如何通過用戶輸入端while循環

package cst150zzhw4_worst; 

import java.util.Scanner; 

public class CST150zzHW4_worst { 

    public static void main(String[] args) { 
    //Initialize Variables 
    double length; // length of room 
    double width; // Width of room 
    double price_per_sqyd; // Total carpet needed price 
    double price_for_padding; // Price for padding 
    double price_for_installation; // Price for installation 
     String input; // User's input to stop or reset program 
    double final_price; // The actual final price 
     boolean repeat = true; 

    // Create a Scanner object for keyboard input. 
    Scanner keyboard = new Scanner(System.in); 

     while (repeat) 
     { 
     //User Input 

    System.out.println("\n" +"What is the length of the room?: "); 
    length = keyboard.nextInt(); 

    System.out.println("What is the width of the room?: "); 
    width = keyboard.nextInt(); 

    System.out.println("What is the price of the carpet per square yard?: "); 
    price_per_sqyd = keyboard.nextDouble(); 

     System.out.println("What is the price for the padding?: "); 
     price_for_padding = keyboard.nextDouble(); 

     System.out.println("What is the price of the installation?: "); 
     price_for_installation = keyboard.nextDouble(); 

     final_price = (price_for_padding + price_for_installation + price_per_sqyd)*((width*length)/9); 

     keyboard.nextLine(); //Skip the newline 

     System.out.println("The possible total price to install the carpet will be $" + final_price + "\n" + "Type 'yes' or 'no' if this is correct: "); 
     input = keyboard.nextLine(); 

     } 
    } 
}

我將如何使它所以當用戶說是程序停止，如果用戶說沒有那麼程序只是重複？我不知道爲什麼我有這麼多麻煩。我已經搜索了4個多小時。我想只應該使用while循環。如何通過用戶輸入端while循環

來源

2013-09-24 Rick123

你必須在你的while -loop分配repeat所以它成爲false如果用戶說yes：

repeat = !input.equalsIgnoreCase("yes");

來源

2013-09-24 07:16:57

你只需要根據用戶的輸入設置repeat爲true或false。所以最後，將input與yes或no進行比較。像這樣的東西可以爲你工作：

if ("yes".equals(input)) 
repeat = true; // This would continue the loop 
else 
repeat = false; // This would break the infinite while loop

來源

2013-09-24 07:17:20 GoodSp33d

'重複=「是」.equals（輸入）;'......避免分支。 –

@SilviuBurcea它只是代碼可讀性。 – GoodSp33d

你可以使用break語句退出while循環。

while (...) { 

    input = ...; 
    if (input.equals("Y")) { 
    break; 
    } 
}

來源

2013-09-24 07:17:51

不要使用==來比較字符串值 –

對不起......太多C＃編碼對我來說:) –

boolean repeat = true; 

    // Create a Scanner object for keyboard input. 
    Scanner keyboard = new Scanner(System.in); 

    while (repeat) 
    { 
     ----------------------- 
     ------------------------- 
     System.out.println("Do you want to continue:"); 
     repeat = keyboard.nextBoolean(); 
    }

來源

2013-09-24 07:20:23 Prabhakaran

你，如果你還想要你的代碼更加系統化，去搜索有關中斷，特別是線程中斷，以上這些問題的答案是正確的，找到更加有機的代碼並執行它

來源

2013-09-24 07:23:28

如何通過用戶輸入端while循環

回答

相關問題