java输入半径在控制台用*号绘制圆
import java.util.*; public class MathRound { private int radius; public static void main(String[] args) { int dist; System.out.println("Input the radius(R > 2):"); Scanner scan = new Scanner(System.in); try{ radius = Integer.parseInt(scan.next()); }catch(Exception e) { e.printStackTrace(); } radius = 2*radius; System.out.println("===========When R < 20 works well=============="); for(int i = 0; i <= radius; i ++) { int j = 0 ; if(i == radius/2)//对图形微调 continue; //中垂线到*号的距离 dist = (int)Math.sqrt(radius*radius - (radius - 2*i)*(radius - 2*i)); while(j < radius - dist)//左半圆 { System.out.print(" "); j++; } System.out.print("*"); dist = radius + dist; while(j < dist)//右半圆 { System.out.print(" "); j ++; } System.out.println("*"); } } }