C++

Reference

<valarray>

valarray

public member function
<valarray>

std::valarray::max

T max() const;
Return greatest value
Returns the maximum value contained in the valarray, as if the elements were compared with operator<.

If the valarray has a size of zero, the value returned is unspecified (depends on the particular library implementation).

T shall support being compared with operator<.

Parameters

none

Return value

The greatest value in the valarray.
T is the template argument of valarray (the value type).

Example

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// valarray::max example
#include <iostream>     // std::cout
#include <valarray>     // std::valarray

int main ()
{
  int init[]={20,40,10,30};
  std::valarray<int> myvalarray (init,4);
  std::cout << "The max is " << myvalarray.max() << '\n';

  return 0;
}

Output:

The max is 40


Complexity

Depends on library implementation (operations may be parallelized).

Iterator validity

No changes: Valid iterators, references and sub-arrays keep their validity.

Data races

Both the valarray and its elements are accessed.

Exception safety

If comparing element values with operator< throws an exception, it causes undefined behavior.

See also

valarray::sum
Return sum of elements (public member function)
valarray::min
Return smallest value (public member function)
valarray operators
Valarray operators (function)