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数组、二维数组

时间:2014-11-15 21:46:58      阅读:235      评论:0      收藏:0      [点我收藏+]

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                                                     简单的数组、二位数组
1
package com.lovo; 2 3 import java.util.Scanner; 4 5 /** 6 * 二维数组 7 * 8 * @author 王启文 9 * 10 */ 11 12 public class D2 { 13 public static void main(String[] args) { 14 Scanner sc = new Scanner(System.in); 15 16 String[] names = { "赵大", "钱二", "孙三", "李四", "周五" }; 17 String[] course = { "语文", "数学", "英语" }; 18 double[][] scores = new double[5][3]; 19 20 for (int i = 0; i < scores.length; ++i) { 21 System.out.println("请输入" + names[i] + "的成绩:"); 22 for (int j = 0; j < scores[i].length; ++j) { 23 System.out.print("\t" + course[j] + ":"); 24 scores[i][j] = sc.nextDouble(); 25 } 26 } 27 28 double ChSum = 0; 29 double MaSum = 0; 30 double EnSum = 0; 31 32 for (int i = 0; i < scores.length; ++i) { 33 double sum = 0; 34 for (int j = 0; j < scores[i].length; ++j) { 35 sum += scores[i][j]; 36 if (j == 0) { 37 ChSum += scores[i][j]; 38 } 39 if (j == 1) { 40 MaSum += scores[i][j]; 41 } 42 if (j == 2) { 43 EnSum += scores[i][j]; 44 } 45 } 46 System.out.printf("%s的平均分为:%.2f\n", names[i], sum 47 / scores[i].length); 48 } 49 50 System.out.printf("语文的平均分为:%.2f\n", ChSum / names.length); 51 System.out.printf("数学的平均分为:%.2f\n", MaSum / names.length); 52 System.out.printf("英语的平均分为:%.2f\n", EnSum / names.length); 53 54 sc.close(); 55 } 56 }

杨辉三角

 1 package com.lovo;
 2 
 3 /**
 4  * 杨辉三角
 5  * 
 6  * @author 王启文
 7  * 
 8  */
 9 public class D3 {
10     public static void main(String[] args) {
11         int[][] h = new int[10][];
12 
13         for (int i = 0; i < h.length; ++i) {
14             h[i] = new int[i + 1];
15             for (int j = 0; j < h[i].length; ++j) {
16                 if (j == 0 || j == i) {
17                     h[i][j] = 0;
18                 } else {
19                     h[i][j] = h[i - 1][j] + h[i - 1][j - 1];
20                 }
21                 System.out.print(h[i][j] + "\t");
22             }
23             System.out.println();
24         }
25     }
26 }

 

数组、二维数组

标签:style   blog   color   ar   os   sp   java   for   strong   

原文地址:http://www.cnblogs.com/Wqwwd/p/4100259.html

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