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Code Clean Up Help

thylath (11)
Good Afternoon,
I am trying to clean up my code and what I would like to do is find a way to turn the following bit of code into a function. Everything works as intended but I have the same lines of code repeating 3 times because I cannot get them to work inside a function. The code that is repeated follows immediately with the entire program shortly after the break.
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case ECONOMY:
			economySeats(seats);
			cout << "Please select your seat from those available, as indicated by a '*', please select your row : ";
			cin >> r;
			cout << "Please select your aisle : ";
			cin >> aisle;
			aisleConversion(aisle, c);
			if (seats[r - 1][c] == true)
			{
				cout << "That seat is occupied." << endl;
			}
			else if (seats[r - 1][c] == false)
			{
				cout << endl << "You have selected to sit in seat " << r << " in aisle " << aisle << "." << endl;
				seats[r - 1][c] = true;
			}
			businessClassSeats(seats);
			break;


Here is the entire program:
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#include <iostream> //allows use of cout and endl commands
#include <iomanip>  // allows use of manipulation commands (setprecision, ect)


using namespace std; //This line allows you to use cin, cout and endl without the std:: prefix
// function declaration so function can be put after main
void menu(); 
void openSeats(bool seats[][6]);
void firstClassSeat(bool seats[][6]);
void businessClassSeats(bool seats[][6]);
void economySeats(bool seats[13][6]);
int aisleConversion(char aisle, int& c);

//static variables to avoid global variables
static int choice;
static int r;
static int c;
static char aisle;
bool seats[13][6] = {	{0, 0, 1, 0, 1, 1},//Row 1
						{0, 1, 0, 1, 0, 1},//Row 2
						{0, 0, 1, 1, 0, 1},//Row 3
						{1, 0, 1, 0, 1, 1},//Row 4
						{0, 1, 0, 1, 0, 0},//Row 5
						{0, 1, 0, 0, 0, 1},//Row 6
						{1, 0, 0, 0, 1, 1},//Row 7
						{0, 1, 0, 1, 1, 0},//Row 8
						{1, 0, 1, 1, 0, 1},//Row 9
						{0, 1, 0, 1, 1, 1},//Row 10
						{0, 0, 1, 0, 1, 0},//Row 11
						{0, 0, 1, 1, 0, 1},//Row 12
						{0, 0, 0, 0, 1, 0} };//Row 13

//menu choices
static const int DISPLAYSEATS = 1, FIRSTCLASS = 2, BUSINESSCLASS = 3, ECONOMY = 4, QUIT = 9;
int main()//heading of the function main, every program must have a main function
{
	//info line
	cout << "This program allows you to pick a seat for your upcoming flight. " << endl;
	cout << endl;

	//start of loop
	do
	{
		menu(); //show menu function
		switch (choice) //switch start
		{
		//cases to execute functions
		case DISPLAYSEATS: 
			openSeats(seats);
			break;

		case FIRSTCLASS:
			firstClassSeat(seats);
			cout << "Please select your seat from those available, as indicated by a '*', please select your row : ";
			cin >> r;
			cout << "Please select your aisle : ";
			cin	>> aisle;
			aisleConversion(aisle, c);
			if (seats[r - 1][c] == true)
			{
				cout << "That seat is occupied." << endl;
			}
			else if (seats[r - 1][c] == false)
			{
				cout << endl << "You have selected to sit in seat " << r << " in aisle " << aisle << "." << endl;
				seats[r - 1][c] = true;
			}
			firstClassSeat(seats);
			cout << endl;
			break;

		case BUSINESSCLASS:
			businessClassSeats(seats);
			cout << "Please select your seat from those available, as indicated by a '*', please select your row : ";
			cin >> r;
			cout << "Please select your aisle : ";
			cin >> aisle;
			aisleConversion(aisle, c);
			if (seats[r - 1][c] == true)
			{
				cout << "That seat is occupied." << endl;
			}
			else if (seats[r - 1][c] == false)
			{
				cout << endl << "You have selected to sit in seat " << r << " in aisle " << aisle << "." << endl;
				seats[r - 1][c] = true;
			}
			businessClassSeats(seats);
			break; 

		case ECONOMY:
			economySeats(seats);
			cout << "Please select your seat from those available, as indicated by a '*', please select your row : ";
			cin >> r;
			cout << "Please select your aisle : ";
			cin >> aisle;
			aisleConversion(aisle, c);
			if (seats[r - 1][c] == true)
			{
				cout << "That seat is occupied." << endl;
			}
			else if (seats[r - 1][c] == false)
			{
				cout << endl << "You have selected to sit in seat " << r << " in aisle " << aisle << "." << endl;
				seats[r - 1][c] = true;
			}
			businessClassSeats(seats);
			break;
		}
	} while (choice != QUIT); //if 9 is entered quits the program
	system("pause"); //pauses the command window to see program running
	return 0; //ends the program
}

