在 while 循环中声明字符串变量，而不是在整个循环中循环 - java

Question

我被困在一个应该声明一个名为"phrase"的字符串变量的部分，它不应该一直循环。

为了给你一个想法，我的任务是：与选项 1 类似，只是用户在完成输入第一个团队的结果时输入"N"(而不是"Q"(。 然后，程序输入第二个团队名称及其结果，直到输入"Q"。 输出两个语句，如选项 1 中的语句，后跟第三个语句，说明哪个团队排名第一(基于点数(

示例输入：

2
Toronto
W
W
L
O
W
O
W
N
Montreal // how would I make this appear in the same while loop?
L
L
O 
L
L
W
L
L
Q

示例输出：

Toronto has played 7 games and has earned 10 points
Montreal has played 8 games and has earned 3 points
Toronto is in first place by 7 points

更新：

我的代码：

else if (option == 2){
int counter = 0;
int totalpoints = 0;
String phrase = keyboard.next();
while(go){
String letter = keyboard.next();
if (letter.equals("W")){
pointsW++;
}
else if (letter.equals("L")){
pointsL++;
}
else if (letter.equals("O")){
pointsO++;
}
counter++;
if (letter.equals("N")){
totalpoints = pointsW + pointsL + pointsO;
counter--;
go = false;
}
}
int counter2 = 0;
int totalpoints2 = 0;
pointsW = 2;
pointsL = 0;
pointsO = 1;
String phrase2 = keyboard.next();
while (go2){
String letter2 = keyboard.next();
if (letter2.equals("W")){
pointsW++;
}
else if (letter2.equals("L")){
pointsL++;
}
else if (letter2.equals("O")){
pointsO++;
}
counter2++;
if (letter2.equals("Q")){
counter2--;
totalpoints2 = pointsW + pointsL + pointsO;
go2 = false;
}
}
System.out.println(phrase + " has played "+counter+" games and has earned "+totalpoints+" points");
System.out.println(phrase2 + " has played "+counter2+" games and has earned "+totalpoints2+" points");
if (totalpoints > totalpoints2){
System.out.println(phrase + " is in first place by "+(totalpoints - totalpoints2) + " points");
}else{
System.out.println(phrase2 + " is in first place by "+(totalpoints2 - totalpoints) + " points");
}
}

示例输入：

2
Toronto
W
W
L
O
W
O
W
N
Montreal 
L
L
O 
L
L
W
L
L
Q

问题：这是我得到的输出"蒙特利尔打了 8 场比赛，获得了 11 分"，而它应该是"蒙特利尔打了 8 场比赛并获得了 3 分">

我得到的输出

<小时 />

Answer 1

1. 您可以对单个点重用相同的变量，即pointsW和pointsO，因为您不希望将其值保留到发布结果的末尾。循环条件的变量也是如此，即go和用于输入输赢的变量，即letter.

2. 您将需要数组或不同的变量来存储总分、计数和团队名称。

   import java.util.Scanner;
   public class Standings {
   public static void main(String[] args) {
   Scanner keyboard = new Scanner(System.in);
   int option = keyboard.nextInt();
   int pointsW = 0;
   int pointsO = 0;
   String letter;
   boolean go = true;
   if (option == 2) {
   // Variables for total points, counting, and name for the first team
   int playedGamesTeamOne = 0;
   int teamOnePoints = 0;
   String teamOneName = keyboard.next();
   while (go) {
   letter = keyboard.next();
   if (letter.equals("W")) {
   pointsW += 2;
   } else if (letter.equals("O")) {
   pointsO++;
   }
   playedGamesTeamOne++;
   if (letter.equals("N")) {
   teamOnePoints = pointsW + pointsO;
   playedGamesTeamOne--;
   go = false;
   }
   }
   // Reset common variables
   go = true;
   pointsW = 0;
   pointsO = 0;
   // Variables for total points, counting, and name for the second team
   int playedGamesTeamTwo = 0;
   int teamTwoPoints = 0;
   String teamTwoName = keyboard.next();
   while (go) {
   letter = keyboard.next();
   if (letter.equals("W")) {
   pointsW += 2;
   } else if (letter.equals("O")) {
   pointsO++;
   }
   playedGamesTeamTwo++;
   if (letter.equals("Q")) {
   teamTwoPoints = pointsW + pointsO;
   playedGamesTeamTwo--;
   go = false;
   }
   }
   System.out.println(teamOneName + " has played " + playedGamesTeamOne + " games and has earned "
   + teamOnePoints + " points");
   System.out.println(teamTwoName + " has played " + playedGamesTeamTwo + " games and has earned "
   + teamTwoPoints + " points");
   if (teamOnePoints > teamTwoPoints) {
   System.out
   .println(teamOneName + " is in first place by " + (teamOnePoints - teamTwoPoints) + " points");
   } else {
   System.out
   .println(teamTwoName + " is in first place by " + (teamTwoPoints - teamOnePoints) + " points");
   }
   }
   }
   }
   

   运行示例：

   2
   Toronto
   W
   W
   L
   O
   W
   O
   W
   N
   Montreal 
   L
   L
   O
   L
   L
   W
   L
   L
   Q
   Toronto has played 7 games and has earned 10 points
   Montreal has played 8 games and has earned 3 points
   Toronto is in first place by 7 points
   

Answer 2

您可以将此代码用于选项二

Scanner keyboard = new Scanner(System.in);
int teamCounter = 1;
//String[] teamsNames = new String[2];
String teamOneName="";
String teamTwoName="";
//int[] playedGames = new int[2];
int playedGamesTeamOne = 0;
int playedGamesTeamTwo = 0;
//int[] points = new int[2];
int teamOnePoints = 0;
int teamTwoPoints = 0;
boolean firstTimeTeam1 = true;
boolean firstTimeTeam2 = true;
while (teamCounter <= 2) {
if (teamCounter == 1) {
if (firstTimeTeam1) {
teamOneName = keyboard.nextLine();
firstTimeTeam1 = false;
}
String letter = keyboard.next();
if (letter.equals("W")) {
teamOnePoints += 2;
playedGamesTeamOne++;
} else if (letter.equals("L")) {
playedGamesTeamOne++;
} else if (letter.equals("O")) {
teamOnePoints += 1;
playedGamesTeamOne++;
} else if (letter.equals("N")) {
teamCounter++;
}

} else {
if (firstTimeTeam2) {
teamTwoName = keyboard.next();
firstTimeTeam2 = false;
}
String letter = keyboard.next();
if (letter.equals("W")) {
teamTwoPoints += 2;
playedGamesTeamTwo++;
} else if (letter.equals("L")) {
playedGamesTeamTwo++;
} else if (letter.equals("O")) {
teamTwoPoints += 1;
playedGamesTeamTwo++;
} else if (letter.equals("Q")) {
teamCounter++;
}
}
}
System.out.println(teamOneName + " has played " + playedGamesTeamOne + " games and has earned " + teamOnePoints + " points");
System.out.println(teamTwoName + " has played " + playedGamesTeamTwo + " games and has earned " + teamTwoPoints + " points");
if (teamOnePoints > teamTwoPoints) {
System.out.println(teamOneName + " is in first place by " + (teamOnePoints-teamTwoPoints) + " points");
} else {
System.out.println(teamTwoName + " is in first place by " + (teamTwoPoints-teamOnePoints) + " points");
}