max

     Algorithm

Find and return the maximum of a pair of values

Contents

• Synopsis
• Description
• Example
• See Also

#include <algorithm>

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. The optional argument Compare defines a comparison function that can be used in place of the default operator<. This function can be used with all the datatypes provided by the standard library.

max returns the first argument when the arguments are equal.

//
// max.cpp
//
 #include <algorithm>  
 #include <iostream.h>
 #include <iostream.h>
 int main(void)
 {   
   double  d1 = 10.0, d2 = 20.0;  
  
   // Find minimum 
   double val1 = min(d1, d2);
   // val1 = 10.0     
  
   // the greater comparator returns the greater of the
   // two values.     
   double val2 = min(d1, d2, greater<double>());
   // val2 = 20.0;
  
   // Find maximum
   double val3 = max(d1, d2);
   // val3 = 20.0;
  
   // the less comparator returns the smaller of the two values.
   // Note that, like every comparison in the STL, 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 = max(d1, d2, less<double>());
   // val4 = 20 
   cout << val1 << " " << val2 << " " 
        << val3 << " " << val4 << endl;
 
   return 0;
 }
Output :
10 20 20 20

max_element, min, min_element