如果你信誓旦旦的回家測試
卻看到以下畫面
曹山表示:沒有錯,你又進入了黃泉路666號
以上閒聊
以下正題
因為SQL安裝的時候預設是用WINDOWS驗證
(某軟公司自認WINDOWS驗證最安全)
所以請改成SQL Server 及 Windows驗證模式
以下圖解
以上
如果你信誓旦旦的回家測試
卻看到以下畫面
曹山表示:沒有錯,你又進入了黃泉路666號
以上閒聊
以下正題
因為SQL安裝的時候預設是用WINDOWS驗證
(某軟公司自認WINDOWS驗證最安全)
所以請改成SQL Server 及 Windows驗證模式
以下圖解
以上
package com.web;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class m3_lab2
*/
@WebServlet("/m3_lab2")
public class m3_lab2 extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public m3_lab2() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
// TODO Auto-generated method stub
doPost(request,response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
// TODO Auto-generated method stub
response.setContentType("text/html; charset=big5");
java.io.PrintWriter out = response.getWriter();
String [] list = {"大雄","宜靜","技安","阿福"};
out.println(list[(int)(Math.random()*list.length)].toString());
}
}
其實關於網頁置中排版的方法多的是
老實說瀏覽器百家爭鳴
也只能祈禱W3C那天真的能硬起來
像秦始皇一樣統一天下
車同軌 書同文 說置中就置中
所以說這鳥蛋問題早存在很久了
現代人學程式很簡單
不會的參照古人就好了
因為你會遇到的蠢問題 早在八百年前就有人遇過了
所以遇到問題 1.問咕狗大神 2.翻書 3.問人 4.擲杯
(用4的恭喜,因為你的問題前無古人後無來者只能問神,但是你搞得定可能就是下個假勃濕)
以上閒聊
以下正題
其實你可愛的DREAMWEAVER早就幫你設想好了
新增文件裡面的版面就很強大了
產生的程式碼還很貼心的寫了一堆註解
而且還是中文的!!
全國電子表示:揪甘心~
簡單來說置中的大原則是
body {margin: 0;}
把所有內容放進主容器container(當然你要叫啥都可)
.container {width: 960px; margin: 0 auto;}
以上
public class 質數_計次法 {
public static void main(String[] args) {
for (int target = 3; target <= 100; target++) {
int count = 0;
for (int i = 2; i < target; i++) {
if ((target%i) != 0) {
count++;
}
}
if (count == (target - 2)) {
System.out.print(target + ",");
}
}
}
}
概念是對的,原本跑不出來,是因為
int count = 0;必須在第一層迴圈之內
大家參考參考
public class 魏功豪_vector {
public static void main(String[] args) {
int betTimes = 10;
int balls = 49;
int temp;
for (int bt = 1; bt <= betTimes; bt++) {
java.util.Vector<Integer> allBalls = new java.util.Vector<Integer>();
for (int i = 0; i <= balls - 1; i++) {
allBalls.addElement(i + 1);
}
int [] arrSixBall = new int [6];
System.out.print("第" + bt + "注\t");
for (int times = 0; times < 6; times++) {
int randomTakeOneBall = (int)(Math.random()*allBalls.size());
arrSixBall[times] = (int)allBalls.get(randomTakeOneBall);
allBalls.remove(randomTakeOneBall);
}
for (int i = 0; i < 6; i++) {
for (int j = i; j < 6; j++) {
if (arrSixBall[i] < arrSixBall[j]) {
temp = arrSixBall[j];
arrSixBall[j] = arrSixBall[i];
arrSixBall[i] = temp;
}
}
}
for (int x = 0; x < 6; x++) {
System.out.print((arrSixBall[x] < 10) ? " " + arrSixBall[x] + ",\t" : arrSixBall[x] + ",\t");
}
System.out.print("\n");
}
}
}
public class 魏功豪_callststic {
public static void main(String[] args) {
int betTimes = 10;
int allBalls = 49;
int [] getAllBalls;
int [] getSixBalls;
int [] getOrderByDESC;
for (int bt = 1; bt <= betTimes; bt++) {
getAllBalls = 魏功豪_callststic.functiondoArrBoxAll(allBalls);//長度[49]陣列傳進getAllBalls
getSixBalls = 魏功豪_callststic.functionRandomGetBall(getAllBalls);//長度[6]陣列傳進getSixBalls
getOrderByDESC = 魏功豪_callststic.functionOrderByDESC(getSixBalls);//長度[6]陣列傳進getOrderByDESC
System.out.print("第" + bt + "注\t");
for (int i = 0; i <= 5; i++) {
System.out.print((getOrderByDESC[i] < 10) ? " " + getOrderByDESC[i] + ",\t" : getOrderByDESC[i] + ",\t");
}
System.out.print("\n");
}
}
public static int [] functiondoArrBoxAll(int howManyAllBalls) {
