C++ Functional Library - logical_or

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Description

It is a logical OR function object class and binary function object class whose call returns the result of the logical "or" operation between its two arguments (as returned by operator ||).

Declaration

Following is the declaration for std::logical_or.

 template <class T> struct logical_or; 

C++11

 template <class T> struct logical_or; 

Parameters

T − It is a type of the arguments and return type of the functional call.

Return Value

none

Exceptions

noexcep − It doesn't throw any exceptions.

Example

In below example explains about std::logical_or.

 #include <iostream> #include <functional> #include <algorithm> int main () { bool foo[] = {true,true,false,false}; bool bar[] = {true,false,true,false}; bool result[4]; std::transform (foo, foo+4, bar, result, std::logical_or<bool>()); std::cout << std::boolalpha << "Logical OR example as shown below:\n"; for (int i=0; i<4; i++) std::cout << foo[i] << " OR " << bar[i] << " = " << result[i] << "\n"; return 0; } 

Let us compile and run the above program, this will produce the following result −

 Logical OR example as shown below: true OR true = true true OR false = true false OR true = true false OR false = false