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package homework4;
import java.util.Scanner;
public class Prog4 {
    static Scanner scanner = new Scanner(System.in);
    public static void main(String[] args) {    
            CreditCardNumber[] cred1;
            CreditCardNumber cred2 = getInput();
            Display("The complete number from your input:", cred2);
            cred1 = getInputArray();
            DisplayArray(cred1);
            TryAnother(cred1);
    }

    public static CreditCardNumber getInput() {
        String ID;
        String accNum;
        CreditCardNumber tempCred;      
        System.out.printf("Please enter issuer ID:");
        ID = scanner.next();
        System.out.printf("Please enter account number:");
        accNum = scanner.next();
        tempCred = new CreditCardNumber(ID, accNum);
        return tempCred;
    }

    public static void Display(String ch, CreditCardNumber cred2) {
    System.out.println(ch);
    System.out.println(cred2.toString().replaceAll(".{4}", "$0   "));       
}

public static CreditCardNumber[] getInputArray() {
    CreditCardNumber[] tempArray;
    String tempID;
    int size;       
    System.out.printf("Please enter size of the aray:");
    size = scanner.nextInt();
    if(size < 1) {
        size = 1;
    }
    tempArray = new CreditCardNumber[size];
    System.out.printf("Please enter issuer ID:");
    tempID = scanner.next();
    for(int i = 0; i < tempArray.length; i++) {
        tempArray[i] = new CreditCardNumber();
        tempArray[i].CreateCred(tempID);
    }
    return tempArray;
}

public static void DisplayArray(CreditCardNumber[] cred1) {
    for(int i = 0; i< cred1.length; i++) {
        Display("Credit Card # " + i+":" + '\n', cred1[i]);
    }
    System.out.println();
}

public static boolean TryAnother(CreditCardNumber[] cred1) {
    String s;
    System.out.printf("Get more credit card numbers? (n for no):");
    s = scanner.next();
    if(s.charAt(0) != 'N' || s.charAt(0) != 'n') {
        do {
                TryAnother(cred1);
                cred1 = getInputArray();
                DisplayArray(cred1);                
            } while(s.charAt(0) != 'N' || s.charAt(0) != 'n');      
    }
    return false;   
}
}

こんにちは、メソッドのdo-whileループに問題がTryAnotherあります。なんらかの理由でコードを繰り返そうとしていますが、do whileループの条件が終了する必要があると言ったときにプロセスが終了しません。また、次の行を繰り返します。ユーザーに「はい」または「いいえ」を入力するよう伝えます。

何かのようなもの：

Please enter issuer ID:321321 
Please enter account number:654654654 
The complete number from your input: 
3213 2165 4654 6549
Please enter size of the aray:7 
Please enter issuer ID:789789 
Credit Card # 0:
7897 8985 6852 9257
Credit Card # 1:
7897 8917 0678 9958
Credit Card # 2:
7897 8900 5781 0934
Credit Card # 3:
7897 8949 2244 6098
Credit Card # 4:
7897 8941 3828 4895
Credit Card # 5:
7897 8965 9233 5006
Credit Card # 6:
7897 8981 8442 5880
Get more credit card numbers? (n for no):n
Get more credit card numbers? (n for no):n
Get more credit card numbers? (n for no):no
Get more credit card numbers? (n for no):

no と入力するとわかるように、同じ文を繰り返し続けます。私が望むのは、配列サイズの文を入力してから繰り返すことです。どうすればこれを行うことができますか?

4

1 に答える 1

2

これを変える：

    }while(s.charAt(0) != 'N' || s.charAt(0) != 'n');

に：

    }while(s.charAt(0) != 'N' && s.charAt(0) != 'n');
于 2012-11-18T08:50:10.800 に答える