用matlab语言写一下 EDE,L = ∑ i ∑ j ∑ k ALk,j,i • EIk,j,i • EFk,j,i,P
时间: 2023-08-30 18:04:11 浏览: 49
以下是用MATLAB语言实现EDE, L = ∑i ∑j ∑k ALk,j,i • EIk,j,i • EFk,j,i,P的代码:
```matlab
% 定义ALk,j,i, EIk,j,i, EFk,j,i,P的值
AL = rand(3,3,3); % 随机生成一个3x3x3的矩阵
EI = rand(3,3,3);
EF = rand(3,3,3);
P = rand(1);
% 计算L
L = 0;
for i = 1:3
for j = 1:3
for k = 1:3
L = L + AL(k,j,i)*EI(k,j,i)*EF(k,j,i,P);
end
end
end
% 显示结果
disp(L);
```
在上面的代码中,我们首先生成了AL、EI和EF三个矩阵,以及一个标量P。然后使用三个嵌套的for循环计算L的值,最后将L的结果显示出来。
相关问题
请用C++语言写一个DES算法的字符串加密函数
可以使用以下C语言代码来实现DES算法的字符串加密函数: #include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<openssl/des.h>
static void des3_encrypt(unsigned char *plaintext, int plaintext_len, unsigned char *key, unsigned char *iv, unsigned char *ciphertext)
{
DES_cblock * ks1, * ks2, * ks3;
DES_key_schedule ks1_sched, ks2_sched, ks3_sched;
// 初始化密钥
ks1 = (DES_cblock *)key;
ks2 = ks1 + 8;
ks3 = ks2 + 8;
// 生成密钥表
DES_set_key_unchecked(ks1, &ks1_sched);
DES_set_key_unchecked(ks2, &ks2_sched);
DES_set_key_unchecked(ks3, &ks3_sched);
// 加密
DES_ede3_cbc_encrypt((const unsigned char *)plaintext, ciphertext, plaintext_len, &ks1_sched, &ks2_sched, &ks3_sched, (DES_cblock *)iv, DES_ENCRYPT);
}
static void des3_decrypt(unsigned char *ciphertext, int ciphertext_len, unsigned char *key, unsigned char *iv, unsigned char *plaintext)
{
DES_cblock * ks1, * ks2, * ks3;
DES_key_schedule ks1_sched, ks2_sched, ks3_sched;
// 初始化密钥
ks1 = (DES_cblock *)key;
ks2 = ks1 + 8;
ks3 = ks2 + 8;
// 生成密钥表
DES_set_key_unchecked(ks1, &ks1_sched);
DES_set_key_unchecked(ks2, &ks2_sched);
DES_set_key_unchecked(ks3, &ks3_sched);
// 解密
DES_ede3_cbc_encrypt(ciphertext, plaintext, ciphertext_len, &ks1_sched, &ks2_sched, &ks3_sched, (DES_cblock *)iv, DES_DECRYPT);
}
int main(int argc, char **argv)
{
// 获取明文
unsigned char *plaintext = (unsigned char *)argv[1];
int plaintext_len = strlen(argv[1]);
// 密钥
unsigned char *key = (unsigned char *)"12345678";
// 初始化向量
unsigned char iv[8] = { 0 };
// 加密后的密文
unsigned char ciphertext[1024] = { 0 };
// 加密
des3_encrypt(plaintext, plaintext_len, key, iv, ciphertext);
printf("DES3 Encrypted Text: %s\n", ciphertext);
// 解密
des3_decrypt(ciphertext, plaintext_len, key, iv, plaintext);
printf("DES3 Decrypted Text: %s\n", plaintext);
return 0;
}
用javascript和css写2048游戏
以下是用JavaScript和CSS写的简单2048游戏的代码,可以在浏览器中运行:
HTML:
```html
<!DOCTYPE html>
<html>
<head>
<title>2048</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div id="container">
<div id="header">
<h1>2048</h1>
<div id="score">Score: 0</div>
</div>
<div id="gameboard"></div>
<button id="newgame">New Game</button>
<div id="endgame"></div>
</div>
<script type="text/javascript" src="script.js"></script>
</body>
</html>
```
CSS:
```css
body {
margin: 0;
padding: 0;
font-family: Arial, sans-serif;
background-color: #faf8ef;
}
#container {
margin: 0 auto;
width: 500px;
height: 600px;
background-color: #bbada0;
border-radius: 10px;
overflow: hidden;
}
#header {
padding: 20px;
background-color: #8f7a66;
color: #f9f6f2;
text-align: center;
}
#score {
font-size: 24px;
margin-top: 10px;
}
#gameboard {
