敏捷软件开发：原则、模式与实践 一次编程实践 保龄球记分代码

//类Score
package com.java.bowlingscore;
public class Scorer {
public void addThrow(int pins){
itsThrows[itsCurrentThrow++]=pins;
}
public int scoreForFrame(int theFrame){  
int score = 0;
ball = 0;
for(int currentFrame=0;currentFrame<theFrame;
currentFrame++){
if(strike()){
score +=10 + nextTwoBallsForStrike();
ball++;
}else if(spare()){
 score+=10+nextBallForSpare();
 ball+=2;
}else{
score +=twoBallsInFrame();
ball+=2;
}
}
return score;
}
private boolean strike(){
return itsThrows[ball]==10;
}
private boolean spare() {
return (itsThrows[ball]+itsThrows[ball+1]==10);
}
private int nextTwoBallsForStrike(){
return itsThrows[ball+1]+itsThrows[ball+2];
}
private int nextBallForSpare(){
return itsThrows[ball+2];
}
private int twoBallsInFrame(){
return itsThrows[ball]+itsThrows[ball+1];
}
private int ball;
private int[] itsThrows = new int[21];
private int itsCurrentThrow=0;
}//类Score
package com.java.bowlingscore;