1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
// Program displays the seat diagram for an airplane and allows the user
// to select a seat. If the seat is available, the program marks it as taken
// and displays a new diagram. If the seat is not available, the program says
// so and asks for another selection. The program terminates when the user
// asks to stop or all seats are taken.
#include <iostream>
using namespace std;
const int NUMROWS = 7;
const int NUMSEATS = 4;
void initPlane(char plane[NUMROWS][NUMSEATS]);
void printPlane(char msg[], char plane[NUMROWS][NUMSEATS]);
void getSeat(char &row, char &seat);
int main()
{
int seatsTaken = 0;
int seats = NUMROWS * NUMSEATS;
char plane[NUMROWS][NUMSEATS];
char keepGoing = 'y';
char row, seat;
int rowIndex, seatIndex;
initPlane(plane);
cout << "Choose your seat!" << endl;
while (seatsTaken < seats && keepGoing == 'y')
{
// Show layout and get seat choice
printPlane("Plane layout; X designates taken seats", plane);
getSeat(row, seat);
// Adjust input to use as indices
rowIndex = row - '1';
seatIndex = seat - 'A';
// Check to see if seat is taken
if (plane[rowIndex][seatIndex] == 'X')
cout << "Sorry, " << row << seat << " is already taken." << endl;
else
{
cout << "OK, you've got " << row << seat << endl;
plane[rowIndex][seatIndex] = 'X';
seatsTaken++;
}
// If there are seats left, see if we should keep going
if (seatsTaken < seats)
{
cout << "Choose another seat? (y/n) ";
cin >> keepGoing;
}
else
cout << "Plane is now full!" << endl;
}
printPlane("Final seating chart", plane);
return 0; // successful completion
}
void initPlane(char plane[NUMROWS][NUMSEATS])
{
// POSTCONDITION:
// plane[x][0] == 'A', 0<=x<=6
// plane[x][1] == 'B', 0<=x<=6
// plane[x][2] == 'C', 0<=x<=6
// plane[x][3] == 'D', 0<=x<=6
int i, j;
for(i=0; i<NUMROWS; i++)
for(j=0; j<NUMSEATS; j++)
plane[i][j] = 'A' + j;
return;
}
void printPlane(char msg[], char plane[NUMROWS][NUMSEATS])
{
// POSTCONDITION: The seating layout of the plane has been printed
// to the standard output with an X displayed for each taken seat.
// print the header message
cout << msg << endl;
// print the seating layout of the plane
// put an extra blank for an aisle in the middle when printing each row
int i,j;
for( i = 0; i< NUMROWS; i++)
{
cout << i+1 <<" ";
for(j=0;j<NUMSEATS;j++)
{
cout << plane[i][j]<<" " ;
cout << endl;
}
}
return;
}
void getSeat(char &row, char &seat)
{
int i,j;
// POSTCONDITION: '1' <= row <= '7', 'A' <= seat <= 'D'
// Get row and seat from user.
// row must be between '1' and '7'. seat must be between 'A' and 'D'.
// Note that getSeat does not check to see if the seat has been taken.
cout << "Enter the row(1-7) you would like: ";
// validate the row is a character between '1' and '7'
cin>>row;
cout << "Enter the seat(A-D) you would like: ";
// validate the seat is a character between 'A' and 'D'
cin>>seat;
i=row-'0';
j=toupper(seat)-'A';
while(i<1||i>NUMROWS||j>NUMSEATS||j<0)
{
cout<<"invalid seat, reenter\n";
cin>>row;
cin>>seat;
i=row-'0';
j=toupper(seat)-'A';
}
seat=toupper(seat);
return;
}
/*
Example seating chart with 2A and 3D taken:
Plane layout; X designates taken seats
1 A B C D
2 X B C D
3 A B C X
4 A B C D
5 A B C D
6 A B C D
7 A B C D
*/
|
