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// Chapter 7, Programming Challenge 20: Theater Seating
#include<iostream>
#include<iomanip>
using namespace std;
const int ROWS = 15;
const int COLS = 30;
const char TAKEN = '*';
const char EMPTY = '#';
void displayMenu();
int getChoice();
void displaySeats(const char Seats[][COLS]);
void displayPrices(const double price[]);
void displaySales(double totalSales);
void purchaseTicket(char seats[][COLS], const double ticketPrice[], double& grandTotal);
int main(){
int choice = 0;
double totalSold = 0;
const char map[ROWS][COLS];
double tickets[ROWS];
for(int r = 0; r < ROWS ; r++){
for (int c = 0; c < COLS; c++){
map[r][c] = EMPTY;
}
}
for (int row = 0; row < ROWS; row++){
cout << "Please enter ticket price for Row " << setw(2) << row+1;
cin >> tickets[row];
}
cout << fixed << showpoint << setprecision(2);
do{
displayMenu();
choice = getChoice();
if (choice == 1){
displaySeats(map);
}
else if (choice == 2){
displayPrices(tickets);
}
else if (choice == 3)
displaySales(totalSold);
else if (choice == 4){
purchaseTicket(map,tickets, totalSold); // <--------------------------------?
}
}while(choice != 5);
return 0;
}
void displayMenu(){
cout << "\n\n\n\t\tC++ Theatre" << endl << endl;
cout << "\n\t1. View Available Seats";
cout << "\n\t2. View Seating Prices";
cout << "\n\t3. View Ticket Sales";
cout << "\n\t4. Purchase a Ticket";
cout << "\n\t5. Exit the Program\n\n";
cout << "\n\tEnter your choice(1-5): ";
}
int getChoice(){
int choice = 0;
while(choice == 0 ){
cin >> choice;
if (choice <= 0 || choice > 5){
cout << "Choice must be between 1 and 5. Please re-enter: ";
choice = 0;
}
}
return choice;
}
void displaySeats(const char seats[][COL]){
const char seats[ROWS][COLS];
cout << "\n\t\tSeats";
cout << "\n 123456789012345678901234567890" << endl;
for(int r = 0; r < ROWS ; r++){
cout << "row " << setw(2) << r+1 << " ";
for(int c = 0; c < COLS; c++){
cout << seats[r][c];
}
}
cout << "\n\n\n\tLegend:\t* = Sold";
cout << "\n\t\t# = Available";
//
cout << "\n\n\nPress the Enter key to continue.";
cin.ignore();
cin.get();
}
void displayPrices(const double price[]){
const double price[ROWS];
cout << "\nTicket Prices By Row " << endl << endl;
cout << " Row Price" << endl;
cout << " --- -----" << endl;
//suggestion use a for loop
for(int row = 0; row < ROWS; row++)
cout << setw(8) << row+1 << setw(10) << price[row] << endl;
cout << "\n\n\nPress the Enter key to continue.";
cin.ignore();
cin.get();
}
void purchaseTicket(char seats[][COLS], const double ticketPrice[], double& grandTotal){
char choice = 'n';
char choice2 = 'n';
int numTickets = 0;
int totalTickets = 0;
int r = 0;
int c = 0;
double totPrice = 0;
double grandTotal = 0;
const double ticketPrice[ROWS];
cout << "\n\t\t C++ Theatre" << endl;
cout << "\t\tTicket Purchase Opportunity" << endl << endl;
//
cout << "Do you wish to view the chart of available seats \n"
<< "before making your selections (y/n)? ";
cin >> choice;
displaySeats();
do{
while(totalTickets < 450){
cout << "\nPlease enter desired row number (1-" << ROWS << "): ";
cin >> r;
if(r <= 0 || r > ROWS){
cout << "Row must be between 1 and "
<< ROWS << ". Please re-enter: ";
continue;
}
cout << "\nPlease enter desired seat number (1-" << COLS << "): ";
cin >> c;
if(c <= 0 || c > COLS){
cout << "Seat must be between 1 and " << COLS << ". Please re-enter: ";
continue;
}
// if the seat is available
else if(seats[r-1][c-1] == TAKEN){
cout << "\nSorry. That seat has been sold.\n";//**********************
continue;
}
else{ // and if it is - sell the ticket
seats[r-1][c-1] = TAKEN;
totPrice += ticketPrice[r-1];
cout << "\nPurchase confirmed\n";
numTickets++;
totalTickets++;
}
}
cout << "\nWould you like to purchase another seat (y/n)? ";
cin >> choice2;
if(totalTickets == 450){
cout << "Sorry, we're sold out!" << endl;
break;
}
else
continue;
}while(choice2 == 'y' || choice2 == 'Y');
cout << "\n\nYou have purchased a total of " << numTickets << " tickets " << "for a total price of $" << totPrice;
grandTotal += totPrice;
}
void displaySales(double totalSales){
cout << "\n\nTotal Sales to Date: $" << totalSales << "\n\n";
}
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In function 'int main()':
19:13: error: uninitialized const 'map' [-fpermissive]
23:23: error: assignment of read-only location 'map[r][c]'
49:41: error: invalid conversion from 'const char (*)[30]' to 'char (*)[30]' [-fpermissive]
14:6: note: initializing argument 1 of 'void purchaseTicket(char (*)[30], const double*, double&)'
At global scope:
79:38: error: 'COL' was not declared in this scope
In function 'void displaySeats(...)':
81:13: error: uninitialized const 'seats' [-fpermissive]
In function 'void displayPrices(const double*)':
103:25: error: declaration of 'const double price [15]' shadows a parameter
103:15: error: uninitialized const 'price' [-fpermissive]
In function 'void purchaseTicket(char (*)[30], const double*, double&)':
128:9: error: declaration of 'double grandTotal' shadows a parameter
129:31: error: declaration of 'const double ticketPrice [15]' shadows a parameter
129:15: error: uninitialized const 'ticketPrice' [-fpermissive]
