[英]do-while loop not terminate when answer no
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;
}
}
嗨,我在TryAnother
方法中的do-while
循环中TryAnother
问题,当我输入 no 时,由于某种原因,我试图让代码重复执行,但当do while
循环的条件表示它应该终止时,进程不会终止它还重复告诉用户输入“是”或“否”的行。
就像是:
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):
正如你在我输入 no 时所看到的。 它不断重复同一句话。 我想要的是它从输入数组大小的句子开始重复,我该怎么做?
改变这个:
}while(s.charAt(0) != 'N' || s.charAt(0) != 'n');
到:
}while(s.charAt(0) != 'N' && s.charAt(0) != 'n');
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