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File .txt with structs

Java90 (11)
Hello!!
I want to know how can I get the information of each contact, I add a contact and save in a file.txt but I don't know how to get the information of contacts when I open my program and select option 2 (show contact).

I do not using Vector or classes or pointers. Thanks a lot.

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#include <iostream>
#include <fstream>   // read and write outfile .txt
#include <cstring>
#include <cstdlib>   // To use system("clear")

using std::ofstream;  // write outfile .txt
using std::ifstream;  // read outfile .txt
using std::ios;
using std::cout;
using std::cin;
using std::endl;
using std::string;

const int LEN = 2;

void Addd(struct Data people[], int reg);  // add_contact_funtion

struct Data
{
   string Naame;
   unsigned int age;
};

int main()
{
   Data people[LEN];  //struct

   cout << endl;
   cout << "\t ////////  ////////  //        //  /////////  //////////  //////// " << endl;
   cout << "\t //        //    //  ////      //      //     //      //  //       " << endl;
   cout << "\t //        //    //  //  //    //      //     //      //  //       " << endl;
   cout << "\t //        //    //  //    //  //      //     //////////  //       " << endl;
   cout << "\t //        //    //  //      ////      //     //      //  //       " << endl;
   cout << "\t ////////  ////////  //        //      //     //      //  //////// " << endl;
   cout << endl;
   cout << "CONTACTS" << endl << endl;

   cout << "1. Add contact." << endl << endl;
   cout << "2. Show contact." << endl << endl;
   cout << "3. Exit" << endl << endl;

   int regi_ter = 0;

   int option;
   cout << "CHOOSE AN OPTION: ";
   cin >> option;
   cin.ignore();
   cout << endl;

   switch (option)
   {
      case 1:
      system("clear");
      Addd(people,regi_ter);
      break;

      case 2:
         cout << "Show contact";
      break;

      case 3:
         cout << "EXIT";
         exit(0);
      break;

      default:
      cout << "Operation invalid.";
      system("clear");
      main();
      break;
   }

   return 0;
}

/// ADD_CONTACT_FUNTION ///

void Addd(struct Data people[], int reg)
{
   cout << "Write the contact information.";
   cout << endl << endl;
   cout << "1. Name: ";
   getline(cin,people[reg].Naame);
   cout << endl;
   cout << "6. Age: ";
   cin >> people[reg].age;
   cin.ignore();
   cout << endl;

   char sn[5];

   do
   {
      cout << "Add contact in the agenda? [S/N]: ";
      cin >> sn;

      if((strcmp(sn,"s")==0)||(strcmp(sn,"S")==0))
      {
         ofstream archivo;
         archivo.open("ContactsAgenda.txt", ios::app);
         archivo << "Name: " << people[reg].Naame << endl;
         archivo << "Age: " << people[reg].age << endl;
         archivo << endl << "---------------------------------------------" << endl << endl;
         archivo.close();

         reg++;

         cout << endl << "Contacto anadido." << endl;

         system("clear");
         main();
      }

      if((strcmp(sn,"n")==0)||(strcmp(sn,"N")==0))
      {
         cout << endl << "Contact added." << endl;

         system("clear");
         main();
      }
   }while ((sn!="S")||(sn!="s")||(sn!="N")||(sn!="n"));
}
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