蓝桥杯2013年第四届真题-打印十字图 题解

import java.util.Scanner; public class 打印十字图 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int col = 1; for (int i = 0; i <= n; i++) { col += 4; } int[][] arr = new int[col][col]; //首先将最外围的一圈写出来 for (int i = 2; i < col-2; i++) { arr[0][i] = arr[col-1][i]= arr[i][col-1] = arr[i][0] = 1; //四个内折角表示出来 if (i % 2 == 0) { arr[i][i] = arr[col-1-i][i] = 1; if (i <= col/2+1) { arr[i-1][i] = arr[i][i-1] = arr[col-1-i+1][i] = arr[col-1-i][i-1] = 1; arr[col-i-1+1][col-1-i] = arr[col-1-i][col-i-1+1] = arr[i][col-1-i+1] = arr[i-1][col-i-1] = 1; } } } //将每一圈的上下左右边表示出来 for (int i = 2; i <= col-1-2; i+=2) { for (int j = i+2; j <= col-1-i-2; j++) { arr[i][j] = arr[col-1-i][j] = arr[j][i] = arr[j][col-1-i] = 1; } } //判断是否还存在落下的点没有处理 if (arr[col/2-1-2][col/2] == 0) { arr[col/2-1-1][col/2] = 1; } if (arr[col/2+1+2][col/2] == 0) { arr[col/2+1+1][col/2] = 1; } if (arr[col/2][col/2-1-2] == 0) { arr[col/2][col/2-1-1] = 1; } if (arr[col/2][col/2+1+2] == 0) { arr[col/2][col/2+1+1] = 1; } //最后通过数组中的0和1来表示最终结果 for (int i = 0; i < col; i++) { for (int j = 0; j < col; j++) { if (arr[i][j] == 1 ) { System.out.print("$"); }else if (arr[i][j] == 0 ) { System.out.print("."); } } System.out.println(); } } }