margin: 20px;
width: 460px;
height: 460px;
background-color: #cdc1b4;
border-radius: 10px;
position: relative;
}
.tile {
position: absolute;
width: 100px;
height: 100px;
border-radius: 5px;
font-size: 48px;
font-weight: bold;
text-align: center;
line-height: 100px;
}
.tile-2 {
background-color: #eee4da;
color: #776e65;
}
.tile-4 {
background-color: #ede0c8;
color: #776e65;
}
.tile-8 {
background-color: #f2b179;
color: #f9f6f2;
}
.tile-16 {
background-color: #f59563;
color: #f9f6f2;
}
.tile-32 {
background-color: #f67c5f;
color: #f9f6f2;
}
.tile-64 {
background-color: #f65e3b;
color: #f9f6f2;
}
.tile-128 {
background-color: #edcf72;
color: #f9f6f2;
}
.tile-256 {
background-color: #edcc61;
color: #f9f6f2;
}
.tile-512 {
background-color: #edc850;
color: #f9f6f2;
}
.tile-1024 {
background-color: #edc53f;
color: #f9f6f2;
}
.tile-2048 {
background-color: #edc22e;
color: #f9f6f2;
}
#newgame {
display: block;
margin: 20px auto;
padding: 10px 20px;
background-color: #8f7a66;
border: none;
border-radius: 5px;
color: #f9f6f2;
font-size: 20px;
cursor: pointer;
}
#endgame {
display: none;
position: absolute;
width: 460px;
height: 460px;
border-radius: 10px;
background-color: rgba(238, 228, 218, 0.73);
text-align: center;
line-height: 460px;
font-size: 48px;
font-weight: bold;
color: #776e65;
}
```
JavaScript:
```javascript
var score = 0;
var gameboard = [];
var gameover = false;
// 创建一个空的4x4方格
function createGrid() {
for (var i = 0; i < 4; i++) {
gameboard[i] = [];
for (var j = 0; j < 4; j++) {
gameboard[i][j] = 0;
}
}
}
// 在空的方格中随机放置一个2或4
function addNewTile() {
var row = Math.floor(Math.random() * 4);
var col = Math.floor(Math.random() * 4);
while (gameboard[row][col] !== 0) {
row = Math.floor(Math.random() * 4);
col = Math.floor(Math.random() * 4);
}
gameboard[row][col] = Math.random() < 0.5 ? 2 : 4;
}
// 更新分数
function updateScore() {
document.getElementById("score").innerHTML = "Score: " + score;
}
// 显示方格
function showGrid() {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
var tile = document.createElement("div");
tile.className = "tile tile-" + gameboard[i][j];
tile.style.top = (i * 120 + 20) + "px";
tile.style.left = (j * 120 + 20) + "px";
tile.innerHTML = gameboard[i][j] !== 0 ? gameboard[i][j] : "";
document.getElementById("gameboard").appendChild(tile);
}
}
}
// 清除方格
function clearGrid() {
var tiles = document.getElementsByClassName("tile");
while (tiles.length > 0) {
tiles[0].parentNode.removeChild(tiles[0]);
}
}
// 判断方格是否可以移动
function canMove() {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
if (gameboard[i][j] === 0) {
return true;
} else if (j > 0 && gameboard[i][j] === gameboard[i][j-1]) {
return true;
} else if (i > 0 && gameboard[i][j] === gameboard[i-1][j]) {
return true;
}
}
}
return false;
}
// 判断方格是否胜利
function isWin() {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
if (gameboard[i][j] === 2048) {
return true;
}
}
}
return false;
}
// 滑动方格
function slideLeft() {
var moved = false;
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 3; j++) {
if (gameboard[i][j] !== 0) {
