Java语言程序设计（基础篇）第十版 4.7

原创于 2018-10-01 11:05:17 发布 · 191 阅读

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本篇博客详细介绍了如何使用Java程序计算并打印出五边形五个顶点的坐标，通过用户输入圆的半径，利用三角函数精确计算各点位置。

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public class J4_7 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		java.util.Scanner input = new java.util.Scanner(System.in);
		System.out.print("Enter the radius of the bounding circle:");
		
		double radius = input.nextDouble();
		
		double x2 = 0;
		double y2 = 100;
		
		double x3 = Math.cos(Math.PI/10)*(-1)*radius;
		double y3 = Math.sin(Math.PI/10)*radius;
		
		double x1 = Math.cos(Math.PI/10)*radius;
		double y1 = Math.sin(Math.PI/10)*radius;

		double x4=Math.cos((3*Math.PI)/10)*(-1)*radius;
	    double y4=Math.sin((3*Math.PI)/10)*(-1)*radius;
	    
	    double x5=Math.cos((3*Math.PI)/10)*radius;
	    double y5=y4;
        
		
		System.out.println("The coordinates of five point on the pentagon are:");
		System.out.println("("+x1+","+y1+")");
		System.out.println("("+x2+","+y2+")");
		System.out.println("("+x3+","+y3+")");
		System.out.println("("+x4+","+y4+")");
		System.out.println("("+x5+","+y5+")");
		
		

	}

}