【C++】类的成员函数中如何调用另一个类的成员函数

Question

#include <iostream>
#include<string>
using namespace std;
class Day {
private:
	int birthday;
public:
	Day(){}
	Day(int inptbirthday){
		birthday = inptbirthday;
	}
	int outbirth() {
		return birthday;
	}
};
class People :public Day{
private:
	int number, id;
	string sex;
	
public:
	People(){
	}
	~People() {
		cout<<"---------------"<<endl;
	}
	void input(int inumber,string isex, int iid,int ipbirth);
	void output();
};
void People::input(int inumber,string isex,int iid,int ipbirth) {
	number = inumber;
	sex = isex;
	id = iid;
}
void People::output(){
	cout << "number \t sex \t id \t" <<"birthday"<< endl;
	cout << number << "\t" << sex << "\t" << id << "\t"<<birth.outbirth()<<endl;
	                                                 // ~~~~~~~~~~~~~~~~问题在这个地方
}
int main() {
	People z3;
	z3.input(1, "man", 233, 20020329);

	z3.output();

	return 0;

}

 

Answer 1

直接用基类的函数名称就行的

cout << number << "\t" << sex << "\t" << id << "\t"<<outbirth()<<endl;

如果和基类同名函数，可以加上基类的前缀

Day::outbirth()