for (var k = j+1; k < 4; k++) {
if (gameboard[i][k] !== 0) {
if (gameboard[i][j] === gameboard[i][k]) {
gameboard[i][j] *= 2;
score += gameboard[i][j];
gameboard[i][k] = 0;
moved = true;
}
break;
}
}
}
}
var row = [];
for (var j = 0; j < 4; j++) {
if (gameboard[i][j] !== 0) {
row.push(gameboard[i][j]);
}
}
while (row.length < 4) {
row.push(0);
}
for (var j = 0; j < 4; j++) {
if (gameboard[i][j] !== row[j]) {
moved = true;
}
gameboard[i][j] = row[j];
}
}
return moved;
}
// 主函数
function main() {
createGrid();
addNewTile();
addNewTile();
updateScore();
showGrid();
document.addEventListener("keydown", function(event) {
if (!gameover) {
switch (event.keyCode) {
case 37: // 左箭头
if (slideLeft()) {
clearGrid();
showGrid();
addNewTile();
updateScore();
if (isWin()) {
document.getElementById("endgame").innerHTML = "You win!";
document.getElementById("endgame").style.display = "block";
gameover = true;
} else if (!canMove()) {
document.getElementById("endgame").innerHTML = "Game over!";
document.getElementById("endgame").style.display = "block";
gameover = true;
}
}
break;
case 38: // 上箭头
gameboard = rotateLeft(gameboard);
gameboard = rotateLeft(gameboard);
gameboard = rotateLeft(gameboard);
if (slideLeft()) {
gameboard = rotateRight(gameboard);
clearGrid();
showGrid();
addNewTile();
updateScore();
if (isWin()) {
document.getElementById("endgame").innerHTML = "You win!";
document.getElementById("endgame").style.display = "block";
gameover = true;
} else if (!canMove()) {
document.getElementById("endgame").innerHTML = "Game over!";
document.getElementById("endgame").style.display = "block";
gameover = true;
}
} else {
gameboard = rotateRight(gameboard);
}
break;
case 39: // 右箭头
gameboard = flipGrid(gameboard);
if (slideLeft()) {
gameboard = flipGrid(gameboard);
clearGrid();
showGrid();
addNewTile();
updateScore();
if (isWin()) {
document.getElementById("endgame").innerHTML = "You win!";
document.getElementById("endgame").style.display = "block";
gameover = true;
} else if (!canMove()) {
document.getElementById("endgame").innerHTML = "Game over!";
document.getElementById("endgame").style.display = "block";
gameover = true;
}
} else {
gameboard = flipGrid(gameboard);
}
break;
case 40: // 下箭头
gameboard = rotateRight(gameboard);
if (slideLeft()) {
gameboard = rotateLeft(gameboard);
clearGrid();
showGrid();
addNewTile();
updateScore();
if (isWin()) {
document.getElementById("endgame").innerHTML = "You win!";
document.getElementById("endgame").style.display = "block";
gameover = true;
} else if (!canMove()) {
document.getElementById("endgame").innerHTML = "Game over!";
document.getElementById("endgame").style.display = "block";
gameover = true;
}
} else {
gameboard = rotateLeft(gameboard);
}
break;
default:
break;
}
}
});
document.getElementById("newgame").addEventListener("click", function() {
gameover = false;
gameboard = [];
createGrid();
addNewTile();
addNewTile();
score = 0;
updateScore();
clearGrid();
showGrid();
document.getElementById("endgame").style.display = "none";
});
}
main();
```
此代码实现了方格的滑动、合并、更新分数、判断胜利和失败等基本逻辑,您可以根据需要进行修改和扩展。