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Topic: Operator overloading

Ads by Google Related Topics overload operators Information overload function overloading constructor overloading      Reference.com/Encyclopedia/Operator overloading Because operator overloading allows the programmer to change the usual semantics of an operator, it is usually considered good practice to use operator overloading with care. In computer programming, operator overloading (less commonly known as ad-hoc polymorphism) is a specific case of polymorphism in which some or all of operators like Because of this there is often confusion between operator overrides and operator overloads, and most developers blur any distinction and refer to both as operator overloads, which is semantically incorrect. http://www.reference.com/browse/wiki/Operator_overloading   (328 words)      [No title] An operator such as + may be overloaded by defining writing operator+ as a non-member function or as a member of a class. On the other hand, overloading operator+ as a non-member function may mean that writting the body may be difficult since the non-member version can't directly access the data members of the Money class. C++ classes, on the other hand, allow operations to be implemented as functions (member functions) which are allowed to make changes in an existing value of the class type. http://condor.depaul.edu/~glancast/262class/docs/lecJan16.html   (2779 words)      [No title] The function operator+ is neither a member of the object x nor a member of the object y. Operators can be overloaded either for objects of the user-defined types, or for a combination of objects of the user-defined type and objects of the built-in type.¡ü+ C 8_ï 8_ “0[_\ 8_¨ 0_+ B Ô  Aþ þÿþþþ²ªPª & l  G ¼ó`] Ÿª Ÿ¨·The following is a list of operators that can be overloaded. Since the result of a relational operator is either true or false, the returnType of the function operator== is Boolean. http://www.iit.edu/~akkawif/CS401/links/Lectures/week_2/opoverloading.ppt   (1883 words)      Operator Overloading and "This" To summarize, sometimes you have a choice of defining the overloaded operator function as a member function or a non-member function. NOTE: the point of operator overloading is to be intuitive. The first part is a pen and paper component where you make a table to show your understanding of overloading operators in the two ways discussed above--as member functions and as non-member functions. http://www.cs.uregina.ca/Links/class-info/210/Overloading   (1086 words)      C++ FAQ (part 05 of 11) Operator overloading makes life easier for the users of a class[13.2], not for the developer of the class! Suppose further that your operating system (such as DOS or OS/2) insists on translating "\r\n" into "\n" on input from std::cin, and "\n" to "\r\n" on output to std::cout or std::cerr. But the operator overloading syntax isn't supposed to make life easier for the developer of a class. http://omicron.felk.cvut.cz/FAQ/articles/a4740.html   (5210 words)      Operator Overloading Since the function call operator can only be overloaded by a class member function, the previous reference to price refers to the data member of the object used in combination with the call operator. One reason to overload the function call operator is to provide a shorthand notation for accessing an object's critical data members. When the overloading function returns, its return value is substituted for the original left operand, and the evaluation process is repeated. http://www.cs.cf.ac.uk/Dave/FDDI/CPP/node5.html   (4378 words)      Teach Yourself C++ in 21 Days Overloading class constructors allows you to create flexible classes that can be created from other objects. Remember, the goal of overloading operators is to increase usability and understanding. The precedence order cannot be changed, and the arity of the operator, that is, whether it is unary or binary, cannot be changed. http://newdata.box.sk/bx/c/htm/ch10.htm   (4781 words)      operator+ overloading problem - GameDev.Net Discussion Forums Deleting a NULL pointer is a valid operation (which does absolutely nothing and will not crash). Also, in your operator + you're returning a reference to a