我是編程新手，我開始練習 Java。在我的練習中，我要求編寫一個程序來計算并打印出一個數字的數字之和。然后它打印出和數的所有除數。問題是在那之后，我需要問用戶他們是否想嘗試另一個號碼，并且當這個人回答“是”時我無法重新啟動程序。謝謝你，對不起我的英語！//Introduction System.out.println("\nWelcome to our Calculation Program!\n----------------------------------------"); System.out.print("Enter a number with at most 7-digits:"); int input = mykeyboard.nextInt(); int sum = 0; while (input > 0) { int add = input % 10; sum = sum + add; input = input / 10; } System.out.println("Sum of the digits of your input is: " + sum); System.out.print("The divisors of " + sum + " are as follows: " ); for (int counter = 1; sum >= counter; counter++) { if (sum % counter == 0) System.out.print(counter + " "); } System.out.println("\n\nDo you want to try another number?"); Scanner mykeyboard2 = new Scanner(System.in); String choice = mykeyboard2.nextLine(); if (choice.equals("yes")) { System.out.println("Enter a number with a most 7-digits:"); while (input > 0); int add = input % 10; sum = sum + add; input = input / 10; System.out.println("Sum of the digits of your input is: " + sum); System.out.print("The divisors of " + sum + " are as follows: " ); for (int counter = 1; sum >= counter; counter++) if (sum % counter == 0) System.out.print(counter + " ");} if (choice.equals("no")) {System.out.println("Thanks and Have a Great Day!");
3 回答
largeQ
TA貢獻2039條經驗 獲得超8個贊
while (input > 0);
這將進入無限循環。我想你把一個;而不是{.
應該 while (input > 0){
編輯：
System.out.println("\nWelcome to our Calculation Program!\n----------------------------------------");
while(true){
System.out.print("Enter a number with at most 7-digits:");
int input = mykeyboard.nextInt();
int sum = 0;
while (input > 0) {
int add = input % 10;
sum = sum + add;
input = input / 10;
}
System.out.println("Sum of the digits of your input is: " + sum);
System.out.print("The divisors of " + sum + " are as follows: " );
for (int counter = 1; sum >= counter; counter++) {
if (sum % counter == 0)
System.out.print(counter + " ");
}
System.out.println("\n\nDo you want to try another number?");
Scanner mykeyboard2 = new Scanner(System.in);
String choice = mykeyboard2.nextLine();
if (choice.equals("no")) {
break;
}
}
慕虎7371278
TA貢獻1802條經驗 獲得超4個贊
實現它的最簡單方法是使用您的選擇變量來控制循環條件：
System.out.println("\nWelcome to our Calculation Program!\n----------------------------------------");
String choice = "yes";
while(choice.equals("yes")) {
System.out.print("Enter a number with at most 7-digits:");
int input = mykeyboard.nextInt();
int sum = 0;
while (input > 0) {
int add = input % 10;
sum = sum + add;
input = input / 10;
}
System.out.println("Sum of the digits of your input is: " + sum);
System.out.print("The divisors of " + sum + " are as follows: " );
for (int counter = 1; sum >= counter; counter++) {
if (sum % counter == 0)
System.out.print(counter + " ");
System.out.println("\n\nDo you want to try another number?");
Scanner mykeyboard2 = new Scanner(System.in);
choice = mykeyboard2.nextLine();
}
System.out.println("Thanks and Have a Great Day!");
BIG陽
TA貢獻1859條經驗 獲得超6個贊
你只需要讓循環重新開始
System.out.print("Enter a number with at most 7-digits:");
int input = mykeyboard.nextInt();
while(input != -1){
int sum = 0;
int add = input % 10;
sum = sum + add;
input = input / 10;
System.out.println("Sum of the digits of your input is: " + sum);
System.out.print("The divisors of " + sum + " are as follows: " );
for (int counter = 1; sum >= counter; counter++) {
if (sum % counter == 0)
System.out.print(counter + " ");
System.out.print("Do you want another number? If you dont type -1: ");
input = mykeyboard.nextInt();
}
代碼會一直運行直到用戶輸入 -1
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