c++11 - 如何解决在此范围内未声明的 “' shared_ptr错误？

Question

我正在尝试在Raspberry Pi上编译带有shared_ptrs的代码:

#include <iostream>
using namespace std;
int main(int argc, char* argv[]){
   shared_ptr<string> message1(new string("Hello Raspberry Pi C++11"));
   cout << *message1 <<endl;
   return 0;
}

我收到以下错误:

test.cpp: In function 'int main(int, char**)': test.cpp:4:4: error: 'shared_ptr' was not declared in this scope
    shared_ptr<string> message1(new string("Hello Raspberry Pi C++11"));
    ^ test.cpp:4:21: error: expected primary-expression before '>' token
    shared_ptr<string> message1(new string("Hello Raspberry Pi C++11"));
                     ^ test.cpp:4:70: error: 'message1' was not declared in this scope
    shared_ptr<string> message1(new string("Hello Raspberry Pi C++11"));

我正在使用以下命令进行编译: g++ -std=c++11 -o test test.cppG++版本是g++(Raspbian 4.8.2-21〜rpi3rpi1)4.8.2

请帮忙。

Answer 1

您需要在文件的开头添加内存头。

#include <memory>