C++ - Under which conditions compiler provide default constructor to an object when no default constructor

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Under which conditions compiler provide default constructor to an object when no default constructor is defined in the class definition?

Total Answers and Comments: 4

Last Update: December 07, 2008 Asked by: Ashish

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Submitted by: Prasad2008

If the class designer has not provided any constructor within the class, but we are trying to create an object of that class without passing any argument , then compiler will provide a default zero argument constructor. But in the same scenario, if we are creating an object and trying to pass argument(s) to the object at the time of its creation, in that case compiler will not provide any one-argument, two-argument constructors etc. It will throw an error.

Above answer was rated as good by the following members:
yzesong

January 09, 2007 08:50:08

RE: Under which conditions compiler provide default co...

Only if the class has no constants and references ( have to initialized upon creation)

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February 08, 2007 22:49:55

RE: Under which conditions compiler provide default co...

also when you create a consturctor with arguments it has to call defaul no argument consturctor :).

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June 10, 2008 11:12:23

Prasad2008

Member Since: June 2008 Contribution: 8

RE: Under which conditions compiler provide default constructor to an object when no default constructor is defined in the class definition?

If the class designer has not provided any constructor within the class but we are trying to create an object of that class without passing any argument then compiler will provide a default zero argument constructor. But in the same scenario if we are creating an object and trying to pass argument(s) to the object at the time of its creation in that case compiler will not provide any one-argument two-argument constructors etc. It will throw an error.

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December 07, 2008 10:29:53

burraganesh

Member Since: December 2008 Contribution: 20

RE: Under which conditions compiler provide default constructor to an object when no default constructor is defined in the class definition?

Unconditional

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