Relationships between C and C++ C is almost a subset of C++ You may add only some elements of C++ to your C program C++ overhead is not incurred unless you explicitly ask for it - it's still possible to write small, fast code C++ is stricter: C warnings are usually errors in C++ ...
Standard input and output We may still use C functions (printf etc.) We should use C++ operators Do not mix them! #include using namespace std; ... int a,b,c,d; cout a; cin b; cout c d; Streams are more fault-tolerant than functions ...
Static class members a static class member is shared by all the class objects static members exist even if there are no objects of the class we may access it using the scope operator class ST { static int s; // declaration only int i; public: static int ps; // as above }; int ST::s=0, // defi...
Static methods may be invoked even if there are no objects (using the scope operator) may access static class variables and static methods only there is no ”this” in static methods class ST { static int s; int i; public: static int ps; ST(int i=0) :i(i) { s++; } static void count_us() { cout ...
Stream operators Input friend istream & operator (istream &, T &); Output friend ostream &operator (istream & s, point & p); friend ostream &operator p; cinpp2; cout p.x p.y; return s; } ostream &operator ...
The scope operator as a non-OO C++ extension int fun(); int i; class C { int i; public: void test(); int fun(); }; void C::test() { i++; // C::i++ ::i++; // global i fun(); // C::fun() ::fun(); // global fun() } ...
Variable function argument list in C we write: int printf(char *, …); in C++ a bit simpler: int printf(char * …); // comma not required, but only if // variable preceding ”…” has no default value. // Macros for accessing args in (like in C) ...
Books on C++ Bjarne Stroustrup „Język C++”, WNT International Standard for Information Systems - Programming Language C++ (draft), ANSI Stroustrup B.: Projektowanie i rozwój języka C++. WNT, Warszawa Plauger P. J., Biblioteka sta...
Calling We may specify which one to call: point p3=point(10.0, 20.0); point p2=point(1.0); point p1=point(); or: point p3=point::point(10.0, 20.0); point p3=point::point(1.0); point p1=point::point(); anonymous objects point pu; // non-anonymous object pu pu = point (3); // temporary anonymous ob...
Compiler generated copy constructor if programmer does not define a copy constructor - the compiler generates one other constructors are not important in this case compiler generated copy constructor copies object field by field - base classes and object members with their copy constructors -...