int [] doArrBoxAll = new int [howManyAllBalls];
for (int i = 0; i <= howManyAllBalls - 1; i++) {
doArrBoxAll[i] = i + 1;
}
return doArrBoxAll;//製造長度[49]陣列傳回,最初的49顆球陣列
}
public static int [] functionRandomGetBall(int [] arrOriginal) {
int getballs = 6;
int [] doArrSixBall = new int [getballs];
for (int times = 1; times <= getballs; times++) {
int randomTakeOneBall = (int)(Math.random()*arrOriginal.length);
doArrSixBall[times-1] = arrOriginal[randomTakeOneBall];
int [] arrNew = new int [arrOriginal.length - 1];
for (int i = 0; i <= (arrOriginal.length - 1) - 1; i++) {
arrNew[i] = (i < randomTakeOneBall) ? arrOriginal[i] : arrOriginal[i + 1];
}
arrOriginal = arrNew;
}
return doArrSixBall;//製造長度[6]陣列傳回,隨機取6球,未排列
}
public static int [] functionOrderByDESC(int [] arrRandomSixBall) {
int temp;
for (int i = 0; i < 6; i++) {
for (int j = i; j < 6; j++) {
if (arrRandomSixBall[i] < arrRandomSixBall[j]) {
temp = arrRandomSixBall[j];
arrRandomSixBall[j] = arrRandomSixBall[i];
arrRandomSixBall[i] = temp;
}
}
}
return arrRandomSixBall;//製造長度[6]陣列傳回,將6球照大小排列
}
}
public class 魏功豪_作業_大樂透照大小排列_泡沫排序法 {
public static void main(String[] args) {
int betTimes = 10;
int allBalls = 49;
int [] arrSixBall = new int [6];
int temp;
//=============================
for (int bt = 1; bt <= betTimes; bt++) {
int [] arrOriginal = new int [allBalls];
for (int i = 0; i <= arrOriginal.length - 1; i++) {
arrOriginal[i] = i + 1;
}
System.out.print("第" + bt + "注\t");
for (int times = 1; times <= 6; times++) {
int randomTakeOneBall = (int)(Math.random()*arrOriginal.length);
arrSixBall[times-1] = arrOriginal[randomTakeOneBall];
int [] arrNew = new int [arrOriginal.length - 1];
for (int i = 0; i <= (arrOriginal.length - 1) - 1; i++) {
arrNew[i] = (i < randomTakeOneBall) ? arrOriginal[i] : arrOriginal[i + 1];
}
arrOriginal = arrNew;
}
for (int i = 0; i < 6; i++) {
for (int j = i; j < 6; j++) {
if (arrSixBall[i] < arrSixBall[j]) {
temp = arrSixBall[j];
arrSixBall[j] = arrSixBall[i];
arrSixBall[i] = temp;
}
}
}
for (int x = 0; x < 6; x++) {
System.out.print((arrSixBall[x] < 10) ? " " + arrSixBall[x] + ",\t" : arrSixBall[x] + ",\t");
}
System.out.print("\n");
}
//=============================
}
}
public class 魏功豪_作業_大樂透照大小排列 {
public static void main(String[] args) {
int betTimes = 6;
int allBalls = 49;
int [] arrSixBall = new int [6];
//=============================
for (int bt = 1; bt <= betTimes; bt++) {
int [] arrOriginal = new int [allBalls];
for (int i = 0; i <= arrOriginal.length - 1; i++) {
arrOriginal[i] = i + 1;
}
System.out.print("第" + bt + "注\t");
for (int times = 1; times <= 6; times++) {
int randomTakeOneBall = (int)(Math.random()*arrOriginal.length);
arrSixBall[times-1] = arrOriginal[randomTakeOneBall];
int [] arrNew = new int [arrOriginal.length - 1];
for (int i = 0; i <= (arrOriginal.length - 1) - 1; i++) {
arrNew[i] = (i < randomTakeOneBall) ? arrOriginal[i] : arrOriginal[i + 1];
}
arrOriginal = arrNew;
}
for (int x = 1; x <= 6; x++) {
int temp = arrSixBall[0];
int arrNo = 0;
for (int i = 1; i <=5; i++) {
if (temp < arrSixBall[i]) {
temp = arrSixBall[i];
arrNo = i;
}
}
System.out.print((temp < 10) ? " " + temp + ",\t" :temp + ",\t");
arrSixBall[arrNo] = 0;
}
System.out.print("\n");
}
//=============================
}
}
