1,凡包含std::ios_base::out mode的操作方式,如果文件不存在都是会创建. std::ios_base::out | std::ios_base::app/ate/trunc 这些组合的方式来操作文件,如果指定的路径该文件不存在就会创建一个空的. 2,如果std::ios_base::in 和 std::ios_base_out同时使用就会按照 std::ios_base_in,也就是即使...
std::ios_base::openmodetypedef /*implementation defined*/ openmode; static constexpr openmode app = /*implementation defined*/ static constexpr openmode binary = /*implementation defined*/ static constexpr openmode in = /*implementation defined*/ static constexpr openmode out = /*...
std::basic_ifstream::basic_ifstream std::basic_ifstream::close std::basic_ifstream::is_open std::basic_ifstream::open std::basic_ifstream::rdbuf std::basic_ifstream::swap std::basic_ios std::basic_ios::bad std::basic_ios::basic_ios ...
std::ios_base::openmode typedef/* implementation defined */openmode; staticconstexpropenmode app=/* implementation defined */; staticconstexpropenmode binary=/* implementation defined */; staticconstexpropenmode in=/* implementation defined */; ...
std::ios_base::openmodeC++ 输入/输出库 std::ios_base typedef /*implementation defined*/ openmode; static constexpr openmode app = /*implementation defined*/ static constexpr openmode binary = /*implementation defined*/ static constexpr openmode in = /*implementation defined*/ static const...