利用宏定義生成getset私有變量函數。
宏的本質就是簡單的文本替換,而宏裏面的##則是拼接字符串 如name##_ 就表示name_
#include <iostream>
using namespace std;
//首先定義get、set變量的宏
#define GETSETVAR(type, name)\
private: \
type name##_;\
public: \
void set_##name(const type& value) {name##_ = value;}\
const type& get_##name(){return name##_;}
//定義一個class測試上面定義的宏
class Test
{
public:
void Print()
{
cout<<"name:"<<name_<<" age :"<<age_<<" gender :"<<gender_<<endl;
}
private:
GETSETVAR(int, age);
GETSETVAR(string, name);
GETSETVAR(string, gender);
};
int main()
{
Test liuqiuyue;
//liuqiuyue.name_="劉秋月"; //私有變量不能訪問
liuqiuyue.set_name("劉秋月");
liuqiuyue.set_age(18);
liuqiuyue.set_gender("女");
liuqiuyue.Print();
cout<<"name:"<<liuqiuyue.get_name()<<" age :"<<liuqiuyue.get_age()<<" gender :"<<liuqiuyue.get_gender()<<endl;
return 0;
}
結果:
name:劉秋月 age :18 gender :女
name:劉秋月 age :18 gender :女