HabaCo

package exam;

/* ========== 矩陣相乘 ========== */
public class Homework1 {
	public static void main(String[] args) {
		/**------------------------------------------------------------------
		eg.座標對照
			A				B
			┌ [0][0] [0][1] ┐		┌ [0][0] [0][1] [0][2] ┐	
			│ [1][0] [1][1] │	X	└ [1][0] [1][1] [1][2] ┘

HabaCo

/* ========== 魔術方塊 ========== */
public class Homework3 {

	public static void main(String[] args) {
		int size = 5;	// 可指定任意奇數
		int[][] array = new int[size][size];
		
		int count=1;
		int i=size-1,j=size/2;	// 數字 1 的初始位置
		array[i][j] = count++;  // 將 1 放入初始位置

HabaCo

import java.util.Random;
 
/* ========== 英文大小寫、數字隨機組合 ========== */
public class Random_02 {
 
	public static void main(String[] args) {
		/**-------------------------------------------------------------------
		Step1 : 建立一個樣本陣列 array[] = {1,2,3,4 ... 65,66,67 ... 97,98,99 ...}
			array[] 共 10+26+26 = 62 個 element
		Step2 : 從樣本陣列裡取亂數 => array[random(0~62)]

HabaCo

import java.util.Arrays;
import java.util.Random;

/* ========== 亂數取不重複 6 個數 ========== */
public class Random_01 {
 
	public static void main(String[] args) {
		Random r = new Random();
		int[] sixNum = new int[6];
		

HabaCo

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Ex_9_2 {

	public static void main(String[] args) throws FileNotFoundException {
		String filepath = "sample.txt";
		File file = new File(filepath);
		Scanner scan = new Scanner(file);

HabaCo

public class CalMain {
 
	public static void main(String[] args) {
		CalPlus c1 = new CalPlus(2,4,83,240);
		System.out.println(c1.counta+"隻"+c1.countb+"隻");
		
		CalPlus c2 = new CalPlus(12,15,24,312);
		System.out.println("麵包"+c2.counta+"個"+c2.countb+"個");
		
	}