Standard C++ Library
Copyright 1998, Rogue Wave Software, Inc.

NAME

 
greater
 
 - 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;

};
 
 
 

DESCRIPTION

 
 
greater 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  —  Last change: 02 Apr 1998