Function Object in C++

Function objects are objects that work as functions. On an implementation level, however, function objects are objects of a class that implement operator(), with zero to any number of arguments. Although functions and function-pointers can also be classified as function objects, it is the capability of an object of a class that implements operator() to carry state (that is, values in member attributes of the class) that makes it so useful.

Function objects that return a boolean type naturally are used in algorithms that need decision-making.

C++ is a general-purpose programming language developed as an extension of C, and both languages have almost the same syntax. Besides being based on C, C++ is object-oriented, gives a clear structure to programs and allows code to be reused, lowering development costs.

Like C, C++ gives programmers a high level of control over system resources and memory.

One reason why C++ is so effective is its ability to work very closely with hardware. Additionally, as an object-oriented programming language, it offers flexibility in development. This makes it the go-to language when speed and performance are non-negotiable.

What is C plus-plus used for?

Over time, C++ has become a choice language for building fast and reliable software. Its versatility makes it an excellent match for complex applications, embedded systems, and internet of things (IoT) devices. A few of its most common use cases are as follows: