Using Char to check whether the user inputs the right command.

[rosales5]

I've been trying to finish this airplane seating program I've been working on for a month or two. The problem I have right now is that if the user inputs a number when prompted to enter the column letter he wants, the program goes on to the next step as if the prompt had been answered correctly.

So I originally used string but I heard from Daleth that Char was better, but I don't know how to apply it. I figured out cin.fail, but I've yet to finish this part. Please Help!!!

[rosales5]

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
using namespace std;

struct airplaneseats
{

string column0;

string columnA;
string columnB;
string columnC;
string columnD;
string columnE;
string columnF;


};
void seatchart(airplaneseats, int classchoice)
{

airplaneseats row0 = {" ","A","B","C","D","E","F",};

airplaneseats row2 = {"1","-","-","*","-","*","*"};
airplaneseats row3 = {"2","-","*","-","*","-","*"};
airplaneseats row4 = {"3","-","-","*","*","-","*"};
airplaneseats row5 = {"4","*","-","*","-","*","*"};
airplaneseats row6 = {"5","-","*","-","*","-","-"};
airplaneseats row7 = {"6","-","*","-","-","-","*"};
airplaneseats row8 = {"7","*","-","-","-","*","*"};
airplaneseats row9 = {"8","-","*","-","*","*","-"};
airplaneseats row10 ={"9","*","-","*","*","-","*"};
airplaneseats row11 ={"10","-","*","-","*","*","*"};
airplaneseats row12 ={"11","-","-","*","-","*","-"};
airplaneseats row13 ={"12","-","-","*","*","-","-"};
airplaneseats row14 ={"13","-","-","-","-","*","-"};

if (classchoice == 1)
{
cout<<row0.column0<<"\t"

<<row0.columnA<<"\t"
<<row0.columnB<<"\t"
<<row0.columnC<<"\t"
<<row0.columnD<<"\t"
<<row0.columnE<<"\t"
<<row0.columnF<<endl<<endl

<<row2.column0<<"\t"

<<row2.columnA<<"\t"
<<row2.columnB<<"\t"
<<row2.columnC<<"\t"
<<row2.columnD<<"\t"
<<row2.columnE<<"\t"
<<row2.columnF<<endl<<endl
<<row3.column0<<"\t"

<<row3.columnA<<"\t"
<<row3.columnB<<"\t"
<<row3.columnC<<"\t"
<<row3.columnD<<"\t"
<<row3.columnE<<"\t"
<<row3.columnF<<endl<<endl;
}
else if (classchoice == 2)
{
cout<<row0.column0<<"\t"
<<row0.columnA<<"\t"
<<row0.columnB<<"\t"
<<row0.columnC<<"\t"
<<row0.columnD<<"\t"
<<row0.columnE<<"\t"
<<row0.columnF<<endl<<endl
<<row4.column0<<"\t"

<<row4.columnA<<"\t"
<<row4.columnB<<"\t"
<<row4.columnC<<"\t"
<<row4.columnD<<"\t"
<<row4.columnE<<"\t"
<<row4.columnF<<endl<<endl
<<row5.column0<<"\t"

<<row5.columnA<<"\t"
<<row5.columnB<<"\t"
<<row5.columnC<<"\t"
<<row5.columnD<<"\t"
<<row5.columnE<<"\t"
<<row5.columnF<<endl<<endl
<<row6.column0<<"\t"

<<row6.columnA<<"\t"
<<row6.columnB<<"\t"
<<row6.columnC<<"\t"
<<row6.columnD<<"\t"
<<row6.columnE<<"\t"
<<row6.columnF<<endl<<endl
<<row7.column0<<"\t"

<<row7.columnA<<"\t"
<<row7.columnB<<"\t"
<<row7.columnC<<"\t"
<<row7.columnD<<"\t"
<<row7.columnE<<"\t"
<<row7.columnF<<endl<<endl
<<row8.column0<<"\t"

<<row8.columnA<<"\t"
<<row8.columnB<<"\t"
<<row8.columnC<<"\t"
<<row8.columnD<<"\t"
<<row8.columnE<<"\t"
<<row8.columnF<<endl<<endl;
}
else if (classchoice == 3)
{
cout<<row0.column0<<"\t"

<<row0.columnA<<"\t"
<<row0.columnB<<"\t"
<<row0.columnC<<"\t"
<<row0.columnD<<"\t"
<<row0.columnE<<"\t"
<<row0.columnF<<endl<<endl
<<row9.column0<<"\t"

<<row9.columnA<<"\t"
<<row9.columnB<<"\t"
<<row9.columnC<<"\t"
<<row9.columnD<<"\t"
<<row9.columnE<<"\t"
<<row9.columnF<<endl<<endl
<<row10.column0<<"\t"

