threadlab and weblab initialized
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threadlab/Makefile
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threadlab/Makefile
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all: SearchRandom.c
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gcc -o SearchRandom SearchRandom.c
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threadlab/SearchRandom
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threadlab/SearchRandom
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threadlab/SearchRandom.c
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threadlab/SearchRandom.c
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/*
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某个应用程序的随机数产生机制是这样的：
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1、首先产生一个0~0xFFFFFFFF之间的数，称为“密码”X
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2、用(X,0x29A)调用随机数更新函数GenerateRandomNumber，产生新的(Y,Z)
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3、用(Y,Z)调用随机数更新函数GenerateRandomNumber，产生新的(A,B)
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4、把B传给用户
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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？
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非常简单的思路：
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1、循环，从i=0~0xFFFFFFFF
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2、GenerateRandomNumber(i,0x29A)
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3、GenerateRandomNumber(A,B)
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4、判断B是否等于想要找的值
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*/
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#include <stdio.h>
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#include <time.h>
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/* 更新随机数 */
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void GenerateRandomNumber(unsigned int *rand1_h,unsigned int *rand1_l)
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{
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/*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*/
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unsigned long long x = (unsigned long long)*rand1_h;
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x *= 0x6AC690C5;
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x += *rand1_l;
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*rand1_h = (unsigned int)x;
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*rand1_l = (unsigned int)(x>>32);
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}
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void SearchRandomNumber(unsigned int begin_h,unsigned int begin_l, unsigned int search_val)
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{
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/* 在begin_l~begin_h之间，计算B的值，看看是否和search_val相等*/
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unsigned int i;
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unsigned int h,l;
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for (i=begin_l;i<begin_h;i++)
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{
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h = i;
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l = 0x29A;
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GenerateRandomNumber(&h,&l); // 第一次调用
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GenerateRandomNumber(&h,&l); // 第二次调用
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if (l==search_val) // 判断B是否和search_val相等
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{
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printf("找到啦~! 密码是%08X\n",i); // 相等，找到了~~
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}
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}
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}
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int main()
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{
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time_t begin_time,end_time;
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printf("这是一个标准、最慢的搜索程序，拼主频！\n");
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begin_time = time(NULL); // 记录开始时刻
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SearchRandomNumber(0xFFFFFFFF,0,0x39A6FFBB); // 在0~0xFFFFFFFF之间进行搜索
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// 0x39A6FFBB => 0x70FFFFFF
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end_time = time(NULL); // 记录结束时刻
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printf("耗时%ld秒~~\n",end_time-begin_time); // 结束-开始=耗时
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return 0;
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}
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threadlab/计算机系统-实验11.pptx
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threadlab/计算机系统-实验11.pptx
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weblab/index.html
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weblab/index.html
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<!Doctype html>
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<html>
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<head>
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<title><EFBFBD><EFBFBD>ǧ<EFBFBD>ǵ<EFBFBD>Web<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></title>
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</head>
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<body>
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<p><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>~</p>
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<p><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD>ˣ<EFBFBD></p>
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<p><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
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<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>
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<p>˵<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>ó<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>糵</p>
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<p></p>
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<p><EFBFBD><EFBFBD><EFBFBD>ӻ<EFBFBD><EFBFBD><EFBFBD>ǹ<EFBFBD><EFBFBD>~~</p>
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</body>
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</html>
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weblab/www.ini
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weblab/www.ini
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root=c:\adb
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port=80
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weblab/计算机系统-实验10.pptx
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weblab/计算机系统-实验10.pptx
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