Question

Objective: Learn how to

-- read string from a file

-- write multiple files

Problem: Modify the Person class in Lab #4. It has four private data members firstNam (char[20]), day, month, year (all int); and two public member functions: setPerson(char *, int, int, int) and printInfo(). The function setPerson sets the first name and birthday in the order of day, month and year. The function printInfo prints first name and birthday. But it should print the date in the form: March 12, 2019 if the inputted string is 03/12/2019. You must separate three files: put the class definition and const months in a header file, put the definition of the member functions in a cpp file. Prepare a file called namelist.txt and type some names and birthdays with format of John 12/06/1996 in the file. In the main program, declare an array of objects with type Person and 10 elements, then use for or while loop to repeatedly read one line of words from the file, call strtok_s to separate the first name, day, month and year, and call setPerson to set the data members for each element (you may assume each line in the file has exact two words, so you don’t need to verify them. After finishing reading all names in the files, call the printInfo() function for each element which has values.

Requirements: Must use multiple files.

Answer 1

Below is the Code according to the given problem.

Prerequisite:make textfile to read.

Header File:

a.h

class Person
{ private:
char[20] firstNam;
   int day;
   int month;
   int year;
    public:
       setPerson(char *, int, int, int);
           printInfo();
};

CPP FILE

a.cpp

#include "a.h"

public void setPerson(String name,int d,int m,int y)
   {
       firstNam=name;
       day=d;
       month=m;
       year=y;
   }
   public void printInfo()
   {
       cout<<"Name"<<firstNam<<endl;
       cout<<"Birthday"<<day<<"/"<<month<<"/"<<"year"<<endl;
   }

MAIN FILE

main.cpp

#include<iostream>
#include<fstream>
#include<string>
#include "a.h"
using namespace std;

int main()
{
   int i,j=0;
   Person p[10];
   ifstream myfile ("namelist.txt");
   String line;
  
if (myfile.is_open())
{

   while(getline(myfile, line, ' '))
{
tokens.push_back(line);
}
  
  
for(int i = 0; i < 10; i++)
{
  
   p[i].setPerson(tokens[j],tokens[j+1],tokens[j+2],tokens[j+3])
   p[i].printInfo();
}
  
myfile.close();
}

else cout << "Unable to open file";

return 0;
   }
  
}

Hope Solution is understandable and please give the proper feedback so I can Improve Myself.