我如何将我的程序转换成循环程序

Question

package fahrenheit;

import java.util.Scanner;

/**
*
* @author Steve
*/
public class Fahrenheit {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {

    // TODO code application logic here
    String name; // city name
    double temperatureInF; // original temperature
    double temperature; // converted temperature

    // declare an instance of Scanner to read the datastream from the keyboard.
Scanner kb = new Scanner(System.in);

    // get name of city
    System.out.println ("Hello, please enter name of city: ");
    name = kb.nextLine();

    // get temperature in Celsius
    System.out.println("Enter current temperature in " + name + " (celsius): ");
    temperature = kb.nextDouble();

    // convert to degrees Fahrenheit
    temperatureInF = ((temperature *9/5)+32);

    // output statement
    System.out.println(" The current temperature in " + name + " is " + temperature + " \u00b0C" + " which is " + temperatureInF + " \u00b0F");
}

}

0 32.0

1 33.8

2 35.6

这是我的输出语句

 // output statement
     System.out.println("\nCelsius" + "\t Fahrenheit" + temperatures[i][0] + " " + " " + temperatures[i][1]);
}
}

不管这给了我什么

摄氏度华氏0.0 32.0

Answer 1

我假设您知道如何使用循环，但您对如何在程序中添加循环感到困惑。

您可以首先创建一个2D数组,

double[][] temperatures = new double[41][2];

然后可以放置一个循环：

for(int i = 0; i < temperatures.length; i++)
{

        temperatures[i][0] = temperature+i; // increments temperature and adds value to array, temperature in celsius
        temperatures[i][1] = (((temperature+i) *9/5)+32); // temperature in Fahrenheit

}

package fahrenheit;

import java.util.Scanner;

/**
*
* @author Steve
*/
public class Fahrenheit {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {

    // TODO code application logic here
    String name; // city name
    double temperature; // temperature in Celsius
    double[][] temperatures = new double[41][2]; // stores temperature values

    // declare an instance of Scanner to read the datastream from the keyboard.
Scanner kb = new Scanner(System.in);

    // get name of city
    System.out.println ("Hello, please enter name of city: ");
    name = kb.nextLine();

    // get temperature in Celsius
    System.out.println("Enter current temperature in " + name + " (celsius): ");
    temperature = kb.nextDouble();

    for(int i = 0; i < temperatures.length; i++)
    {

        temperatures[i][0] = temperature+i; // increments temperature and adds value to array, temperature in celsius
        temperatures[i][1] = (((temperature+i) *9/5)+32); // temperature in Fahrenheit

    }

    System.out.println("\nCelsius" + "\t Fahrenheit");
    for(int i = 0; i < temperatures.length; i++)
    {

        // output statement
        System.out.println(temperatures[i][0] + " " + " " + temperatures[i][1]);
    }
}

}