why all c++ program must have default constructor?
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To initialized objects of class, if you do not create your
own.Its a inbuilt feature of C++ compiler.
| Is This Answer Correct ? | 7 Yes | 1 No |
Answer / sourisengupta
When you create a Object with no arguments, the compiler automatically creates a default constructor internally. But when you use parameterized constructor in your code then you need to provide the default constructor in your code so that the compiler does not throw any errors at compile time.
It also depends on compiler. some compiler also supports this feature. then you do not need to write default constructor in the code.
| Is This Answer Correct ? | 5 Yes | 1 No |
Answer / rahin99435
The purpose of constructor is to initialize the class members and allocate necessary resources for them; at runtime.So by default C++ compiler is provided with a default constructor which performs the same job at runtime while the object is created.
There is provision of defining more than one constructor by changing the signatures to get objects of different kind.
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / jayakrishna
In c++ we have constructors for initialising the values for
the variables where destructors are present in order to
deallocate the the memory after completion of the work.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / varsha
Default constructor and destructor gice compilers a place to
hide the code such as invocation of contructors of Base
classes and non static data members.
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / bhuvan singh
a defaulft constructor is created that takes no parameters
and does nothing.that takes no arguments but sets up your
object as required.
A defaulft constructor ,but by no convention so is any
constructor that takes parameters ,this is can be a bit confusing ,but is usually clear from context which one is meant.
A default constructor is not made by the compiler.so if u want a constructor that takes no parameters ,and u,ve created any others constructors ,u must make the default constructor urself.
"that if u make any constructor at all."
| Is This Answer Correct ? | 1 Yes | 5 No |
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