write code  Give a C++ code example showing the concept of software reusability.     Give an example of polymorphism in C++ code using the concept of virtual functions, late binding and overriding.

Explore the concept of custom operator overloading in C++ and its implications for creating user-defined data types with unique behaviors. Provide an example of such an implementation.

Explain abstraction, encapsulation, information hiding, and formal interfaces in a paragraph. Explain how C++ classes and objects employ these ideas. Include access modifiers in your analysis.

Implement in C Programming 7.8.1: LAB: Calculator Given main(), create the Calculator struct that emulates basic functions of a calculator: add, subtract, multiple, divide, and clear. The struct has one data member called value for the calculator's current value. Implement the Calculator struct and related function declarations in Calculator.h, and implement the related function definitions in Calculator.c as listed below:   Calculator InitCalculator() - initialize the data member to 0.0 Calculator Add(double val, Calculator c) - add the parameter to the data member Calculator Subtract(double val, Calculator c) - subtract the parameter from the data member Calculator Multiply(double val, Calculator c) - multiply the data member by the parameter Calculator Divide(double val, Calculator c) - divide the data member by the parameter Calculator Clear(Calculator c) - set the data member to 0.0 double GetValue(Calculator c) - return the data member Given two double input values num1 and…