public class 魏功豪_大樂透 {
public static void main(String[] args) {
int betTimes = 10;
int balls = 49;
//================================================================================
for (int bt = 1; bt <= betTimes; bt++) {
int [] arrOrg = new int [balls];
for (int i = 0; i <= balls-1; i++) {
arrOrg[i] = i + 1;
}
for (int sixTime = 0; sixTime < 6; sixTime++) {
int randomArrNo = (int)(Math.random()*(balls - sixTime));
if (arrOrg[randomArrNo] < 10) {
System.out.print(" ");
}
System.out.print(arrOrg[randomArrNo] + ",\t");
int [] arrNew = new int [arrOrg.length -1];
for (int i = 0; i <= arrNew.length -1; i++) {
//arrNew[i] = (i < randomArrNo) ? arrOrg[i] : arrOrg[i + 1];//三源運算子寫法
if (i < randomArrNo) {
arrNew[i] = arrOrg[i];
}
else {
arrNew[i] = arrOrg[i + 1];
}
}
arrOrg = arrNew;
}
System.out.print("\n");
}
//================================================================================
}
}
其實講義寫得很明白 //但是我看得很模糊
讓我們看看講義128頁 遞增運算
++
●後置 and 前置
int a = 5;
//a++ 即 a = a + 1
a++; /* 5為此後置Expression的值 */
a=5;
//++a 即 a = a + 1
++a; /* 6為此後置Expression的值 */
喔 我的天 是我眼花嗎
a++ 即 a = a + 1
++a 即 a = a + 1
那他們到底有他X的什麼不同???
我們看看曹山的說法
曹山:這一切都沒有錯,只不過你走進了黃泉路666號
以上博君一笑,以下解答
單看a++和++a的確沒啥不同 都是a = a + 1的意思
但是與其他運算式加在一起就有所分別
範例
從結果來看就很清楚
x++和++x都會重新對x的值+1
所以
第3行 X初值為10
第4行 X值改為11
第5行 X值改為12
而後面c d 前面有10 * 運算
其意義為
10 * x++ 為[10先乘x]再將[x = x + 1]
10 * ++x 為[先將]x = x + 1[再乘10]
所以
第6行可以看做
c = 10 * x;//x=12
x = x + 1;//x=13
第7行可以看做
x = x + 1;//x=14
d = 10 * x;//x=14
簡單來說
x++ 就是會先與其他算式運算 之後才 x = x + 1 將x值增1
++x 就是先 x = x + 1 將x值增1 之後才與其他算式運算
public class 魏功豪_test_continue {
public static void main(String[] args) {
int start = 1;
int end = 9;
for (int Counter = start; Counter <= end; Counter++) {
if (Counter % 2 == 1) {
for (int i = 1; i <= (end - Counter) / 2; i++) {
System.out.print(" ");
}
}
for (int i = 1; i <= Counter; i++) {
if (Counter % 2 == 0) {
continue;
}
System.out.print("*");
}
if (Counter % 2 == 0) {
System.out.print("\n");
}
}
}
}
public class 魏功豪_聖誕樹 {
public static void main (String[] args) {
int Line = 4;
for (int i = 1; i <= Line; i++) {
for (int j = 0; j <= i; j++) {
for (int k = 1; k <= (Line - j); k++) {
System.out.print(" ");
}
for (int l = 1; l <= 1 + (j * 2); l++) {
System.out.print("▲");
}
System.out.println("");
}
}
for (int z = 1; z <= Line; z++) {
for (int x = 1; x <= Line; x++) {
System.out.print(" ");
}
System.out.println("▲");
}
}
}
public class h04 {
public static void main (String[] args) {
int Line = 5;
for (int i = 1; i <= Line; i++) {
for (int j = 1; j <= Line - i; j++) {
System.out.print(" ");
}
for (int k = 1; k <= (i * 2) - 1; k++) {
System.out.print("*");
}
System.out.println("");
}
}
}
public class 魏功豪_作業_求質數 {
public static void main(String[] args) {
int fin = 100;
System.out.print(2 + ",");//唯一偶數質數
for (int i = 3; i <= fin; i++) {
boolean isPrimeNumber = true;
for (int j = 2; j <= (i - 1); j++) {
if (i % j == 0) {
isPrimeNumber = false;
}
}
if (isPrimeNumber) {
System.out.print(i + ",");
}
}
}
//網上神人用continue寫的
// public static void main(String[] arg) {
// int x, y;
// String result = "2\n";
// loopA:
// for (x = 3; x <= 100; x++) {
// for (y = 2; y <= x - 1; y++) {
// if (x % y == 0)
// continue loopA; /看不懂 -.-
// }
// result += x + "\n";
// }
// System.out.println(result);
// }
}