Java打印心形图形的算法？

Question

如题所述

Answer 1

import java.util.Scanner;

public class Test {

static void draw(int n) {
int i, j;
for (i = 1 - (n >> 1); i <= n; i++)
if (i > 0) {
for (j = 0; j < i; j++)
System.out.print(" ");
for (j = 1; j <= 2 * (n - i) + 1; j++)
if (j == 1 || j == 2 * (n - i) + 1)
System.out.print(" *");
else
System.out.print(" ");
System.out.println("\n");
} else if (i == 0) {
System.out.print(" *");
for (j = 1; j < n; j++)
System.out.print(" ");
System.out.print(" *");
for (j = 1; j < n; j++)
System.out.print(" ");
System.out.print(" *\n");
} else {
for (j = i; j < 0; j++)
System.out.print(" ");
for (j = 1; j <= n + 2 * i + 1; j++)
if (i == 1 - (n >> 1))
System.out.print(" *");
else if (j == 1 || j == n + 2 * i + 1)
System.out.print(" *");
else
System.out.print(" ");
for (j = 1; j <= -1 - 2 * i; j++)
System.out.print(" ");
for (j = 1; j <= n + 2 * i + 1; j++)
if (i == 1 - (n >> 1))
System.out.print(" *");
else if (j == 1 || j == n + 2 * i + 1)
System.out.print(" *");
else
System.out.print(" ");
System.out.print("\n");
}
}

public static void main(String[] args) {

System.out.println("Please input the size (n>=4):");
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
draw(n);

}
}