gcc和g++是什么
https://www.zhihu.com/question/20940822
boost window x64编译
https://www.cnblogs.com/ypdxcn/p/9857830.html
openssl windows x64编译(可以下载lib)
https://zhuanlan.zhihu.com/p/31154924
string 转 char *
string s1 = "abcdeg";
const char *k = s1.c_str();
c++ enum枚举取值
enum value {
continuation = 0x0,
text = 0x1,
binary = 0x2;
};
value::text
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