<<row10.columnA<<"\t"
<<row10.columnB<<"\t"
<<row10.columnC<<"\t"
<<row10.columnD<<"\t"
<<row10.columnE<<"\t"
<<row10.columnF<<endl<<endl
<<row11.column0<<"\t"

<<row11.columnA<<"\t"
<<row11.columnB<<"\t"
<<row11.columnC<<"\t"
<<row11.columnD<<"\t"
<<row11.columnE<<"\t"
<<row11.columnF<<endl<<endl
<<row12.column0<<"\t"

<<row12.columnA<<"\t"
<<row12.columnB<<"\t"
<<row12.columnC<<"\t"
<<row12.columnD<<"\t"
<<row12.columnE<<"\t"
<<row12.columnF<<endl<<endl
<<row13.column0<<"\t"

<<row13.columnA<<"\t"
<<row13.columnB<<"\t"
<<row13.columnC<<"\t"
<<row13.columnD<<"\t"
<<row13.columnE<<"\t"
<<row13.columnF<<endl<<endl
<<row14.column0<<"\t"

<<row14.columnA<<"\t"
<<row14.columnB<<"\t"
<<row14.columnC<<"\t"
<<row14.columnD<<"\t"
<<row14.columnE<<"\t"
<<row14.columnF<<endl<<endl;
}

}
int main()
{
int classchoice, desiredseatr;
bool bfail;
string desiredseatc = "";
string reply = "";

do
{
cout<<"In which would you like to be seated?"<<endl<<"Please enter 1 for First Class, 2 for Business Class, and 3 for Economy: ";
cin>>classchoice;
bfail = cin.fail();
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(),'\n');
while (classchoice == 0||classchoice >= 4)
{
cout<<"Please enter 1 for First Class, 2 for Business Class, and 3 for Economy: ";
cin>>classchoice;
bfail = cin.fail();
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(),'\n');

}
}while (bfail == true);

cout<<endl<<endl;
seatchart(airplaneseats(), classchoice);

do
{
cout<<"In which row number would you like to be seated?(Enter row number): ";
cin>>desiredseatr;
bfail = cin.fail();
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(),'\n');


}while(bfail == true);


while (classchoice == 1 && desiredseatr > 2)
{
cout<<"\n"<<"Enter a row number that is displayed: ";
cin>>desiredseatr;
bfail = cin.fail();
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(),'\n');
}
while ((classchoice == 2 && desiredseatr < 3)||(classchoice == 2 && desiredseatr >7))
{
cout<<"\n"<<"Enter a row number that is displayed: ";
cin>>desiredseatr;
bfail = cin.fail();
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(),'\n');
}
while ((classchoice == 3 && desiredseatr < 8)||(classchoice == 2 && desiredseatr > 13))
{
cout<<"\n"<<"Enter a row number that is displayed: ";
cin>>desiredseatr;
bfail = cin.fail();
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(),'\n');
}
cout<<"Enter which letter you want your seat: ";
cin>>desiredseatc;

while ((desiredseatc == "G")||(desiredseatc == "g")||(desiredseatc == "H")||(desiredseatc == "h")||(desiredseatc == "I")||(desiredseatc == "i")||(desiredseatc == "J")||(desiredseatc == "j")||(desiredseatc == "K")||(desiredseatc == "k")||(desiredseatc == "L")||(desiredseatc == "l")||(desiredseatc == "M")||(desiredseatc == "m")||(desiredseatc == "N")||(desiredseatc == "n")||(desiredseatc == "O")||(desiredseatc == "o")||(desiredseatc == "P")||(desiredseatc == "p")||(desiredseatc == "Q")||(desiredseatc == "q")||(desiredseatc == "R")||(desiredseatc == "r")||(desiredseatc == "S")||(desiredseatc == "s")||(desiredseatc == "T")||(desiredseatc == "t")||(desiredseatc == "U")||(desiredseatc == "u")||(desiredseatc == "V")||(desiredseatc == "v")||(desiredseatc == "W")||(desiredseatc == "w")||(desiredseatc == "X")||(desiredseatc == "x")||(desiredseatc == "Y")||(desiredseatc == "y")||(desiredseatc == "Z")||(desiredseatc == "z"))
{
cout<<"Error"<<endl<<"Enter a letter that is displayed: ";
cin>>desiredseatc;

}



cout<<endl;
cout<<"Congratulations! Your ticket has been booked.";
cout<<endl<<endl;
cout<<"Would you like to book another seat ticket?(Y or N): ";
cin>>reply;
cout<<endl;
system("pause");

}

[Yanson]

This might help
http://www.cplusplus.com/reference/cctype/isalpha/