temporary object, which is A Bad Thing. The problem is no doubt inside your copy constructor, you need to define one to perform a deep copy, the implicit one is just copying the pointer to the address, and your destructor is calling operator delete on the memory twice, causing the program to crash. http://www.gamedev.net/community/forums/topic.asp?topic_id=258512&whichpage=1�   (1516 words)      Operator Overloading overloading operator "+" between type A and B is in fact overloading the function "operator+(A,B)" or the member function "operator+(B)" of the A class (A must be a class in this case of course). Some special points of operators: - You can only overload operators if at least one operand is a class, structure or reference to class or structure. - the call operator (member function) emulates a function call. http://community.borland.com/article/0,1410,15407,00.html   (272 words)      Andrew Jenner's WebLog : Operator overloading Programmers who are used to a programming language which doesn't offer operator overloads tend to be rather horrified at this concept the first time they see it (I know I was). When overloading operators, it is important to respect the meaning + is addition - is subtraction and so on; just about everyone can agree on the semantics. There is one other argument against operator overloading - that is that it makes it more difficult to see the performance bottlenecks in a program. http://blogs.msdn.com/ajenner/archive/2004/08/05/209312.aspx   (2557 words)      Code Forums - Operator Overloading These operators could have been defined as a member of the class, but then using these operators wouldn't be as convenient as it is now. There is no way one can decently understand and implement operator overloading without understanding the basics of a function that returns a reference. And the overloaded "+" will be overloaded in a different way later (chapter two), to avoid problems that are not relevant now. http://www.codenewbie.com/forum/printthread.php?t=1846   (5321 words)      Operator overloading and inheritence: Code critique please - C++ The usual advise advocated in majority of books is to overload operator+= as a member function and then overload operator+ as non member function in terms of operator+=. And there is a little more convenient approach which requires less typing - use boost operators library. Your source for programming, software development and web development discussions and help. http://www.thescripts.com/forum/thread133379.html   (1710 words)      DaniWeb IT Community - need help with simple overloading operator+ for adding two object data. Nov 16th 2004 07:46 AM need help with simple overloading operator+ for adding two object data. Nov 16th 2004 09:21 AM Re: need help with simple overloading operator+ for adding two object data. Nov 16th 2004 11:14 AM Re: need help with simple overloading operator+ for adding two object data. http://www.daniweb.com/techtalkforums/printthread14123.html   (306 words)      dBforums - Overloading operator+ will result in to an error since the overloaded operator+ function is > will result in to an error since the overloaded operator+ function is for the overloaded function which requires a const String and ???? http://www.dbforums.com/printthread.php?t=1099637   (1107 words)      C Board - having trouble with overloading operator+ Mind I don't really like the idea of having an overloaded operator return something that's of a different type from the input objects. You might even consider adding an operator that works on pointers so you can do both types of addition. Your operator for pointers works just like your current one, something like http://cboard.cprogramming.com/showthread.php?t=58702   (376 words)      Passing by Value This kind of operation is called a shallow copy, as opposed to a deep copy which follows all the pointers. The same kind of value semantics for a user-defined type is accomplished by the use of a copy constructor and an overloaded operator=. In case shallow copy is not enough, you should provide the appropriate copy constructor and overload the assignment operator. http://www.relisoft.com/book/lang/project/14value.html   (3126 words)      [No title] Supply the implementation of an