void menu()// sets function type as one that is not returning data to the program, only displays the menu choices, all text
{
	cout << endl;
	cout << "Menu Choices: " << endl;
	cout << endl;
	cout << "Press 1 to display all open seats: " << endl;
	cout << "Press 2 to reserve a first class seat: " << endl;
	cout << "Press 3 to reserve a business class seat: " << endl;
	cout << "Press 4 to reserve an economy class seat: " << endl;
	cout << "Press 9 to exit the program: " << endl;
	cout << "Please enter a selection: ";
	cin >> choice; //variable for selection from menu function
}
void openSeats(bool seats[][6])//shows seat menu
{
	cout << endl << "The current status of the seats on this flight are: . " << endl; 
	
	cout << setw(10) << "A" << setw(5) << "B" << setw(5) << "C" << setw(5) << "D" << setw(5) << "E" << setw(5) << "F" << endl;
	for (size_t row = 0; row < 13; ++row) 
	{
		cout << "Row " << row + 1;
		for (size_t col = 0; col < 6; ++col) 
		{
		if (row < 9)
			cout << setw(5) << (seats[row][col] == false ? '*' : 'X');
		else 
			if (col == 0)
				cout << setw(4) << (seats[row][col] == false ? '*' : 'X');
			else if(col > 0)
				cout << setw(5) << (seats[row][col] == false ? '*' : 'X');
		}
		cout << '\n';
	}
	cout << endl << "Seats available for occupancy are indicated by a *. " << endl;
}
void firstClassSeat(bool seats[][6])
{
	cout << endl << "The following seats are available for reservation: " << endl;
	cout << setw(10) << "A" << setw(5) << "B" << setw(5) << "C" << setw(5) << "D" << setw(5) << "E" << setw(5) << "F" << endl;
	for (size_t row = 0; row < 2; ++row)
	{
		cout << "Row " << row + 1;
		for (size_t col = 0; col < 6; ++col)
			cout << setw(5) << (seats[row][col] == false ? '*' : 'X');
		cout << '\n';
	}
	cout << endl << "Seats available for occupancy are indicated by a *. " << endl;
	}

void businessClassSeats(bool seats[][6])
{
	cout << endl << "The following seats are available for reservation: " << endl;
	cout << setw(10) << "A" << setw(5) << "B" << setw(5) << "C" << setw(5) << "D" << setw(5) << "E" << setw(5) << "F" << endl;
	for (size_t row = 3; row > 2 && row < 8; ++row)
	{
		cout << "Row " << row + 1;
		for (size_t col = 0; col < 6; ++col)
			cout << setw(5) << (seats[row][col] == false ? '*' : 'X');
		cout << '\n';
	}
	cout << endl << "Seats available for occupancy are indicated by a *. " << endl;
}

void economySeats(bool seats[13][6])
{
	cout << endl << "The current status of the seats on this flight are: . " << endl;
	cout << setw(10) << "A" << setw(5) << "B" << setw(5) << "C" << setw(5) << "D" << setw(5) << "E" << setw(5) << "F" << endl;
	for (size_t row = 8; row > 7 && row < 13; ++row)
	{
		cout << "Row " << row + 1;
		for (size_t col = 0; col < 6; ++col)
		{
			if (row < 9)
				cout << setw(5) << (seats[row][col] == false ? '*' : 'X');
			else
				if (col == 0)
					cout << setw(4) << (seats[row][col] == false ? '*' : 'X');
				else if (col > 0)
					cout << setw(5) << (seats[row][col] == false ? '*' : 'X');
		}
		cout << '\n';
	}
	cout << endl << "Seats available for occupancy are indicated by a *. " << endl;
}
int aisleConversion(char aisle, int& c)
{
	switch (aisle)
	{
	case 'A':
		c = 0;
		break;
	case 'B':
		c = 1;
		break;
	case 'C':
		c = 2;
		break;
	case 'D':
		c = 3;
		break;
	case 'E':
		c = 4;
		break;
	case 'F':
		c = 5;
		break;
	}
	return c;
}
jonnin (11444)
its up to you to handle r and c being out of bounds, but something like this?

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void assignseats(bool seatsp[13][6], int r, int c, int aisle)
{	
   	if (!seatsp[r - 1][c])			
			{
				cout << endl << "You have selected to sit in seat " << r << " in aisle " << aisle << "." << endl;
				seatsp[r - 1][c] = true;
				return;
			}
				cout << "That seat is occupied." << endl;		
}


//called by :
assignseats(seats, 2,3, aisle); //etc


this is the trouble with 2-d (and higher) arrays. they are aggravating to use in functions.
Last edited on
dhayden (5798)
Create a reserveSeat() function that takes the start and end rows to display. Then menu options 2-4 become calls to reserveSeat.

