How to set structure in vector?

Question

C++ / C#

There is a problem. I need to create a file and fill it with the data that I entered into the structure (this is understandable, I did it). Then I need to sort this data alphabetically by name. And here's the problem, I'm trying to sort using sort() , but for this I need to transfer the structure to a vector and I can't do it.
This is the structure:

#pragma once
#include <iostream>

using namespace std;

struct database{
  char myName[124];
  char city[124];
  int age;
};

database recordIn(){
  database infa;
  cin.ignore();
  cout << "Name : ";
    cin >> infa.myName;
  cout << "City : ";
  cin >> infa.city;
  cout << "Age : ";
  cin >> infa.age;
  return infa;
}

Sorting itself:

#pragma once
//#include <iostream>
#include <fstream>
#include <vector>
#include "nameFile.h"
#include "readFile.h"

using namespace std;

void sortFile(){
    database infa;
    vector<database> infa;
    sort(infa.begin(), infa.end(), [](const infa& a, const infa& b) {
        return a.myName < b.myName;
    });
}

And fill in the structure here:

#pragma once
#include <fstream>
#include <iomanip>
#include "nameFile.h"
#include "structRecord.h"

using namespace std;

void writelnFile(){
  int n;
  cout << "n = ";
  cin >> n;
  nameFile();
  ofstream NAME(nameF, ios::binary | ios::app);
  for(int i=0; i<n; i++){
    database infa = recordIn();
    NAME.write((char *)&infa, sizeof(infa));
  }
  NAME.close();
}

I hope for your help.

Answer 1

The matter is that in the comparator values ​​in lines, and pointers on the null character are compared not. You have to do it like this:

struct database{
  std::string myName; //char myName[124];
  std::string city; //char city[124];
  int age;
};

or like this:

sort(infa.begin(), infa.end(), [](const infa& a, const infa& b) {
        return strcmp(a.myName, b.myName) < 0;
    });