<分区>
class Noob1 {
public static void main(String args[])
throws java.io.IOException{
char ch, answer;
answer = 'g';
do {
System.out.println("Guess from A-L:");
ch = (char) System.in.read();
if(ch == answer){
System.out.println("Congratz!");
} else System.out.println("Try again!");
} while (ch != answer);
}
}
输出是这样的:
Guess from A-L:
a
Try again!
Guess from A-L:
Try again! // this is where intuitively it should ask for input again
Guess from A-L:
Try again!
Guess from A-L:
g // input is skipped a few times
Congratz!
我不明白为什么，我正在读一本面向初学者的书，应该涵盖所有内容，我错过了什么？
在循环末尾添加下面的代码确认它正在循环但输入以某种方式被跳过。
i++;
System.out.println(i);
所以我用这个让它工作:
import java.io.*;
class Noob1
{
public static void main(String args[]) throws java.io.IOException
{
char ch, answer;
String tmp;
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
answer = 'g';
do
{
System.out.println("Guess character followed by ENTER:");
tmp = bufferedReader.readLine();
ch = tmp.charAt(0); // only first char is considered
if (ch == answer)
System.out.println("Gratz! the answer was: " + ch + "!");
else
System.out.println("Nope, try again..");
} while (ch != answer);
}
}
格式仍然很糟糕吗？