10 2013 档案

摘要：bool _CanSwap(char* str, int start, int end) { while (start = 0; --i) { if (str[i] i; --j) { if (str[j] > str[i]) { std::swap(str[i], str[j]); _strrev(str + i + 1); return true; } } } } _strrev(str); return false;}void PermutationNoRec(char* s... 阅读全文

摘要：This topic describes how to write a move constructor and a move assignment operator for a C++ class. A move constructor enables you to implement move semantics, which can significantly improve the performance of your applications. For more information about move semantics, see Rvalue Reference Decla 阅读全文

摘要：Generated by command:clang -dM -E -x c /dev/null#define _X86_ 1#define __ATOMIC_ACQUIRE 2#define __ATOMIC_ACQ_REL 4#define __ATOMIC_CONSUME 1#define __ATOMIC_RELAXED 0#define __ATOMIC_RELEASE 3#define __ATOMIC_SEQ_CST 5#define __CHAR16_TYPE__ unsigned short#define __CHAR32_TYPE__ unsigned int#define 阅读全文

摘要：Generated by command: gcc -dM -E -x c /dev/null#define __DBL_MIN_EXP__ (-1021)#define __pentiumpro__ 1#define __UINT_LEAST16_MAX__ 65535#define __ATOMIC_ACQUIRE 2#define __FLT_MIN__ 1.17549435082228750797e-38F#define __UINT_LEAST8_TYPE__ unsigned char#define __INTMAX_C(c) c ## LL#define __CHAR_BIT__ 阅读全文

摘要：转眼之间，国庆7天长假就结束了，我也全宅在了父母那里。没有网络，我就开始翻硬盘，发现了以前从看雪上下载的一些CrackMe，很久没碰这些东西了，我也只能找个简单的玩玩了。输入的字符串存储在全局变量中，调用了两个子函数，比较它们的返回值。根据name算出一个值。根据Key算出一个值。验证步骤如下：1. 输入name和key2. check_name(name) == check_key(key)则成功上面两个函数逆出的代码如下：int check_name(const char* name){ int sum = 0; while(char c = *name++) { ... 阅读全文

摘要：多个线程读写同一个shared_ptr对象需要加锁（注意分清shared_ptr对象与shared_ptr管理的对象）。MutexLock mutex;shared_ptr globalPtr;void read(){ shared_ptr localPtr; { MutexLockGuard lock(mutex); localPtr = globalPtr; } // ...}void write(){ shared_ptr newPtr(new Foo()); { MutexLockGuard lock(mut... 阅读全文