Thread: Program gets stuck in infinite loop

Can anyone figure out why this program gets stuck in certain instances? ...Whenever you enter a destination with more than one word for the city name (eg "San Antonio") it goes into an infinite loop of the menu function... I've been wracking my brain, but I can't figure it out!

Thanks,

-Sean

Code:

#include <iostream>
#include <string>

using namespace std;

void initalize(string passengers[][6][4]);
void menu(string passengers[][6][4]);
void enterpass(string passengers[][6][4]);
void dispsingle(string passengers[][6][4]);
void dispall(string passengers[][6][4]);

void initalize(string passengers[][6][4])
{
    int a,b;
    for(a=0;a<10;a++)
    {
        for(b=0;b<6;b++)
        {
            passengers[a][b][0] = "\0";
        }
    }
}

void menu(string passengers[][6][4])
{
    int choice=0;
    while (choice == 0)
    {
        cout << "Menu" << endl << "1) Enter passenger" << endl << "2) Display single passenger info" << endl << "3) Display all passengers" << endl << "4) Exit program" << endl;
        cout << "Selection: ";
        cin >> choice;
        switch (choice)
        {
        case 1:
            {
                enterpass(passengers);
                choice = 0;
                break;
            }
        case 2:
            {
                dispsingle(passengers);
                choice = 0;
                break;
            }
        case 3:
            {
                dispall(passengers);
                choice = 0;
                break;
            }
        case 4:
            {
                cout << "Thank you for using Lab 5!" << endl;
                break;
            }
        }
    }
}

void enterpass(string passengers[][6][4])
{
    int row=0, column=0;
    while (row != -1 && column != -1)
    {
        cout << endl << "Which passenger? (Format: row column) Use 0 0 to stop ";
        cin >> row >> column;
        row -= 1;
        column -=1;
        if (row > 9 || row < -1)
        {
            cout << "Invalid row" << endl;
        }
        else if (column > 5 || column < -1)
        {
            cout << "Invalid column" << endl;
        }
        else if (row > -1)
        {    
            cout << endl << "First name: ";
            cin >> passengers[row][column][0];
            cout << "Last name: ";
            cin >> passengers[row][column][1];
            cout << "Social Security Number: ";
            cin >> passengers[row][column][2];
            cout << "Destination city: ";
            getline(cin, passengers[row][column][3], '\n');
        }
    }
}

void dispsingle(string passengers[][6][4])
{
    int row=-1, column=-1;
    cout << endl << "Enter row and column: ";
    cin >> row >> column;
    row -=1;
    column -= 1;
    if (row < 0 || column < 0 || row > 9 || column > 5)
    {
        cout << "Invalid Passenger!";
        return;
    }
    else 
    {
        cout << endl << "Displaying information for row " << row+1 << ", column " << column+1 << ":" << endl;
        cout << "First name:\t\t\t" << passengers[row][column][0] << endl;
        cout << "Last name:\t\t\t" << passengers[row][column][1] << endl;
        cout << "Social Security Number:\t\t" << passengers[row][column][2] << endl;
        cout << "Destination:\t\t\t" << passengers[row][column][3] << "\n\n";
    }
}

void dispall(string passengers[][6][4])
{
    int a, b;
    for (a=0;a<10;a++)
    {
        if (passengers[a][0][0] != "\0" || passengers[a][1][0] != "\0" || passengers[a][2][0] != "\0" || passengers[a][3][0] != "\0" || passengers[a][4][0] != "\0" || passengers[a][5][0] != "\0")
        {
            cout << "Row " << a+1 << ":\t";
        }
        for (b=0;b<6;b++)
        {
            if (passengers[a][b][0] != "\0")
            {
                cout << passengers[a][b][0] << " " << passengers[a][b][1] << "  ";
            }
            if (b == 5)
            {
                cout << endl;
            }
        }
    }
}

int main()
{
    string passengers[10][6][4]; 
    initalize(passengers);
    menu(passengers);
return 0;
}