在C++編程中，this是一個引用類的當前實例的關(guān)鍵字。 this關(guān)鍵字在C++中可以有3個主要用途。
下面來看看看this關(guān)鍵字在C++中的例子，它指的是當前類的字段。
#include <iostream>
using namespace std;
class Employee {
public:
int id; //data member (also instance variable)
string name; //data member(also instance variable)
float salary;
Employee(int id, string name, float salary)
{
this->id = id;
this->name = name;
this->salary = salary;
}
void display()
{
cout<<id<<" "<<name<<" "<<salary<<endl;
}
};
int main(void) {
Employee e1 =Employee(101, "Hema", 890000); //creating an object of Employee
Employee e2=Employee(102, "Calf", 59000); //creating an object of Employee
e1.display();
e2.display();
return 0;
}
輸出結(jié)果如下 -
101 Hema 890000
102 Calf 59000
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