history

C++, an extension of C, was developed by Bjarne Stroustrup in the early 1980s at Bell Laboratories. C++ provides a number of features that “spruce up” the C language, but more importantly, it provides capabilities for object-oriented programming.

C++ Standard Library

C++ programs consist of pieces called classes and functions. You can program each piece that you may need to form a C++ program. However, most C++ programmers take advantage of the rich collections of existing classes and functions in the C++ Standard Library. Thus, there are really two parts to learning the C++ “world.” The first is learning the C++ language itself; the second is learning how to use the classes and functions in the C++ Standard Library. Throughout the book, we discuss many of these classes and functions. P J. Plauger’s book, The Standard C Library (Upper Saddle River, NJ: Prentice Hall PTR, 1992), is a must read for programmers who need a deep understanding of the ANSI C library functions that are included in C++, how to implement them and how to use them to write portable code.

Execution

Most programs in C++ input and/or output data. Certain C++ functions take their input from cin (the standard input stream; pronounced “see-in”), which is normally the keyboard, but cin can be redirected to another device. Data is often output to cout (the standard output stream; pronounced “see-out”), which is normally the computer screen, but cout can be redirected to another device. When we say that a program prints a result, we normally mean that the result is displayed on a screen. Data may be output to other devices, such as disks and hardcopy printers. There is also a standard error stream referred to as cerr. The cerr stream (normally connected to the screen) is used for displaying error messages. It is common for users to assign cout to a device other than the screen while keeping cerr assigned to the screen, so that normal outputs are separated from errors.

How GCC and GNU works?

From the apple site. \ Open terminal go to to your directory where your .cpp resides.\ ”% gcc -framework CoreServices -o test test.c”\ ”% ./test”\

or \ ”% g++ GuessNumber.cpp -o GuessNumber”\ ”% ./GuessNumber”\

What Is the UML?

The Unified Modeling Language is now the most widely used graphical representation scheme for modeling object-oriented systems. \ An attractive feature of the UML is its flexibility. The UML is extensible (i.e., capable of being enhanced with new features) and is independent of any particular OOAD process. UML modelers are free to use various processes in designing systems, but all developers can now express their designs with one standard set of graphical notations. \ http://www.uml.org