// counts the number of letters in input line

#include <iostream>
#include <exception>

int main()
{
    try{
        char c(0);
        int lettercount(0);
        std::cout << "Please type in a line of text.\n";

        do
        {
        c = std::cin.get();

        if(not std::cin)
                throw std::exception();

        if(c == '\n')
            break;

        if(c >= 65 && c <= 90) // is uppercase
        {
            ++lettercount;
        }


        if(c >= 97 && c <= 122) // lowercase
        {
            ++lettercount;
        }

        } while(true);

        std::cout << "You typed in " << lettercount << " letters\n";
    }

    catch(...)
    {
        std::cerr << "***An exception was thrown.***\n";
    }

}