threadlab and weblab initialized

2025-06-08 00:58:01 +08:00
parent 23d48ee092
commit 6da43cbff0
7 changed files with 84 additions and 0 deletions
--- a/threadlab/Makefile
+++ b/threadlab/Makefile
@ -0,0 +1,2 @@
+all: SearchRandom.c
+	gcc -o SearchRandom SearchRandom.c
--- a/threadlab/SearchRandom
+++ b/threadlab/SearchRandom
--- a/threadlab/SearchRandom.c
+++ b/threadlab/SearchRandom.c
@ -0,0 +1,65 @@
+/*
+	某个应用程序的随机数产生机制是这样的：
+	1、首先产生一个0~0xFFFFFFFF之间的数，称为“密码”X
+	2、用(X,0x29A)调用随机数更新函数GenerateRandomNumber，产生新的(Y,Z)
+	3、用(Y,Z)调用随机数更新函数GenerateRandomNumber，产生新的(A,B)
+	4、把B传给用户
+	
+	本程序（你的）目的，就是在知道这套机制、知道B的前提下，计算出X是多少？
+	
+	非常简单的思路：
+	1、循环，从i=0~0xFFFFFFFF
+	2、GenerateRandomNumber(i,0x29A)
+	3、GenerateRandomNumber(A,B)
+	4、判断B是否等于想要找的值
+	
+*/
+
+#include <stdio.h>
+#include <time.h>
+
+/* 更新随机数 */
+void GenerateRandomNumber(unsigned int *rand1_h,unsigned int *rand1_l)
+{
+	/*请忽略下列代码，知道是产生更新随机数即可，原理不必弄清楚*/
+	unsigned long long x = (unsigned long long)*rand1_h;
+	x *= 0x6AC690C5;
+	x += *rand1_l;
+
+	*rand1_h = (unsigned int)x;
+	*rand1_l = (unsigned int)(x>>32);
+}
+
+void SearchRandomNumber(unsigned int begin_h,unsigned int begin_l, unsigned int search_val)
+{
+	/* 在begin_l~begin_h之间，计算B的值，看看是否和search_val相等*/
+	unsigned int i;
+	unsigned int h,l;
+
+	for (i=begin_l;i<begin_h;i++)
+	{
+		h = i;
+		l = 0x29A;
+		GenerateRandomNumber(&h,&l);	// 第一次调用
+		GenerateRandomNumber(&h,&l);	// 第二次调用
+		if (l==search_val)						// 判断B是否和search_val相等
+		{
+			printf("找到啦~! 密码是%08X\n",i);	// 相等，找到了~~
+		}
+	}
+}
+
+int main()
+{
+	time_t begin_time,end_time;
+	
+	printf("这是一个标准、最慢的搜索程序，拼主频！\n");
+	
+	begin_time = time(NULL);							// 记录开始时刻
+	SearchRandomNumber(0xFFFFFFFF,0,0x39A6FFBB);	// 在0~0xFFFFFFFF之间进行搜索
+	// 0x39A6FFBB => 0x70FFFFFF
+	end_time = time(NULL);								// 记录结束时刻
+
+	printf("耗时%ld秒~~\n",end_time-begin_time);	// 结束-开始=耗时
+  return 0;
+}
--- a/threadlab/计算机系统-实验11.pptx
+++ b/threadlab/计算机系统-实验11.pptx
--- a/weblab/index.html
+++ b/weblab/index.html
@ -0,0 +1,15 @@
+<!Doctype html>
+<html>
+<head>
+<title><EFBFBD><EFBFBD>ǧ<EFBFBD>ǵ<EFBFBD>Web<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></title>
+</head>
+<body>
+<p><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>~</p>
+<p><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD>ˣ<EFBFBD></p>
+<p><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>޳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
+<p><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
+<p>˵<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>ó<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>糵</p>
+<p></p>
+<p><EFBFBD><EFBFBD><EFBFBD>ӻ<EFBFBD><EFBFBD><EFBFBD>ǹ<EFBFBD><EFBFBD>~~</p>
+</body>
+</html>
--- a/weblab/www.ini
+++ b/weblab/www.ini
@ -0,0 +1,2 @@
+root=c:\adb
+port=80
--- a/weblab/计算机系统-实验10.pptx
+++ b/weblab/计算机系统-实验10.pptx