0_0_17075865_25957.cpp 0_0_17075865_25957.cpp(16) : error C2446: “:”: 没有从“int”到“std::basic_ostream<char,std::char_traits<char>>”的转换 class“std::basic_ostream<char,std::char_traits<char>>”的构造函数声明为“explicit”