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Do While语句卡在无限循环中

do-while infinite-loop loops java

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Stephanie · 技术社区 · 7 年前

你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸。你未来的孩子最适合长到4英尺10英寸

//允许使用键盘扫描仪键盘输入=新扫描仪(系统输入);

    //Allows user to input numbers
    System.out.println("Enter the gender of your future child. Use 1 for Female and 0 for Male: ");
    int Gender = keyboardInput.nextInt();
    System.out.println("Enter the height in feet, then in inches of the mom: ");
    int MomHeight = keyboardInput.nextInt();
    System.out.println("Enter the height in feet, then the height in inches of the dad: ");
    int DadHeight = keyboardInput.nextInt();

    int female;
    int male;
    int HeightFeet;
    int HeightInches;

    DecimalFormat feet = new DecimalFormat("#0");
    DecimalFormat inches = new DecimalFormat("#0");

    //Loop statements
    while (Gender == 0)
    {
       male = (MomHeight * 13 / 12 + DadHeight) / 2;
       HeightFeet = male / 12;
       HeightInches = male % 12;   

    System.out.print("Your future child is estimated to grow to " + feet.format(HeightFeet));
    System.out.print(" feet and " + inches.format(HeightInches));
    System.out.print(" inches.");
    System.out.println("");
    }

    while (Gender == 1)
    {
        female = (DadHeight * 12 /13 + MomHeight) /2;
        HeightFeet = female / 12;
         HeightInches= female % 12;

    System.out.print("Your future child is estmated to grow to " + feet.format(HeightFeet));
    System.out.print(" feet and " + inches.format(HeightInches));
    System.out.print(" inches.");
    System.out.println("");
    } } }

2 回复 | 直到 7 年前

davidxxx 7 年前

在你的循环中, Gender 从不修改。所以你真的永远在循环。
while 陈述
一 if else if

顺便说一下,您应该命名变量 gender 而不是要遵守Java命名约定:

if (gender == 0){
      ...
}

else if (gender == 1){
       ...
}

如果要多次重复所有处理,可以使用循环:

 boolean again = false;
 do{
       if (gender == 0){
          ...
       }

       else if (gender == 1){
           ...
       }
       ...
      again = keyboardInput.nextBoolean();

 } while (again);

Mohit Mandokhot 7 年前

为了退出循环,您需要在循环在您所需的次数之后执行之后,条件变为false。

while (Gender == 0){
//Do this
}

while (Gender == 1){
//Do this instead
}

因此,做出选择是基于性别

//Assume print is to be done 2 times

int count = 1;

if(Gender == 0){
//Female selection
while( count < 3 ){
 // Execute female code
 count++;
}
else if(Gender == 1){
//Male selection
while( count < 3 ){
 // Execute male code
 count++;
}