plus(3C++) - plus(3C++)
Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.
NAMEplus
- A binary function object that returns the result of adding its first
and second arguments.
SYNOPSIS
#include <functional>
template<class T>
struct plus : public binary_function<T, T, T> ;
DESCRIPTIONplus is a binary function object. Its operator() returns the result of
adding x and y. You can pass a plus 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. plus 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(),
vecResult.begin(), plus<int>());
After this call to transform, vecResult(n) contains vec1(n)plusvec2(n).
INTERFACEtemplate<;class T>
struct plus : binary_function<;T, T, T> {
T operator() (const T&, const T&) const;
};
WARNINGS
If your compiler does not support default template parameters, you
always need to supply the Allocator template argument. For instance,
you need 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
Rogue Wave Software 02 Apr 1998 plus(3C++)
