摘要：
```cpp std::string data = "This is a sample string."; // convert string to upper case std::for_each(data.begin(), data.end(), "" { c = ::toupper(c); } 阅读全文
摘要：
https://blog.csdn.net/wudishine/article/details/42466831 MD5.h MD5.cpp =========== Poco库 获取文件MD5 调用 std::string strMD5; std::ifstream f1(filename, std 阅读全文