ignoreCaseCompare().

[mora15]

Can someone help me write a function that is called ignoreCaseCompare() that has two character (char) parameters. The function should return true if the two characters received represent the same letter, even if the case does not agree. Otherwise, the function should return false. Then, have a simple main() function that uses my ignoreCaseCompare(). Please any help will be considered helpful, thank you.

[Smac89]

If you are allowed to use c/c++ libraries, a simple method will be:

#include <cctype> // c++
// #include <ctype.h> <-- c library

int ignoreCaseCompare(char a, char b)
{
    return (tolower(a) == tolower(b))
}

There is also strncasecmp if you are on a POSIX system or happen to have the string.h library available to you:
http://linux.die.net/man/3/strncasecmp

If you are not allowed to use any external libraries, there is also bitwise versions of tolower/toupper which you can use instead:

// bitwise tolower
int tolower(char ch)
{
    return ch | 0x20;
}

// bitwise toupper
int toupper(char ch)
{
    return ch & 0x5F;
}

[mora14]

@mora15

This is simply a program where you enter two variables and then write a boolean statement. Try this code:


#include <iostream>

using namespace std;


bool ignoreCaseCompare (char, char);

int main ()
{
char first = ' ';
char second = ' ';
char answer = ' ';

cout << "Enter a letter: ";
cin >> first;
cout << "Enter a letter: ";
cin >> second;

cout << "";
answer = ignoreCaseCompare (first, second);
cout << endl;

return 0;
}

bool ignoreCaseCompare (char one, char two)
{
one = toupper(one);
two = toupper(two);


if (one == two)
cout << "The two letters are the same. ";
else
cout << "The two letters are not the same. ";


system("pause");
return 0; }
//end main function