Learning cplusplus OOP

Introduction to C++ CS-2303, C-Ter m 2010 1 Introduction to C++ CS-2303 System Programming Concepts (Slides include materials from The C Programming Language, 2 nd edition, by Kernighan and Ritchie and from C: How to Program, 5 th and 6 th editions, by Deitel and Deitel) Slides (shamelessly) borrowed from Prof. Knicki Introduction to C++ CS-2303, C-Ter m 2010 2 Reading • Deitel & Deitel, 5 th edition — Chapter 18 • Deitel & Deitel, 6 th edition — Chapter 15 • For reference:– – Bjarne Stroustrup, The C++ Programming Language: Special Edition – Nicolai M. Josuttis, The C++ Standard Library: A Tutorial and Reference Introduction to C++ CS-2303, C-Ter m 2010 3 An Older Edition of Stroustrup’s Book Stroustrup 3 rd edition Introduction to C++ CS-2303, C-Ter m 2010 4 What Is C++? • (Mostly) an extension of C to include:– – Classes – Templates – Inheritance and Multiple Inheritance – Function and Operator Overloading – New (and better) Standard Library – References and Reference Parameters – Default Arguments – Inline Functions – … • A few small syntactic differences from C Note: Objective C was invented at about the same time, with similar goals. Introduction to C++ CS-2303, C-Ter m 2010 5 Compiling C++ • Use gcc, Visual Studio, etc. • File types .cc, .cp, .cpp, .CPP, .cxx, .c++, .C .h, .H Some of these have special properties. Introduction to C++ CS-2303, C-Ter m 2010 6 In this Topic • Syntax differences between C and C++ • A Simple C++ Example • C++ Input/Output • C++ Libraries • C++ Header Files • References and Reference Parameters • Call by Reference in C++ Introduction to C++ CS-2303, C-Ter m 2010 8 Background • C++ was developed by Bjarne Stroustrup at Bell Laboratories – Originally called “C with classes” – The name C++ is based on C’s increment operator (++) • Indicating that C++ is an enhanced version of C • Widely used in many applications and fields • Well-suited to “Programming in the Large” Introduction to C++ CS-2303, C-Ter m 2010 9 A Simple C++ Example — D&D Figure 18.1 // C++ simple example #include <iostream> //for C++ Input and Output int main () { int number3; std::cout << "Enter a number:"; std::cin >> number3; int number2, sum; std::cout << "Enter another number:"; std::cin >> number2; sum = number2 + number3; std::cout << "Sum is: " << sum <<std::endl; return 0; } standard output stream object stream insertion operator stream extraction operator standard input stream object stream manipulator Concatenating insertion operators C++ style comments Introduction to C++ CS-2303, C-Ter m 2010 10 A Simple C++ Program • <iostream> – Must be included for any program that outputs data to the screen or inputs data from the keyboard using C++ style stream input/output. – Replaces <stdio.h> of C • C++ requires you to specify the return type, possibly void, for all functions. – Specifying a parameter list with empty parentheses is equivalent to specifying a void parameter list in C. Introduction to C++ CS-2303, C-Ter m 2010 11 • Stream manipulator std::endl – Outputs a newline. – Flushes the output buffer • The notation std::cout specifies a name (cout ) that belongs to the namespace std. Notes on Simple C++ Program Note: std::ends flushes the buffer but does not add newline. Namespace: a generalization of scope. C++ allows access to multiple namespaces with the ' :: ' operator