overloaded operator member function. Supply behavior that is analogous to the arithmetic operators; intuitive To learn how to avoid common errors in operator overloading http://www.uwgb.edu/laplantb/CS371/PPT/Horstmann/Ch17   (1310 words)      Problems with overloading operator+ in C++ - LinuxQuestions.org Code assumes NULL is defined and that the < operator is overloaded in the PhoneEntries class (which it is not, yet). I just thought the usage of the for loops was a little unconventional what with all the 3 indexed variables, all with different control logic. http://www.linuxquestions.org/questions/showthread.php?threadid=344802   (2828 words)      Lecture 4: Overloading, Conversions and Constructors A classic example is a string class - where the concatenation operator needs to know about the specific implementation of the underlying string so it can shift data around - but the usual accessor methods only provide the individual characters, not any information about how these characters are stored. That means that to generate a complete working set of classes we need to write 16 addition operators, 16 subtraction operators, blah blah blah... There is only a single actual copy of the operator+ function that is shared by all objects of type Complex. http://www.pcs.cnu.edu/~jhardie/teaching/c231/notes/fall97/lecture4.html   (1977 words)      CSE2305/CSC2050 Topic 19: C++ Operator Overloading C++ solves this problem by allowing non-member¤ operator functions. Note that there are special problems if there are more than one "suitable" operator functions available. , there's a major problem if we want to overload an operator where the first operand isn't a class¤ type http://www.csse.monash.edu.au/~damian/CSC2050/Topics/10.19.OpOverload/html/text.html   (1051 words)      More Effective C++ Item 21: Overload to avoid implicit type conversions There is no point in implementing a slew of overloaded functions unless you have good reason to believe that it will make a noticeable improvement in the overall efficiency of the programs that use , we want to overload on all possible combinations for Back to Item 20: Facilitate the return value optimization http://www.sm.luth.se/~alapaa/file_fetch/MeyersEffectiveCpp/MEC/MI21.HTM   (623 words)      [No title] In fact, many operators MUST be member functions: =, (), [], -> ª šó Ÿ¨Overloading binary operatorsŸ ª óK4 Ÿ¨ExampleŸ ¨ÚThe fraction class. The real solution is to make sure that your operator+ function never returns a double (or any other native type). We will only use operators that are member functions. http://www.d.umn.edu/~jallert/cs1521/C++1Overloading/C++1Overloading.ppt   (358 words)      [No title] Must be by reference so that the object can be modified by the input operation. > input operator is called extraction operator The functions that overload them are called inserters and extractors Use friend functions to overload >> and operators are overloaded in C++ to perform I/O operations The http://iielab-secs.secs.oakland.edu/~cse231/LectureNotes/OOP-6.ppt   (530 words)      [No title] We could make them public, and that might be appropriate in this case, but it’s not a general solution. (how is the precedience of newly defined ops determined?) File I/O and operators So, we’ve now overridden >>, for istream and out own class, and Neither is modified as a result of the operation. http://www.columbia.edu/~mpj9/3101-2/ch07.doc   (1446 words)      [No title] Overloading stream-insertion and stream-extraction operators ª ?  ðñ¢ ð  ð`€ôz¥ ‡¿ ƒ ¿ À Ë œ1Ò Ó Ô Õ ÿ  ?ð¦v- ¬  ðaŸ¨ Input and output objects¡€ ª   ðH ð  ƒð0 ƒ “ ŽŸ‹” Þ½h¿ ÿ  ? ð ÿÿÌ___ÿÌfÿ™3ÌfÌ̙™îÕï €  ð}ððð( ðàY@@ ððª ð sð*€È¥¿ ÿ ˜ˆð€ ° ÐP𠟨Operator Overloading¡ ª   Ÿ ª óû ? Ÿ¨Operator Overloading¡ ª   Ÿ ª óü @ Ÿ¨Operator Overloading¡ ª   Ÿ ª    !"#$%&'()*+,-./0123456789:; We can add a friend function which overload the operator http://www.cs.uiowa.edu/~jni/PCPP/presentation/chap08.ppt   (906 words)      [No title] // Write overloading operator+ with int i passed as parameter and return // object of Counter type. //Write class Counter which implements several versions of overload operator (+). // Write overloading operator+ with double d passed as parameter and return // object of Counter type. http://www.it.lut.fi/kurssit/00-01/010775001/vexercises/ex3/sol/temp3_1.cpp   (143 words)      [No title] The following operators must be overloaded as member functions: = () [] -> All other operators can be implemented as member, non-member, or friend functions. Non-member operator functions must take at least one class argument. C++ lets you overload all operators with the exception of: ::.