Access Violation Issue with Bubble Sorting/Duplicate Arrays - c++

Question

This program seems to work fine until it goes to display the data after the sort function, it will display by destination but it bypasses displaying by airline. Then it gives the access violation window and I'm not 100% sure on what it even means. If anybody could explain and help that would be much appreciated.
#include <iostream>
#include <string>
using namespace std;
double flight_number[3], number_passengers[3], max_records, max_pass, min_pass;
string airline_name[3], destination[3], duplicate[3];
char reply, swapping;
int row, index[3];
void setup();
void load_arrays();
void display_airline();
void display_destination();
void sort();
int main()
{
setup();
load_arrays();
display_airline();
display_destination();
system("pause");
return 0;
}
void setup()
{
max_records = 3;
max_pass = 275;
min_pass = 50;
}
void load_arrays()
{
for (row = 0; row < max_records; row++)
{
cout << "Charter Number " << row << endl << endl;
cout << "Please enter..." << endl;
cout << "Airline Name----> ";
cin >> airline_name[row];
cout << endl;
cout << "Flight Number----> ";
cin >> flight_number[row];
cout << endl;
cout << "Destination----> ";
cin >> destination[row];
cout << endl;
cout << "Passenger Load----> ";
cin >> number_passengers[row];
cout << endl;
while (number_passengers[row] < min_pass || number_passengers[row] > max_pass)
{
cout << "You have entered an invalid amount of passengers." << endl;
cout << "There must be between 50 and 275 passengers. > ";
cin >> number_passengers[row];
cout << endl;
}
}
}
void display_airline()
{
system("cls");
for (row = 0; row < max_records; row++)
{
duplicate[row] = airline_name[row];
}
sort();
cout << "Airline" << " Flight" << " Destination" << " Passenger" << endl;
cout << "Name" << " Number" << " Load" << endl;
for (row = 0; row < max_records; row++)
{
cout << airline_name[index[row]] << " " << flight_number[index[row]] << " " << destination[index[row]] << " " << number_passengers[index[row]];
cout << endl;
}
}
void display_destination()
{
system("cls");
for (row = 0; row < max_records; row++)
{
duplicate[row] = destination[row];
}
sort();
cout << "Destination" << " Flight" << " Flight" << " Passenger" << endl;
cout << " Name" << " Number" << " Load" << endl;
for (row = 0; row < max_records; row++)
{
cout << destination[index[row]] << " " << airline_name[index[row]] << " " << flight_number[index[row]] << " " << number_passengers[index[row]];
cout << endl;
}
}
void sort()
{
for (row = 0; row < max_records; row++)
{
index[row] = row;
}
swapping = 'Y';
while (swapping == 'Y')
{
swapping = 'N';
for (row = 0; row < max_records; row++)
{
if (duplicate[row] > duplicate[row + 1])
{
swap (duplicate[row], duplicate[row + 1]);
swap (index[row], index[row + 1]);
swapping = 'Y';
}
}
}
}
also this is the full violation error: Unhandled exception at 0x009984F6 in Program 6.exe: 0xC0000005: Access violation reading location 0x03947188.

Answer 1

for (row = 0; row < max_records; row++)
if (duplicate[row] > duplicate[row + 1]).
What's duplicate[row+1] when row==3? You want the sort to go to max_records-1 since it works on pairs of elements rather than individual elements.