C++ 中的作用域解析运算符与 this 指针
作用域解析运算符用于访问静态成员或类成员,而 this 指针用于访问对象成员(如果存在同名局部变量)。
作用域解析运算符
示例
#include<iostream> using namespace std; class AB { static int x; public: // Local parameter 'x' hides class member // 'x', but we can access it using ::. void print(int x) { cout<<"the number is:" << AB::x; } }; // static members must be explicitly defined like below in c ++ int AB::x = 7; int main() { AB ob; int m = 6 ; ob.print(m); return 0; }
输出
the number is:7
this 指针
示例
#include<iostream> using namespace std; class AB { int x; public: AB() { x = 6; } // here Local parameter 'x' hides object's member // 'x', we can access it using this. void print(int x) { cout<<"the number is: " << this->x; } }; int main() { AB ob; int m = 7 ; ob.print(m); return 0; }
输出
the number is: 6
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