What is constructor?

What is constructor?

A constructor is a class function with the same name as the class itself. It cannot have a return type and may accept parameters. It will be called after the memory allocation to the member variables. Constructor is used to set initial values to members variables.

Example:

 
 
#include <iostream>
#include <string>
#include <conio.h>
using namespace std;
 
class Student
{
public:
     Student()
     {
          m_nAge=0;
          strcpy(m_szName,"");
     };     
     int m_nAge;
     char m_szName[20];
};
 
int main()
{
     Student obj;
     cout<<"Name: "<<obj.m_szName<<"\r\n"<<"Age: "<< obj.m_nAge<<"\r\n";
     getch();
     return 0;
}

Result:
Name:
Age: 0