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: : C is a subset of C++ : : In the 1980s Bjarne Stroustrup, a computer scientist, : : took the "C" language and added features of another older : : language, Simula 67, to help him create a language that would : : allow him to easily simulate things he was working on. It was : : called "C++," which is an incremental advance over "C." : : Hence the name, "C++." : : C is a computer language defined by ISO and ANSI, the : : international and American standards bodies. You will : : most often hear references to ANSI C, since the ANSI : : committee first standardized C and the ISO committee : : basically kept the same standard intact. It was originally : : designed for systems programming because it allows programmer : : to write efficient code. C compilers are found on just about : : every Unix system and are now available with most operating : : systems. : : C++ is a language that grew out of C. It began as a : : version of C with extensions for object-oriented programming : : (OOP) and grew into its own language. C++ is basically an : : extension of C's abilities. C++ supports every desirable : : behavior and most of the undesirable ones of C too. : : The only difference is that C++ provides general language : : improvements and Object Oriented functionality. C++ is a : : subset of C because it has many of the same features such : : as efficiency, closeness to the machine and a variety of : : built-in types. This allows experienced C programmers to : : make the smooth transition to C++ without having to learn : : an entirely new language. : : A few examples of the way C++ is an improvement of C are: : : · Comment lines in C use "/* */", while in C++ you : : could just use "//" per line plus it uses C's "/ **/". : : · In C, constants are specified using #define while : : C++ allows any variable to be declared a constant by : : using "const" and uses #define. : : · C++ also allows the program to use the "Swap" : : function, statements can be placed anywhere in the program. : : · C++ is able to overload functions and operators : : All in all, the many new features of C++ proves that it : : is a better version of C. C++ has a stronger type : : checking by checking arguments to functions and reduces : : syntactic errors by reference types. It also allows the : : programmer to create their own classes. If a compiler : : does not say it can compile ANSI C, most C programs are : : valid C++ programs and you can probably use it anyway. : : There are some cases where valid C programs are not valid : : C++ programs, but these are rare.