Question

我正在尝试制作一个计算器，它从用户那里获取一个数字然后乘以我设置但我遇到了障碍。我需要让我的代码在每一步结束时取出产品然后乘以我设置的数字，但我无法弄清楚如何做到这一点。到目前为止，我所做的就是将每个步骤的用户数量乘以我不需要做的事情。

实施例：用户输入8.我的代码取8并将其乘以我设置的数字，在本例中为6.然后我需要取出产品48并将其乘以我的另一个数字，然后将该产品再次乘以它，产品等等几个步骤。我知道我不应该每次都输入userNum，但我不确定我应该放什么，我想确保代码至少部分功能。：P如果令人困惑，请告诉我，我会编辑它。

    int firstNum;
    firstNum = 6;

    int secondNum;
    secondNum = 60;



    Scanner userInputScanner = new Scanner(System.in);

    System.out.println ("Hello, my name is Ronnie. What is your name?");

    String userName = userInputScanner.nextLine(); 

    System.out.println ("Hello, " + userName +  ". How many steps do you take in a ten second interval?"); 

    String userNumString = userInputScanner.nextLine();

    int userNum = Integer.parseInt(userNumString);      

    System.out.println("If you take " + userNum +  " steps in a 10 second interval, you could potentially achieve..."); 

    System.out.println ("Number of steps per minute: " + (userNum * firstNum) +""); 

    System.out.println ("Number of steps per hour: " + (userNum * secondNum) +"");

Answer 1

使用中间变量：

System.out.println("If you take " + userNum +  " steps in a 10 second " + 
    "interval, you could potentially achieve..."); 

long perMinute = userNum * 6;
System.out.println("Number of steps per minute: " + perMinute); 


long perHour = perMinute * 60;
System.out.println("Number of steps per hour: " + perHour); 

// ...

Answer 2

如果你只做两步，你可以使用它。否则你可以创建一个中间变量产品，并在每次打印前将结果保存在其中。

System.out.println ("Number of steps per hour: " + (userNum *firstNum* secondNum) +"");

Answer 3

如果你知道它总是这样，你可以计算每个部分的数学：

int userNum = Integer.parseInt(userNumString);      

System.out.println("If you take " + userNum +  " steps in a 10 second interval, you could potentially achieve..."); 

System.out.println ("Number of steps per minute: " + (userNum * firstNum) +""); 

System.out.println ("Number of steps per hour: " + (userNum * secondNum * firstNum) +"");

Answer 4

据我所知，你想记录每个乘法值......

因此，假设您需要10个值：您可以使用数组：

int[] numbersToMultiply= [1,2,3,4,5,6,7,8,9,60];
int array[10];
Scanner userInputScanner = new Scanner(System.in);
System.out.println ("Hello, my name is Ronnie. What is your name?");
String userName = userInputScanner.nextLine();
System.out.println ("Hello, " + userName +  ". How many steps do you take in a ten second interval?");
String userNumString = userInputScanner.nextLine();

for(int i=0;i<10;i++){
   array[i] = userNum * numbersToMultiply[i];
}
System.out.println("If you take " + array[0] +  " steps in a 10 second interval, you could potentially achieve..."); 
System.out.println ("Number of steps per minute: " + array[1] +""); 

System.out.println ("Number of steps per hour: " array[10]"");

将一系列数字乘以Java

4 个答案: