example.csv

test.cpp

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <sstream>
#include <vector>

using namespace std;
struct Person {
    int id;
    string name;
    int num;
};
vector<Person> persons;
void write_data(string data)
{
  ofstream myfile;
	myfile.open ("example.csv");
	myfile << data;// "Writing this to a file.\n";
	myfile.close();
  return;
}
void readData()
{

  ifstream rfile;
  rfile.open("example.csv");
  if (!rfile)
  {
      cout << "File not open\n";
      return;
  }

  string line;
  const char delim = ',';

  while (getline(rfile, line))
  {
      istringstream ss(line);
      Person person;
      ss >> person.id; ss.ignore(10, delim);
      getline(ss, person.name,delim);
      ss >> person.num;
      if (ss)
          persons.push_back(person);
  }

}
void display_data()
{
  readData();
  for (unsigned int i=0; i< persons.size(); i++)
      cout << setw(5)  << persons[i].id
           << setw(25) << persons[i].name
           << setw(8)  << persons[i].num
           << '\n';
}
void delete_data(int id)
{
  //string data;
  readData();
  ofstream myfile;
  myfile.open ("example.csv");
  for (unsigned int i=0; i< persons.size(); i++) {
    if (id == persons[i].id) {
      continue;
    }
    myfile << persons[i].id << "," << persons[i].name << "," << persons[i].num << endl;
  }

  myfile.close();
}
int main()
{
  //delete_data(5);
  display_data();
  return 0;
}