*6.5(对三个数排序)使用下面的方法头编写方法,按升序显示三个数:
public static void displaySortedNumbers( double num1, double num2, double num3)
编写测试程序,提示用户输入三个数字,调用方法以升序显示他们。
*6.5(Sort three numbers) Write a method with the following header to display three numbers in decreasing order:
public static void displaySortedNumbers( double num1, double num2, double num3)
Write a test program that prompts the user to enter three numbers and invokes the method to display them in decreasing order.
下面是参考答案代码:
public class SortThreeNumbersQuestion5 {
public static void main(String[] args) {
displaySortedNumbers(1, 2, 3);
displaySortedNumbers(1, 3, 2);
displaySortedNumbers(2, 1, 3);
displaySortedNumbers(2, 3, 1);
displaySortedNumbers(3, 1, 2);
displaySortedNumbers(3, 2, 1);
}
public static void displaySortedNumbers(double num1, double num2, double num3) {
if(num1 < num2)
{
if(num1 < num3)
{
System.out.print(num1 + " ");
if(num2 < num3)
System.out.print(num2 + " " + num3);
else
System.out.print(num3 + " " + num2);
}
else
System.out.print(num3 + " " + num1 + " " + num2);
}
else
{
if(num2 < num3)
{
System.out.print(num2 + " ");
if(num1 < num3)
System.out.print(num1 + " " + num3);
else
System.out.print(num3 + " " + num1);
}
else
System.out.print(num3 + " " + num2 + " " + num1);
}
System.out.print("\n");
}
}
运行效果:
注:编写程序要养成良好习惯
1.文件名要用英文,具体一点
2.注释要英文
3.变量命名要具体,不要抽象(如:a,b,c等等),形式要驼峰化
4.整体书写风格要统一(不要这里是驼峰,那里是下划线,这里的逻辑段落空三行,那里相同的逻辑段落空5行等等)
5.普通变量,方法名要小驼峰,类名要大驼峰,常量要使用全部大写加上下划线命名法
6.要学习相应的代码编辑器的一些常用快捷键,如:快速对齐等等