minus(3C++) - minus(3C++)
Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.
NAMEminus
- Returns the result of subtracting its second argument from its
first.
SYNOPSIS
#include<functional>
template <class T>
struct minus : public binary_function<T, T, T>;
DESCRIPTIONminus is a binary function object. Its operator() returns the result of
x minus y. You can pass a minus object to any algorithm that requires a
binary function. For example, the transform algorithm applies a binary
operation to corresponding values in two collections and stores the
result. minus 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(), minus<int>());
After this call to transform, vecResult(n) contains vec1(n)minusvec2(n).
INTERFACEtemplate <;class T>
struct minus : binary_function<;T, T, T> {
T operator() (const T&, const T&) const;
};
WARNINGS
If your compiler does not support default template parameters, 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
Rogue Wave Software 02 Apr 1998 minus(3C++)
