std::put_time
似乎不起作用。
以下代码段为directly from en.cpp.reference.com。
#include <iostream>
#include <iomanip>
#include <ctime>
int main()
{
std::time_t t = std::time(nullptr);
std::tm tm = *std::localtime(&t);
std::cout.imbue(std::locale("ru_RU.utf8"));
std::cout << "ru_RU: " << std::put_time(&tm, "%c %Z") << '\n';
std::cout.imbue(std::locale("ja_JP.utf8"));
std::cout << "ja_JP: " << std::put_time(&tm, "%c %Z") << '\n';
}
有几个编译器同意put_time不是std库的成员。我的问题是;为什么? put_time是否有效,如果是,那么编译器和选项是否成功编译?
clang ++ 3.5.0-10(基于LLVM 3.5.0),其中-std = c ++ 14抱怨:
main.cc:10:36: error: no member named 'put_time' in namespace 'std'
std::cout << "ru_RU: " << std::put_time(&tm, "%c %Z") << '\n';
~~~~~^
main.cc:12:36: error: no member named 'put_time' in namespace 'std'
std::cout << "ja_JP: " << std::put_time(&tm, "%c %Z") << '\n';
~~~~~^
2 errors generated.
Gcc在版本5.0中添加了对std :: put_time的支持,如Jonathan Wakely所述。
third "compiler" (using cpp.sh)并勾选c ++ 14,给出:
In function 'int main()':
10:31: error: 'put_time' is not a member of 'std'
12:31: error: 'put_time' is not a member of 'std'
我试图在覆盆子pi上编译它;完整的编译器版本信息:
pi@tacarmepi:~/test$ clang++ --version
Raspbian clang version 3.5.0-10+rpi1 (tags/RELEASE_350/final) (based on LLVM 3.5.0)
Target: arm-unknown-linux-gnueabihf
Thread model: posix