0_0_25036119_8613.cpp:1:6: error: found ':' in nested-name-specifier, expected '::' https://www.cnblogs.com/yuxiaohui/p/3204817.html ^ 0_0_25036119_8613.cpp:1:1: error: 'https' does not name a type https://www.cnblogs.com/yuxiaohui/p/3204817.html ^