Module: Standard C++ Library Library: Algorithms
Function
Algorithm that returns the maximum of a pair of values
#include <algorithm>
namespace std {
template <class T>
const T& max(const T&, const T&);
template <class T, class Compare>
const T& max(const T&, const T&, Compare);
}
The max() algorithm determines and returns the maximum of a pair of values. In the first case, T must satisfy the requirements of LessThanComparable. In the second case, the optional argument Compare defines a binary function object that can be used in place of the default operator<().
max() returns the first argument when the arguments are equal.
//
// max.cpp
//
#include <algorithm> // for max, min
#include <functional> // for greater
#include <iostream> // for cout
int main ()
{
double d1 = 10.0, d2 = 20.0;
// Find minimum.
double val1 = std::min (d1, d2);
// The greater comparator returns the greater of
// the two values.
double val2 = std::min (d1, d2, std::greater<double>());
// Find minimum.
double val3 = std::max (d1, d2);
// The less comparator returns the smaller of
// the two values.
// Note that, like every comparison in the library, max is
// defined in terms of the < operator, so using less here
// is the same as using the max algorithm with a default
// comparator.
double val4 = std::max(d1, d2, std::less<double>());
std::cout << val1 << " " << val2 << " "
<< val3 << " " << val4 << std::endl;
return 0;
}
Program Output:
10 20 20 20
max_element(), min(), min_element()
ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Sections 25.3.7 and 20.1.2
Copyright (c) 1994-2006 Rogue Wave Software, a Quovadx Division.
Licensed under the Apache License, Version 2.0.
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