C versus C++ C++ requires more initial effort than C For simple tasks, C++ makes no sense But - by the time you realize a task is not simple, it may already be in C... A common solution: ...
C++ history There was no A language The BCPL language (1967, now dead) B: a successor of BCPL (1969) C: a successor of B (1970) C++: a superset of C (1983) Both C and C++ are alive Author: Bjarne Stroustrup, 1983 Uses C a...
Comments /* C-style comment, valid also in C++, may be several lines long */ // C++ one line comment // ends with End Of Line We may still use the preprocessor to comment out large blocks of source code #if 0 if (i99) { fprintf(stderr,”index out of range\n”); exit(1); } #endif /* use C comments for...
const, volatile const const int ci =7; volatile volatile int vi=8; i++; i--; i=i+0; const and volatile objects we may call only the const and/or volatile methods for const and/or volatile objects respectively Warning: declaring const and/or volatile method usually causes overloading of th...
Conversion derived - base The conversion from ”pointer to derived” to ” pointer to base” is allowed and automatic without explicit cast operator … if inheritance was public - Why only one-wa...
Conversion operator a.k.a. conversion function / method, it converts object of its own class to other class T::operator X(); Conversion operator of class T to the X type: - no return value specified, - no argument(s) specified, - declared as a class method example: person::operator int(); ...
Copy constructor in derived class It is a constructor so: - Remember the order of constructors: base class(es) constructor(s) will always run - One may supply parameters for base class constructor at initiation list - Remember: also member objects will be constructed class derived:public base { ....
Copy constructor Used for initializing objects using other objects of the same class, for the T class: T::T(const T &); Parameter has to be a reference; otherwise temp. object would be created, that should also be somehow initialized - with the copy constructor! Parameter should be const ...
Declarations are statements in C++ declaration inside block is a statement it may be placed after other statements { int i=12; cout ...
Default function arguments void line(int len, char c='*') { for (int i=0; i...
