Java 重复局部变量。难住了

Question

已关闭。这个问题是 not reproducible or was caused by typos 。目前不接受答案。

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这个问题是由拼写错误或无法再重现的问题引起的。虽然类似的问题可能是 on-topic在这里，这个问题的解决方式不太可能帮助 future 的读者。

已关闭 4 个月前。

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我是编码新手，正在尝试让我的第二个程序运行。它的作用非常简单，但它在第 24 行“重复局部变量确认”上抛出错误。不太明白为什么它不喜欢我正在做的事情。

Scanner userInput = new Scanner(System.in);  
char confirm;

do{

System.out.println("Welcome to the story teller");
System.out.println("What is your name?");
String name = userInput.nextLine();

System.out.println("How old are you?");
int age = userInput.nextInt();

System.out.println("What country would you like to visit?");
String country = userInput.nextLine();

System.out.println("Great! So your name is" + name + ", you are" + age + "years old and you would like to visit" + country + "?");
System.out.println("Press Y to continue or N to start over");
char confirm = userInput.next().charAt(0);

  if (confirm !='y' || confirm !='n'){
 System.out.println("Sorry that input is not valid, please try again"); 
}
  else {
  System.out.println(name + "landed in" + country + "at the age of" + age + ".");
  }
} while(confirm == 'Y'|| confirm == 'y');

Answer 1

您声明了两次confirm。将第二个声明更改为仅分配给它，您应该没问题:

confirm = userInput.next().charAt(0);
// No datatype, so you aren't declaring confirm, just assigning to it