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#ifndef PERSON_H
#define PERSON_H

#include <iostream>
#include <string>

struct Person {
    /*
    Person operator=(const Person &person_p) {

krysseltillada

#ifndef PERSON_H /// header declaration --> if not define 
#define PERSON_H /// then define PERSON_H as a header

#include <iostream> /// std::end; std::cout;
#include <string> /// std::string;

struct Person {
    Person operator=(const Person &person_p) { /// declares a function operator = to mimic a var = var assignment
        name = person_p.name; /// the left operand is the "this object" which is p2 and the right operand which we get in the argument is p1
        address = person_p.address; /// assigning those values

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#include <iostream>  /// std::cout; std::endl;
#include <string> /// std::string;

struct race
{
    void non_const_display() /// for non const just for to differentiate the two functions to understand
    {
        std::cout << "class: " << this->Class << std::endl
                  << "job: " << this->job << std::endl
                  << "level: " << this->level << std::endl

krysseltillada

#include <iostream> /// std::cout; std::endl;
#include <string> /// std::string;

struct person
{
    void display()
    {
        std::cout << "name = " << name << std::endl /// this was initialized and takes the address which this points which is p1 implicitly
                  << "this->name = " << this->name << std::endl /// this points to an object which is p1 and dereference it and accessing those member which is name
                  << "(*this).name = " << (*this).name << std::endl; /// this deference first what this points which is p1 and accessing those member which is name

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#include <iostream> /// std::cout; std::endl; std::cerr;
#include "Sales_data.h" /// Sales_data; o.isbn();

int main ()
{
    Sales_data total;

    if (std::cin >> total) {
        Sales_data trans;

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#include <iostream>
#include <vector>

int display (int, int);

int sum (int n1, int n2)
{
    return n1 + n2;
}

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#include <iostream> /// std::cout; std::endl;
#include <vector> /// std::vector;

int display (int, int);

int sum (int n1, int n2)
{
    return n1 + n2;
}

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#include <iostream>

/// function pointer

int sum (int i, int ii)
{
    return i + ii;
}

int (*ptr_f)(int, int) = sum; /// ptr_f is a function pointer that have a parameters of two int and returns int

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#include <iostream>

/// function pointers
double sample_func (double d1, double d2)
{
    std::cout << __func__ << " was called ";
}

int add (int n1, int n2)
{

krysseltillada

#include <iostream> /// std::cout; std::endl;

void useBigger (const std::string &s1, const std::string &s2, /// function useBigger has a parameters of two reference to const string and one pointer type that has paramters pf two const string and returns bool and returns void
                bool (*pf)(const std::string &, const std::string &))
                {
                    bool valid = pf (s1, s2); /// equivalent as lengthCompare (s1, s2);
                    std::cout << __func__ << " is called "
                              << valid <<std::endl;
                }