*. http://spot.pcc.edu/~agroenin/winter04/cs260/lectures/overloading.ppt   (151 words)      Computing Dictionary: O - operational test and evaluation Question.com > Computing Dictionary > O > O - operational test and evaluation Computing Dictionary: O - operational test and evaluation Browse: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Help http://www.question.com/computing_dictionary/alpha/o0.html   (110 words)      [No title] complex operator+(const complex &other) const; //add two complex }; Two ways to invoke a class method operator function complex c1(1.5,0), c2(3.0,1), c3;... (arg1,arg2...){...} operator+ operator= operator>> operator[] //NO whitespace class complex{... > operators as top-level friend functions Shouldn t be a method  Why not ??? Pass stream& into and out of function ostream& operator http://www.cs.sbcc.net/~shouk/s05/ch6f04b.ppt   (338 words)      FreeFEM3D (aka ff3d): Vector< T > Class Template Reference Referenced by Vector< Tetrahedron >::number(), Vector< Tetrahedron >::operator *(), Vector< Tetrahedron >::operator+(), Vector< Tetrahedron >::operator+=(), Vector< Tetrahedron >::operator-(), Vector< Tetrahedron >::operator-=(), Vector< Tetrahedron >::operator=(), and Vector< Tetrahedron >::Vector(). Referenced by Vector< Tetrahedron >::number(), Vector< Tetrahedron >::operator *(), Vector< Tetrahedron >::operator+(), Vector< Tetrahedron >::operator+=(), Vector< Tetrahedron >::operator-(), Vector< Tetrahedron >::operator-=(), Vector< Tetrahedron >::operator=(), and Vector< Tetrahedron >::size(). The documentation for this class was generated from the following file: http://www.freefem.org/ff3d/doxygen/classVector.html   (792 words)      [No title] 670 Five operators cannot be overloaded.,.*, ::, ?:, sizeof These properties cannot be changed Precedence: * has higher precedence than + Associativity: (a + b) + c = a + (b + c) Arity: number of operands that the operator takes (unary & binary operators)¡Ì/ $ #£ /$ # http://www2.hawaii.edu/~walbritt/ics212/overloading/lecture.ppt   (456 words)      [No title] Section: 1.5 Overloading Compiler: Borland C++ Version 5.0 Summer 1996 Object Oriented Programming Using C++, Edition 2 By Ira Pohl *********************************************************************/ //Overloading the operator+. http://www.cse.ucsc.edu/~pohl/OPUS2/ch01/string4.cpp   (78 words)      [No title] This is the feature provided by: Operator Overloading This feature allows you to custom define the meaning of operators like : =, +, -, *, /, +=, >>,.....  ÿþ  ÿþ!  ÿþªR  ðH ð Ì ƒð0 ƒ “ ŽŸ‹” Þ½h¿ ÿ  ? ð ÿÿÿ€€€Ì™33ÌÌÌÿ²²²îÆï€ vðnpðÐðð( ð1$  ðÐðÎ ðÐ ƒð0€”(1¿ ƒ ¿ À ÿ  ð @ð} ðnŸ¨P Such operations are only possible if you can tell the compiler which procedure to invoke in each case.  ÿþ  ÿþª Q ðH ð x ƒð0 ƒ “ ŽŸ‹” Þ½h¿ ÿ  ? ð ÿÿÿ€€€Ì™33ÌÌÌÿ²²²î­ï€ ]ðU@ð ðí ð( ð’ “  ð ðµ ¢ ð ƒð0€Þ° ¿ ƒ ¿ À ÿ  ðÐPN ðU Ÿ¨ Aims of this module In this module we introduce the feature of C++ which allows you to custom define the action of operators for classes. http://www.hep.ucl.ac.uk/~clarke/OOCourse/module9/module9.ppt   (248 words)      operator overloading and inheritance help run virtual plus() on it (which will be overloaded for all of http://nixdoc.net/files/forum/about40694.html   (1116 words)      [No title] };¡m mªP     'óF Ÿ¨Notes on Overloaded OperatorsŸ ¨ÀCan change meaning of an operator Cannot change the number of operands of the operator Only certain operators can be overloaded. .* :: sizeof¡4« «  ª¹  óH Ÿ¨Overloading Types of OperatorsŸ ¨ ++, -- operators overloaded differently for prefix vs. postfix notation Overloaded relational operators should return a bool value Overloaded stream operators >>, http://venus.ece.ndsu.nodak.edu/ece/academics/courses/ece173/s2003/Overheads/chapter13Part2.ppt   (573 words)

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