c++ g++3.4.5 g++4.8.2 由编译器引起的编译异常

#include <memory>
#include <string>
#include <iostream>class Student {
public:
Student(std::string& name) {
_name = name;
}
~Student(){
} void printName(){
std::cout << _name << std::endl;
}private:
std::string _name;
};int main() {
std::string name = "xiaowang";
std::unique_ptr<Student> p(new Student(name));
//Student p = Student(name);
//p.printName();
p->printName(); return ;
}
编译：默认g++3.4.5 报如下错误，unique_ptr是c++11的， g++3.4.5似乎也不支持这个。main.cpp: In function 'int main()':
main.cpp::: error: 'unique_ptr' is not a member of 'std'
std::unique_ptr<Student> p(new Student(name));
^
main.cpp::: error: expected primary-expression before '>' token
std::unique_ptr<Student> p(new Student(name));
^
main.cpp::: error: 'p' was not declared in this scope
std::unique_ptr<Student> p(new Student(name));后经测试MM提示，改为用
/opt/compiler/gcc-4.8.2/bin/g++ -std=c++11 main.cpp （原来系统还藏了个高版本的，郁闷，干嘛不直接用高版本的啊）编译无误。
^