#include
using std::cout;
using std::endl;
#include
using std::isalnum;
using std::isalpha;
using std::isdigit;
using std::isxdigit;
int main()
{
cout << "According to isdigit:\n"
<< ( isdigit( '8' ) ? "8 is a" : "8 is not a" ) << " digit\n"
<< ( isdigit( '#' ) ? "# is a" : "# is not a" ) << " digit\n";
return 0;
}
According to isdigit:
8 is a digit
# is not a digit