converting characters: uppercase to lowercase

[kz07]

how can i modify my code so it can handle upper and lower case characters.. for this:

cout << "(B)uy, (S)ell, (H)old or (Q)uit: ";
cin >> ans;

what should i add to the code? i added #include <cctype>.

[Ancient Dragon]

after the cin line call either toupper() or tolower() then make the test.

[Asafe]

after the cin line call either toupper() or tolower() then make the test.

No, to test use isupper() or islower() .

[VernonDozier]

No, to test use isupper() or islower() .

Depends on what you're testing. In this case, to test whether a character is 'b' or 'B', use toupper or tolower:

char someChar = 'b';
if (toupper (someChar) == 'B')
{
    cout << "It is either a 'b' or a 'B'.";
}

[SeeTheLite]

Do you need the original input? If not, you can just tolower()(or upper) the entire input, as it will do nothing if it is already lower(or uppercase).