B

Extra Form

#include<iostream> #include<string> using namespace std; class Person { private:         string name, addr, phone; public:         Person(){name=""; addr=""; phone="";}         void setName(string n){name=n;}         void setAddr(string a){addr=a;}         void setPhone(string p){phone=p;}         string getName(){return name;}         string getAddr(){return addr;}         string getPhone(){return phone;} }; class Customer : public Person { private:         string cusno; int mile; public:         Customer(){cusno=""; mile=0;}         void setCusno(string c){cusno=c;}         void setMile(int m){mile=m;}         string getCusno(){return cusno;}         int getMile(){return mile;} }; int main() {         Person p1;         p1.setName("강하늘");         p1.setAddr("서울시");         p1.setPhone("02-123-1230");         cout<<"이름 : "<<p1.getName()<<", 주소 :"<<p1.getAddr()<<                 ", 전화번호 : "<<p1.getPhone()<<endl;         Customer c1;         c1.setName("이겨울");         c1.setAddr("인천");         c1.setPhone("032-123-6040");         c1.setCusno("c-100");         c1.setMile(500);         cout<<"이름 : "<<c1.getName()<<", 주소 :"<<c1.getAddr()<<                 ", 전화번호 : "<<c1.getPhone()<<"n"<<"고객번호 :"<<                 c1.getCusno()<<", 마일리지 :"<<c1.getMile()<<"n"<<endl; }