Function overloading in c++
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This document discusses function overloading in C++. It explains that function overloading allows multiple functions to have the same name but different signatures. A function's signature is defined by its argument list, specifically the number, data types, and order of its arguments. Overloaded functions are differentiated based on these signatures. The document provides examples of overloaded functions and function calls, and notes that an ambiguous call could occur if two functions have identical signatures.
Function overloading in c++
- 2. At the end of this tutorial you will be able to • Explain function signature. • Differentiate functions on the basis of their signature. • Explain function overloading. • Identify overloaded functions from a given c++ program. • Identify which function will execute on a call to overloaded function. • Identify an ambiguous function call. • Write overloaded functions in a c++ program. www.learnbywatch.com | [email protected]
- 3. Function Overloading / Function Polymorphism • Polymorphism (बहुरूपता) means having many forms. • Function polymorphism: A function in many forms. • The process of creating same named functions is called function overloading. • Such functions are called overloaded functions. • In C++ two functions can have same name as long as their signatures are different. www.learnbywatch.com | [email protected]
- 4. Function Signature / Argument List • Argument list of a function defines it’s signature. • Signature of a function is different if any one of the following is different. • Number of arguments, • Data Type of arguments and • Order of arguments. www.learnbywatch.com | [email protected] void setTime( ); void setTime(int hh); void setTime(int hh, double mm); void setTime(double hh); void setTime(double mm, int hh);
- 5. Call an overloaded function • void setTime( ); • void setTime(int hh); • void setTime(int hh, double mm); • void setTime(double hh); • void setTime(double mm, int hh); • setTime(12.5) • setTime(12.5 , 7) • setTime() • setTime(7, 12.5) • setTime(7) www.learnbywatch.com | [email protected]
- 6. Ambiguous Call • void setTime(int hh, double mm); • void setTime(double mm, int hh); • setTime(5, 1.2) • setTime(4.2, 5) • setTime(2, 3) • setTime(2.1, 4.5) www.learnbywatch.com | [email protected]
- 7. Ask your questions to learn better Yogendra Pal www.learnbywatch.com | [email protected]