日期:2014-05-20 浏览次数:20853 次
import java.lang.Math; import java.io.*; /** * 绘制近似圆 */ public class Circle { /** * 圆的半径 * @param r:圆的的半径 */ private double r; public double getR() { return r; } public void setR(double R) { r = R; } public void draw() { System.out.print("请输入半径"); try { //读入半径 BufferedReader br =new BufferedReader(new InputStreamReader(System.in)); r = Double.parseDouble(br.readLine()) ; } catch(IOException e) { e.toString(); } int x1,x2,y; String str; for (int i = 0; i <= 12; i++) { if (i == 0) { y = Math.round((float)(r-Math.cos(Math.toRadians(15*i))*r)); }else{ y = Math.round((float)(r-Math.cos(Math.toRadians(15*i))*r))-Math.round((float)(r-Math.cos(Math.toRadians(15*i-15))*r)); } x1 = Math.round((float)(r-Math.sin(Math.toRadians(15*i))*r)); x2 = Math.round((float)(r+Math.sin(Math.toRadians(15*i))*r)); str = ""; if (i != 0 && i != 12) { if (y == 0) { continue; } }else if(i == 12){ System.out.println(""); } for (int j=0; j <y; j++) { System.out.println(""); } for (int k=0; k < x1; k++) { str+=" "; } str+="*"; for (int k=0; k < x2-x1; k++) { str+=" "; } str+="*"; System.out.print(str+"角度"+15*i+"y="+y+" x1="+x1+" x2="+x2); } System.out.println(""); draw(); } public static void main(String args[]) { new Circle().draw(); } }