// Demo: correct way to update // : the student using the member function enter() #include#include #include using namespace std; class Student { private: string id,name,class_no; public: Student(){ id="id00"; name="none"; class_no="00"; } void show() { cout << left << setw(5) << id << setw(15) << name << class_no << endl; } void enter(); // enter id,name,class_no }; void Student::enter() { // updates name, but not id and class_no // Note: NO VARIABLES ARE DECLARED HERE // THE id,name,class_no HAS ALREADY BEEN DEFINED IN clsss Student // as this is a MEMBER FUNCTION of Student. // However you may declared other variables (local) // e.g. int i; // to use for looping within the function // if there is a need for it. cout << "enter id " ; getline(cin,id); cout << "enter name "; getline(cin,name); cout << "enter class no "; getline (cin,class_no); } void main() { Student x,y; // create 2 students x and y y.show(); // display student y "id00 none 00" y.enter(); // enter the id="A000",name="AHMAD",class_no="44" y.show(); // display "A000 AHMAD 44" for student y x.show(); // display student x "id00 none 00" } /* output when program is runned id00 none 00 enter id A000 enter name AHMAD enter class 44 A0000 AHMAD 44 id00 BENG 00 */