我试图让程序在总数达到10时结束，但由于某种原因，我的while循环在它达到10时继续计数。我有百分之百的百分比来找到10个问题的答案。
import java.util.*;
类CAI { 私有静态扫描仪输入;
public static void main(String[] arguments) {
menu();// calls menu method
compute();// calls compute method
}
public static void menu() {// method that displays menu
System.out.println(" CAI MENU ");
System.out.println("\n)");
System.out
.println("\n1) DIFFICULTY 1\n2) DIFFICULTY 2\n3) DIFFICULTY 3\n4) DIFFICULTY 4");
}
public static int[] Blop() {
Random rand = new Random();
int arr[] = new int[8];
arr[0] = rand.nextInt(9);
arr[1] = rand.nextInt(9);
arr[2] = rand.nextInt(99);
arr[3] = rand.nextInt(99);
arr[4] = rand.nextInt(999);
arr[5] = rand.nextInt(999);
arr[6] = rand.nextInt(9999);
arr[7] = rand.nextInt(9999);
return arr;
}
public static void compute() {
int difficulty;
input = new Scanner(System.in);
System.out.println("Enter an option: ");
difficulty = input.nextInt();
int total = 0;
int percent = 0;
while (total <= 10) {
if (difficulty == 1) {
int num[] = new int[2];
int ans;
String choice;
do {
num = Blop();
do {
System.out.print("How much is " + num[0] + " times "
+ num[1] + " ? :");
total++;
System.out.print(total);
ans = input.nextInt();
String Correct;
String Wrong;
String[] correct = { "Very good! ", "Excellent! ",
"Nice work! ", "Keep up the good work! " };
String[] wrong = { "No. Please try again. ",
"Wrong. Try once more. ", "Don’t give up! ",
"No. Keep trying " };
Random rand = new Random();
Correct = correct[rand.nextInt(correct.length)];
Wrong = wrong[rand.nextInt(wrong.length)];
if (ans == (num[0] * num[1])) {
System.out.print(Correct);
percent++;
} else {
System.out.print(Wrong);
}
} while (ans != (num[0] * num[1]));
System.out.print("Do you want more questions(yes/no) :");
input.nextLine();
choice = input.nextLine();
} while (choice.equalsIgnoreCase("yes"));
}
}
if (difficulty == 2) {
int num[] = new int[2];
int ans;
String choice;
do {
num = Blop();
do {
System.out.print("How much is " + num[2] + " times "
+ num[3] + " ? :");
ans = input.nextInt();
String Correct;
String Wrong;
String[] correct = { "Very good! ", "Excellent! ",
"Nice work! ", "Keep up the good work! " };
String[] wrong = { "No. Please try again. ",
"Wrong. Try once more. ", "Don’t give up! ",
"No. Keep trying " };
Random rand = new Random();
Correct = correct[rand.nextInt(correct.length)];
Wrong = wrong[rand.nextInt(wrong.length)];
if (ans == (num[2] * num[3])) {
System.out.print(Correct);
} else {
System.out.print(Wrong);
}
} while (ans != (num[2] * num[3]));
System.out.print("Do you want more questions(yes/no) :");
input.nextLine();
choice = input.nextLine();
} while (choice.equalsIgnoreCase("yes"));
}
if (difficulty == 3) {
int num[] = new int[2];
int ans;
String choice;
do {
num = Blop();
do {
System.out.print("How much is " + num[4] + " times "
+ num[5] + " ? :");
ans = input.nextInt();
String Correct;
String Wrong;
String[] correct = { "Very good! ", "Excellent! ",
"Nice work! ", "Keep up the good work! " };
String[] wrong = { "No. Please try again. ",
"Wrong. Try once more. ", "Don’t give up! ",
"No. Keep trying " };
Random rand = new Random();
Correct = correct[rand.nextInt(correct.length)];
Wrong = wrong[rand.nextInt(wrong.length)];
if (ans == (num[4] * num[5])) {
System.out.print(Correct);
} else {
System.out.print(Wrong);
}
} while (ans != (num[4] * num[5]));
System.out.print("Do you want more questions(yes/no) :");
input.nextLine();
choice = input.nextLine();
} while (choice.equalsIgnoreCase("yes"));
}
if (difficulty == 4) {
int num[] = new int[2];
int ans;
String choice;
do {
num = Blop();
do {
System.out.print("How much is " + num[6] + " times "
+ num[7] + " ? :");
ans = input.nextInt();
String Correct;
String Wrong;
String[] correct = { "Very good! ", "Excellent! ",
"Nice work! ", "Keep up the good work! " };
String[] wrong = { "No. Please try again. ",
"Wrong. Try once more. ", "Don’t give up! ",
"No. Keep trying " };
Random rand = new Random();
Correct = correct[rand.nextInt(correct.length)];
Wrong = wrong[rand.nextInt(wrong.length)];
if (ans == (num[6] * num[7])) {
System.out.print(Correct);
} else {
System.out.print(Wrong);
}
} while (ans != (num[6] * num[7]));
System.out.print("Do you want more questions(yes/no) :");
input.nextLine();
choice = input.nextLine();
} while (choice.equalsIgnoreCase("yes"));
}
System.out.print(100 / 10 * percent);
}
}
答案 0 :(得分：1)
宣布你的while循环： “虽然总数小于或等于10”
这意味着它将在10点再次运行。
只要总计<10
编辑：你也不会在任何地方增加总数。
total++;
会做到的。
编辑：看来你做了。对不起代码很难在手机上阅读。
答案 1 :(得分：0)
这种情况可能有多种原因。其中一个原因是，如果变量难度不等于1（这个变量在你的代码中也找不到），则总数将永远不会增加，因此第一个while循环将永远持续。因为您还没有共享所有代码，所以ans != (num[0] * num[1]永远不会是真的，因此，最内层的do / while循环将永久执行。如果您发布其余代码，我们将能够为您提供更多帮助
编辑：好的，谢谢。看起来你的问题是因为当用户继续得到错误的问题时，他们无法逃脱内部while循环，因此无法逃脱外部while循环。对此的解决方案很简单，只需将while (ans != (num[4] * num[5]));更改为ans != (num[0] * num[1]) && total < 10，从而在用户提出错误的问题时为代码提供一种逃避方法。