greater(3C++) - greater(3C++)
Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.
NAMEgreater
- A binary function object that returns true if its first argument is
greater than its second.
SYNOPSIS
#include <functional>
template <class T>
struct greater : binary_function<T, T, bool> {
bool operator() (const T&, const T&) const;
};
DESCRIPTIONgreater is a binary function object. Its operator() returns true if x
is greater than y. You can pass a greater 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 of the function. greater 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(), greater<int>());
WARNINGS
After this call to transform, vecResult(n) contains a 1 if vec1(n) was
greater than vec2(n) or a 0 if vec1(n) was less than or equal to
vec2(n).
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
Function_Objects
Rogue Wave Software 02 Apr 1998 greater(3C++)