CString，char *，string的转换

• CString:MFC字符串
• string:STL字符串

1. char *与CString的转换

//char * -> CString
char * p2 = "ccc";
CString str = CString(p3);
//CString -> char *
CStringA tmp;
tmp = str;
char *pp = tmp.GetBuffer();

2. CString和string之间转换要用char* 做桥梁

3. string 与 char*的转换 用 .c_str()；