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VMS Help CXXLSTD, Function Objects, times *Conan The Librarian |
Standard C++ Library
NAME
times - A binary function object that returns the result of multiplying
its first and second arguments.
SYNOPSIS
#include<functional>
template <class T>
struct times : binary_function<T, T, T> {
typedef typename binary_function<T, T, T>::second_argument_type
second_argument_type;
typedef typename binary_function<T, T, T>::first_argument_type
first_argument_type;
typedef typename binary_function<T, T, T>::result_type result_type;
T operator() (const T&, const T&) const;
};
DESCRIPTION
times is a binary function object. Its operator() returns the
result of multiplying x and y. You can pass a times object to any
algorithm that uses a binary function. For example, the transform
algorithm applies a binary operation to corresponding values in two
collections and stores the result. times would be used in that
algorithm in the following manner:
vector<int> vec1;
vector<int> vec2;
vector<int> vecResult;
transform(vec1.begin(), vec1.end(), vec2.begin(), vec2.end(),
vecResult.begin(), times<int>());
After this call to transform, vecResult(n) will contain vec1(n) times
vec2(n).
WARNING
If your compiler does not support default template parameters, then
you need to always supply the Allocator template argument. For
instance, you will have to write :
vector<int, allocator>
instead of :
vector<int>
SEE ALSO
binary_function, function objects
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
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