前第几局
private boolean firstHit;					// 是否是每局的第一次击球

public BowlingGame() {
scores = new int[TOTAL_ROUND];
numberOfHits = new int[TOTAL_ROUND][2];
firstHit = true;
}

/**
* 扔出一颗球
* @param num 打倒瓶子的数量
*/
public void throwTheBall(int num) {
if(firstHit) {	// 第一颗	球
numberOfHits[currentRound][0] = num;
if(num != 10) {
firstHit = false;	// 第一颗球没有全中则要打第二颗
}
else {
currentRound += 1;	// 第一颗球全中直接进入下一局
}
}
else {
numberOfHits[currentRound][1] = num;
currentRound += 1;		// 打完第二颗球进入下一局
firstHit = true;		// 准备投掷下一局的第一颗球
}
}

public void calcScore() {
// from round 1 to round 9
for(int i = 0; i < numberOfHits.length - 1; i++) {
if(numberOfHits[i][0] == 10) {	// Strike(全中)
scores[i] += 10;
if(numberOfHits[i + 1][0] == 10) {
scores[i] += 10;
if(i < 8) {
scores[i] += numberOfHits[i + 2][0];
}
else {
scores[i] += lastOneHit;
}
}
else {
scores[i] += numberOfHits[i + 1][0] + numberOfHits[i + 1][1];
}
}
else if(numberOfHits[i][0] + numberOfHits[i][1] == 10) { // Spare(补中)
scores[i] += 10;
scores[i] += numberOfHits[i + 1][0];
}
else {
scores[i] += numberOfHits[i][0] + numberOfHits[i][1];
}
}
// the last round
if(numberOfHits[9][0] == 10) {
scores[9] += 10;
scores[9] += lastOneHit + lastTwoHit;
}
else if(numberOfHits[9][0] + numberOfHits[9][1] == 10) {
scores[9] += 10;
scores[9] += lastOneHit;
}
else {
scores[9] += numberOfHits[9][0] + numberOfHits[9][1];
}
}

/**
* 设置最后第一球击倒瓶子数
* @param num 击倒瓶子数
*/
public void setLastOneHit(int num) {
this.lastOneHit = num;
}

/**
* 设置最后第二球击倒瓶子数
* @param num 瓶子数
*/
public void setLastTwoHit(int num) {
this.lastTwoHit = num;
}

/**
* 计算总分数
* @return 总分数
*/
public int getTotalScore() {
for(int i = 0; i < scores.length; i++) {
totalScore += scores[i];
}
return totalScore;
}

/**
* 获得指定局数的累积得分
* @param round 局数
* @return 从第一局到指定局数的累积得分
*/
public int getScoreByRound(int round) {
int sum = 0;
for(int i = 0; i <= round; i++) {
sum += scores[i];
}
return sum;
}
}

<pre name="code" class="java">import java.text.DecimalFormat;import java.util.Scanner;public class KaiDa {public static void main(String[] args) {DecimalFormat formatter = new DecimalFormat("00");Scanner sc = new Scanner(System.in);int firstHit = 0, secondHit = 0;BowlingGame game = new BowlingGame();for(int i = 0; i < BowlingGame.TOTAL_ROUND; i++) {System.out.println("=====第" + formatter.format(i + 1) + "回合=====");System.out.print("第一次击中: ");firstHit = sc.nextInt();game.throwTheBall(firstHit);if(firstHit < 10) {	// 第一次没有全中就要打第二颗System.out.print("第二次击中: ");secondHit = sc.nextInt();game.throwTheBall(secondHit);}if(i == BowlingGame.TOTAL_ROUND - 1) {// 第十局如果全中或补中则要继续投掷球if(firstHit == 10 || firstHit + secondHit == 10) {System.out.print("加一球: ");int lastOne = sc.nextInt();game.setLastOneHit(lastOne);if(firstHit == 10) {	// 第一颗球全中则还要再投掷一颗球System.out.print("加二球: ");int lastTow = sc.nextInt();game.setLastTwoHit(lastTow);}}}}game.calcScore();	// 计算成绩// 打印每一局的累积得分for(int i = 0; i < BowlingGame.TOTAL_ROUND; i++) {System.out.print(game.getScoreByRound(i) + "\t");}System.out.println("\n总分: " + game.getTotalScore());	// 打印总分数sc.close();}}