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Types of Constructor in C++
Constructors are special member functions used to initialize objects. There are three types of constructors: 1) default constructors which have no arguments, 2) parameterized constructors which can take arguments to initialize objects, and 3) copy constructors which initialize an object from another existing object. Constructors are automatically called when objects are created, take the class name, and cannot return values or be defined as private. They play an important role in initializing class objects.
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Types of Constructor in C++
- 1. </> G.H PATEL COLLEGEOF ENGINEERING AND TECHNOLOGY TOPIC : CONSTRUCTOR AND ITS TYPES SUBJECT : OBJECT ORIENTED PROGRAMMING WITH C++ (2140705) PREPARED BY : TEJOY VACHHRAJANI (160110116057) BHAVIK VASHI (160110116061) KHYATI VALERA (160110116059) SUBMITTED TO : PROF. BHARGESH PATEL CLASS : B.E. IT (2ND YEAR) BATCH : 1D16
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- 3. Everthought that whatkind of problems cananobject create if it’s not initialised. It’s similar togiving your vehiclethe final gear just during thestartup.
- 4. TheObject What if user didn’tassignme any value initially (by chance he forget) andfinally askme myvalue? I’ll behelpless. Soto makea program robust the object should be initialised every time. And in classwe do this byconstructors...
- 5. •Well! It isaspecial member function that is used for initialization of objects (data members). •A constructor function is called whenever anobject is created. •Constructors are also called when an object is created as a part of another object. What is “ Constructor ” !!!
- 6. Constructor Functionshave “same name” as that ofclassname. Theydo not havereturn types, not even void. May or maynothave parameters. C++has default constructors that are called whenever a class is declared even if no function with the samenameexists Some of it’s characteristics Mind It!
- 7. Theyshould be declaredin“public section”. Theyare invoked “automatically”when objects arecreated. We cannot call it for the already constructed object. Some of it’s characteristics
- 8. THERE ARE3 TYPES OF CONSTRUCTORS:- 1. DEFAULT CONSTRUCTOR 2. PARAMETER CONSTRUCTOR 3. COPY CONSTRUCTOR TYPES OF CONSTRUCTORS
- 9. DEFAULT CONSTRUCTOR BecauseinC++default constructor isthere. Thisconstructor hasno argumentsin it. Default Constructor is also called as no argumentconstructor.
- 10. DEFAULT CONSTRUCTOR Defaultargument is an argument to a function that a programmer isnot required to specify. C++ allow the programmer to specify default arguments that always have avalue, even if one isnot specified when calling the function. For example, in the following function declaration: i n t MyFunc (int a, int b, int c=12) ;
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- 12. PARAMETER CONSTRUCTOR Aparameterized constructor is just one that hasparameters specified in it. We can pass the arguments to constructor function when objectare created. A constructor that can take arguments are called parameterizedconstructors.
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- 15. COPY CONSTRUCTOR CopyConstructoris used to declare and initializeanobject from another object. For example thestatement: abc c2(c1); would define the object c2and at thesame time initializeit to the valueof c1. Theprocess of initializing through acopy constructor isknown ascopy initialization.
- 18. SOMETHING IMPORTANT Automaticallycalled an objectis when created. Wecandefine our ownconstructors A constructor takes the same name as the class name. Wecan’t define a constructor in the private section.