Standard C++ Library Copyright 1998, Rogue Wave Software, Inc. NAME multiplies - A binary function object that returns the result of mul- tiplying its first and second arguments. SYNOPSIS #include<functional> template <class T> struct multiplies : binary_function<T, T, T> { T operator() (const T&, const T&) const; }; DESCRIPTION multiplies is a binary function object. Its operator() returns the result of multiplying x and y. You can pass a multiplies object to any algorithm that uses a binary func- tion. For example, the transform algorithm applies a binary operation to corresponding values in two collections and stores the result. multiplies would be used in that algo- rithm in the following manner: vector<int> vec1; vector<int> vec2; vector<int> vecResult; transform(vec1.begin(), vec1.end(),<br> vec2.begin(), vec2.end(),<br> vecResult.begin(), multiplies<int>()); After this call to transform, vecResult(n) contains vec1(n) times vec2(n). WARNINGS If your compiler does not support default template parame- ters, then you always need to supply the Allocator template argument. For instance, you have to write: vector<int, allocator<int> > instead of: vector<int> If your compiler does not support namespaces, then you do not need the using declaration for std. SEE ALSO binary_function, Function_Objects
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