Java语言：计算面积 && 求三个数的平均值

最新推荐文章于 2022-09-19 15:31:37 发布

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最新推荐文章于 2022-09-19 15:31:37 发布

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本文链接：https://blog.youkuaiyun.com/weixin_44772874/article/details/96298774

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该博客介绍了如何使用Java语言进行两个方面的编程：一是计算几何形状的面积，强调代码的逐步完善过程；二是求解三个数的平均值，展示了基本的算术运算应用。

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1、计算面积

import java.util.Scanner;
public class Course0716{
	public static void main(String[] args){
        /*
        double radius = 20.0;
		double area;
		area = radius * radius * 3.14159;
	    System.out.println(" The area for the circle of radius " + radius + " is " + area);	
        */
        
        /*
        Scanner input = new Scanner(System.in);
		System.out.print("Enter a number for radius:");
		double radius = input.nextDouble();
		double area = radius * radius * 3.14159;
		System.out.println(" The area for the circle of radius " + radius + " is " + area);
        */
        
		final double PI = 3.14159;
		Scanner input = new Scanner(System.in);
		System.out.print("Enter a number for radius:");
		double radius = input.nextDouble();
		double area = radius*radius*PI;
		System.out.println(" The area for the circle of radius " + radius + " is " + area);
	}
}

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代码是逐步完善的，虽然不难，大家可以参考
代码就是不断改善的！

2、求3个数的平均值

import java.util.Scanner;
public class Course0716{
	public static void main(String[] args){
        Scanner input = new Scanner(System.in);
		System.out.print("Enter three numbers:");
		double number1 = input.nextDouble();
		double number2 = input.nextDouble();
		double number3 = input.nextDouble();
	    double average = (number1 + number2 + number3)/3;
		System.out.println(" The average of " + number1 + " " +number2 + " " + number3 + " " + "is" + " " + average );
	}
}

在这里插入图片描述