//  Demo program:
//  update name of Student
//  using a member function enter() of Student
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
class Student {
  private:
    string id,name,class_no; // every Student will have these fields
  public:
    Student(){ id="id00";
               name="none";
               class_no="00";
               } // initial values given for very student
    void show() {  // member function to display students details
     cout << left << setw(5) << id <<
             setw(15) << name << class_no << endl;
    }
    void enter(); // enter name only
};
void Student::enter() {  // updates name, but not id and class_no
   cout << "enter name ";
   getline(cin,name);
}
void main() {
 Student x,y; // create 2 students x and y
 x.show();  // display student x "id00  none  00"
 x.enter();  // enter the name "BENG" for student x
 x.show();   //  display "id00 BENG 00" for student x
}
/* output when program is runned
id00 none           00
enter name BENG
id00 BENG           00
*/