想要更改ASCII while to do~while and for

Question

import java.util.Scanner;

public class ASCII {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);

        String s;
        char c;

        while(true){
            System.out.println("insert letters. (insert # exit)");
            s = scan.next();
            c = s.charAt(0);
            if(c == '#')
                break;
            System.out.print(c + " ASCII code " + (int)c + "end");
        }
        scan.close();
    }
}

我想改变一下做什么~什么时候做什么。我试过了，但我不知道如何更改if部分。

Answer 1

你的问题不是很清楚，但也许这就是你所想的：

public class Program {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        String s;
        char c;
        do {
            System.out.println("insert letters. (insert # exit)");
            s = scan.next();
            c = s.charAt(0);
            System.out.print(c + " ASCII code " + (int)c + " end \n");
        } while(c != '#');
        scan.close();
    }
}

Answer 2

Java中有Do- while循环：

do{
            System.out.println("insert letters. (insert # exit)");
            s = scan.next();
            c = s.charAt(0);
            if(c == '#')
                break;
            System.out.print(c + " ASCII code " + (int)c + "end");
        }while(true);