Operator having many forms

Code Learning #CPP#4643

Demonstration of a kind of polymorphism with + operator.

Learning Objectives

Understanding how operators can also show polymorphic behaviour.

Source Code

Run Output

12

polymorphism

Code Understanding

int a=5,b=7; int c=a+b; cout<<c<<endl;
Here + (addition operator) is being used for adding two integers

string x=”poly”; string y=”morphism”; string z=x+y; cout<<z<<endl;
Here + (addition operator) is being used for concatenating two string, second one after the first string.

In both cases + acts as a binary operator, but operands are acted differently when their data types are different.

Notes

This code can not be demonstrated in Turbo C++ as you don’t have string datatype there
Many operators are already overloaded by default in C++ library, but programmers can also use there own code to make their own overloading action to overloaded operators.
Since operator overloading is a type of compile time overloading only, so purists consider this also a type of adhoc polymorphism. Read More..

Common Errors

The + operation doesn’t work for c-style (character array with null termination) strings. There one is required to use strcat() function.

Suggested Filename(s): plus-ol.cpp,plus-overloading.cpp

sunmitra| Created: 6-Sep-2018 | Updated: 6-Sep-2018|

Post Views: 657

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Example(s):Palindrome, prime, armstrong, "linear search", reverse etc.


Example(s):1575, 1632, 1539 (Only one at a time)

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