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// ctype::is example
#include <iostream> // std::cout, std::boolalpha
#include <locale> // std::locale, std::ctype, std::use_facet
int main ()
{
std::locale loc;
const char quote[] = "It is wonderful how much may be done if we are always doing.";
// (Attributed to Thomas Jefferson)
std::cout << '"' << quote << "\"\n";
// single character:
std::cout << "The quote begins with an uppercase letter? ";
std::cout << std::boolalpha;
std::cout << std::use_facet< std::ctype<char> >(loc).is (std::ctype<char>::upper, quote[0]);
std::cout << '\n';
// sequence of characters:
int cx = 0;
std::ctype<char>::mask * masks = new std::ctype<char>::mask [60];
std::use_facet< std::ctype<char> >(loc).is (quote, quote+60, masks);
for (int i=0; i<60; ++i) if (masks[i] & std::ctype<char>::space) ++cx;
std::cout << "The quote has " << cx << " whitespaces.\n";
return 0;
}
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