New and delete with classes
Using Normal object
student s1;
In order to invoke a member function using a normal object we use “.” (dot operator),
Example:
student s1;
s1.read();
s1.show();
Using pointer type object
student *p=new student;
whereas in order to invoke a member function using pointer type object we use “->” (arrow operator).
example:
student *p=new student;
p->read();
p->show();
Example:1
Write a C++ program to declare a class named employee with attributes as employee number, employee name, and basic salary. Take input for the details and display them.
#include<iostream>
#include<conio.h>
using namespace std;
class employee
{
private:
int empno;
char name[20];
float sal;
public:
void read();
void show();
};
void employee::read()
{
cout<<"Enter empno, name and salary ";
cin>>empno>>name>>sal;
}
void employee::show()
{
cout<<"empno "<<empno<<" name "<<name<<" sal "<<sal<<endl;
}
int main()
{
//Normal object
employee e1;
e1.read();
e1.show();
//pointer type object
employee *p=new employee;
p->read();
p->show();
return(0);
}
Output:
Enter empno, name and salary 1001
Amit
45000
empno 1001 name Amit sal 45000
Enter empno, name and salary 1002
Kapil
56000
empno 1002 name Kapil sal 56000
