C++ Programming Code Examples

Algorithm max - Returns the maximum of the two items. max Header <algorithm> template<class T> const T& _cpp_max(const T& x, const T& y) Returns the maximum of the two items. _cpp_max returns a reference to the larger of the x and y. The non-predicate version uses operator< for comparison. template<class T, BinaryPredicate> const T& _cpp_max(const T& x, const T& y, BinaryPredicate pr) Returns the maximum of the two items. _cpp_max returns a reference to the larger of the x and y. The predicate version uses the predicate function pr for comparison. Microsoft Specific NOTE: To avoid conflicts with max and min in WINDEF.H, use _MAX and _MIN. These macros evaluate to _cpp_max and _cpp_min End Microsoft Specific Samples #pragma warning (disable: 4786) #include <algorithm> #include <iostream> #include <string> struct PhoneBook { PhoneBook(std::string s, long num) { name = s ; number = num ; } friend std::ostream& operator<<(std::ostream&, const PhoneBook&) ; long number ; std::string name ; } ; std::ostream& operator<<(std::ostream& os, const PhoneBook& rpb) { os << rpb.name << "\t" << rpb.number << std::endl ; return os ; } bool compare(const PhoneBook& r1, const PhoneBook& r2) { return (r2.name > r1.name) ; } int main() { //non-predicate version of _MAX std::cout << "_MAX(10, 30) = " << std::_MAX(10, 30) << std::endl ; //non-predicate version of _MIN std::cout << "_MIN(10, 30) = " << std::_MIN(10, 30) << std::endl ; PhoneBook s1("Tom", 8612345) ; PhoneBook s2("Jack", 6782345) ; //predicate version of _MAX std::cout << "_MAX(s1, s2, max_PhoneBook) = " << std::_MAX(s1, s2, compare) << std::endl ; //predicate version of _MAX std::cout << "_MIN(s1, s2, min_PhoneBook) = " << std::_MIN(s1, s2, compare) << std::endl ; return 0 ; } Program Output _MAX(10, 30) = 30 _MIN(10, 30) = 10 _MAX(s1, s2, max_PhoneBook) = Tom 8612345 _MIN(s1, s2, min_PhoneBook) = Jack 6782345