Change openSeats() to take start and end row numbers to support reserveSeat.

OpenSeats() logic can be simplified.

AisleConversion() can be done with arithmetic instead of a case statement.


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#include <iostream>				 //allows use of cout and endl commands
#include <iomanip>				 // allows use of manipulation commands (setprecision, ect)

using namespace std;		//This line allows you to use cin, cout and endl without the std:: prefix
// function declaration so function can be put after main
void menu();
void openSeats(bool seats[][6], int from, int to);
void reserveSeat(int fromRow, int toRow);
int aisleConversion(char aisle, int &c);

//static variables to avoid global variables
static int choice;
static int r;
static int c;
static char aisle;
bool seats[13][6] = { {0, 0, 1, 0, 1, 1},	 //Row 1
{0, 1, 0, 1, 0, 1},				 //Row 2
{0, 0, 1, 1, 0, 1},				 //Row 3
{1, 0, 1, 0, 1, 1},				 //Row 4
{0, 1, 0, 1, 0, 0},				 //Row 5
{0, 1, 0, 0, 0, 1},				 //Row 6
{1, 0, 0, 0, 1, 1},				 //Row 7
{0, 1, 0, 1, 1, 0},				 //Row 8
{1, 0, 1, 1, 0, 1},				 //Row 9
{0, 1, 0, 1, 1, 1},				 //Row 10
{0, 0, 1, 0, 1, 0},				 //Row 11
{0, 0, 1, 1, 0, 1},				 //Row 12
{0, 0, 0, 0, 1, 0}
};						 //Row 13

//menu choices
static const int DISPLAYSEATS = 1, FIRSTCLASS = 2, BUSINESSCLASS = 3, ECONOMY = 4, QUIT =  9;
int
main()				//heading of the function main, every program must have a main function
{
    //info line
    cout << "This program allows you to pick a seat for your upcoming flight. " << endl;
    cout << endl;

    //start of loop
    do {
	menu();					 //show menu function
	switch (choice)				 //switch start
	{
	    //cases to execute functions
	case DISPLAYSEATS:
	    openSeats(seats, 0, 12);
	    break;

	case FIRSTCLASS:
	    reserveSeat(0, 1);
	    break;

	case BUSINESSCLASS:
	    reserveSeat(2, 8);
	    break;

	case ECONOMY:
	    reserveSeat(9, 12);
	    break;
	}
    } while (choice != QUIT);			 //if 9 is entered quits the program
    system("pause");				 //pauses the command window to see program running
    return 0;					 //ends the program
}

void
menu()				// sets function type as one that is not returning data to the program, only displays the menu choices, all text
{
    cout << endl;
    cout << "Menu Choices: " << endl;
    cout << endl;
    cout << "Press 1 to display all open seats: " << endl;
    cout << "Press 2 to reserve a first class seat: " << endl;
    cout << "Press 3 to reserve a business class seat: " << endl;
    cout << "Press 4 to reserve an economy class seat: " << endl;
    cout << "Press 9 to exit the program: " << endl;
    cout << "Please enter a selection: ";
    cin >> choice;				 //variable for selection from menu function
}

//shows seat menu for rows "from" to "to" (inclusive)
void
openSeats(bool seats[][6], int from, int to)
{
    cout << endl << "The current status of the seats on this flight are: . " << endl;

    cout << setw(11) << "A" << setw(5) << "B" << setw(5) << "C" << setw(5) << "D" <<
	setw(5) << "E" << setw(5) << "F" << endl;
    for (int row = from; row <= to; ++row) {
	cout << "Row " << setw(2) << row + 1;
	for (size_t col = 0; col < 6; ++col) {
	    cout << setw(5) << (seats[row][col] == false ? '*' : 'X');
	}
	cout << '\n';
    }
    cout << endl << "Seats available for occupancy are indicated by a *. " << endl;
}

void
reserveSeat(int fromRow, int toRow)
{
    openSeats(seats, fromRow, toRow);
    cout <<
	"Please select your seat from those available, as indicated by a '*', please select your row : ";
    cin >> r;
    cout << "Please select your aisle : ";
    cin >> aisle;
    aisleConversion(aisle, c);
    if (seats[r - 1][c] == true) {
	cout << "That seat is occupied." << endl;
    } else if (seats[r - 1][c] == false) {
	cout << endl << "You have selected to sit in seat " << r << " in aisle " << aisle
	    << "." << endl;
	seats[r - 1][c] = true;
    }
    cout << endl;
}

int
aisleConversion(char aisle, int &c)
{
    c = toupper(aisle) - 'A';
    return c;
}
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