Linux unique_ptr 编译错误
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unique_ptr compile error
提问by rahman
I guess this is embarrassing if I told you I cant get this to compile. would you please help me:
如果我告诉你我无法编译它，我想这很尴尬。你能帮我吗：
#include<memory>
using namespace std;
int main()
{
std::unique_ptr<int> p1(new int(5));
return 0;
}
$ gcc main.cpp
main.cpp: In function ‘int main()':
main.cpp:6:2: error: ‘unique_ptr' was not declared in this scope
main.cpp:6:13: error: expected primary-expression before ‘int'
main.cpp:6:13: error: expected ‘;' before ‘int'
$ gcc --version
gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
采纳答案by B?ови?
This is just a guess.
这只是一个猜测。
Most likely you compiled your program like this (or similarly) :
很可能你像这样（或类似地）编译了你的程序：
g++ main.cpp
If you did, then the problem is that g++ uses c++03 as default. To use c++11 features (and std::unique_ptr), you need to use newer version of c++ :
如果你这样做了，那么问题是 g++ 使用 c++03 作为默认值。要使用 c++11 功能（和std::unique_ptr），您需要使用较新版本的 c++：
g++ -std=c++11
or
或者
g++ -std=c++14
and I would recommend to use also -Wall -Wextra -pedantic.
我也建议使用-Wall -Wextra -pedantic.
回答by Sevener
If you are using Code::Blocks, go to Settings > Compiler > Global compiler settings > Compiler settingsand look for the Have g++ follow the C++11 ISO C++ language standard [-std=c++11]and check it!
如果您使用的是Code::Blocks，请转到Settings > Compiler > Global compiler settings > Compiler settings并查找Have g++ follow the C++11 ISO C++ language standard [ -std=c++11]并检查它！
(Code::Blockswill add the -std=c++11for you when compiling)
（Code::Blocks会-std=c++11在编译时为你添加）
