C++ coding problem

Casarik · #1 16-Aug-2004, 12:43

I'm trying to create a program that is like a airplane seating chart which lists the seats available for reservation and tells the user to choose a seat to reserve. After the user choose a seat, it is suppose to update the chart and place an X on the seats that are now unavailable. I am having trouble creating the code for the update section. Here is what i have so far:

CPP / C++ / C Code:

#include <iostream>
#include <string>

using namespace std;

class seating
{
char chart[8][4];
public:
char choice[2];

seating()
{
for(int i=0;i<8;i++)
{
chart [i][0]='A';
chart [i][1]='B';
chart [i][2]='C';
chart [i][3]='D';
}
}

void getchoice()
{
cout << endl << "Please enter the seat to reserve (enter x to exit): ";
cin >> choice;
}

void updatechart()
{
int row, seat;
bool goodseat;

cout<<endl<<"Updating..."<<endl;
}

void showchart()
{
cout<<endl;

for(int i=0;i<8;i++)
{
cout<<i+1<<" ";
cout<<chart [i][0]<<" ";
cout<<chart [i][1]<<" ";
cout<<chart [i][2]<<" ";
cout<<chart [i][3];
cout<<endl;
}
}
};

int main()
{
seating s;

s.showchart();
s.getchoice();

while(s.choice[0]!='x')
{
s.updatechart();
s.showchart();
s.getchoice();
}

cout<<endl<<"Thank you and good bye.";
cout<<endl<<endl;

return 0;
}

Any help would be appreciated. Thanks in advance.

dsmith · #2 16-Aug-2004, 13:42

Hello Casarik. How about something that makes use of the ASCII values of the characters entered?

CPP / C++ / C Code:

void updatechart()
{
int row, seat;
bool goodseat;

cout<<endl<<"Updating..."<<endl;
row = choice[0]-49;
seat = toupper(choice[1])-65;


if(chart[row][seat] == 'X')
	cout<<"That seat is taken!\n";
else
	chart[row][seat] = 'X';
}

That does absolutely no bounds checking though.

HTH,
d

dabigmooish · #3 21-Aug-2004, 20:47

first off your getchoice function isn't going to work

you have choice[2] declared and then you try to store a value into simply choice. You need to declare which spot your going to assign the value to (either choice[0] or choice[1]). Next the user is gonna enter thier choice as something along the lines of 1A which, and I'm not sure about this (someone can either back me up or correct me) means your gonna have to store the 1 in an int variable and then type cast it to a char.

now once you get that fixed I would just have updatechart() simply put an X in the chart[][] array.Something like:

CPP / C++ / C Code:

void updatechart()
{
     int row = choice[0];
     int seat = choice[1];

     chart[row][seat] = 'X';
}

or if you don't want to make chart public you can make an array that hold which seats are taken and during you showchart() function check for seats already taken.

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