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如果有课:
class classA { public: int z = 5; };
我理解 RAII 是我写的时候,classA Aobject但是如果我想声明一个全局指针我该怎么办?
classA Aobject
classA *Aobject; int main() { Aobject = new classA; //not RAII cout << Aobject->z << endl; return 1; }
我假设您的意思是您想要声明一个对象,但您不想立即初始化它,可能是因为您还没有正确构造它所需的所有参数。那是对的吗?使用智能指针。
#include <memory> #include <iostream> std::unique_ptr<classA> Aobject; int main() { Aobject.reset(new classA); cout << Aobject->z << endl; return 1; }