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Which among the following is not a necessary condition for constructors?
- a)Its name must be same as that of class
- b)It must not have any return type
- c)It must contain a definition body
- d)It can contain arguments
Correct answer is option 'C'. Can you explain this answer?
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Which among the following is not a necessary condition for constructo...
Constructors are predefined implicitly, even if the programmer doesn’t define any of them. Even if the programmer declares a constructor, it’s not necessary that it must contain some definition.
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Which among the following is not a necessary condition for constructo...
Explanation:
A constructor is a special member function of a class that is used to initialize objects of that class. It is called automatically when an object of the class is created. Constructors have certain rules and conditions that need to be followed. Let's discuss each option and understand why option 'C' is not a necessary condition for constructors.
a) Its name must be same as that of class:
The name of the constructor must be the same as the name of the class it belongs to. This is to ensure that the constructor is automatically called when an object of the class is created. If the names are different, the constructor will not be recognized as a constructor and will not be called.
b) It must not have any return type:
Constructors do not have a return type, not even void. This is because their purpose is to initialize the object and they are automatically called when the object is created. If a return type is specified, it will be treated as a regular member function and not as a constructor.
c) It must contain a definition body:
This option is incorrect. Constructors can have both a definition body and can be defined outside the class definition. Constructors can also be defined inline within the class definition itself. The definition body of a constructor contains the code that is executed when the constructor is called.
d) It can contain arguments:
Constructors can have arguments, and these arguments can be used to initialize the member variables of the class. Arguments in constructors allow for flexibility in initializing objects with different values. If no arguments are specified, the default constructor is called.
Therefore, option 'C' is not a necessary condition for constructors. Constructors can have a definition body, but it is not a mandatory requirement.
A constructor is a special member function of a class that is used to initialize objects of that class. It is called automatically when an object of the class is created. Constructors have certain rules and conditions that need to be followed. Let's discuss each option and understand why option 'C' is not a necessary condition for constructors.
a) Its name must be same as that of class:
The name of the constructor must be the same as the name of the class it belongs to. This is to ensure that the constructor is automatically called when an object of the class is created. If the names are different, the constructor will not be recognized as a constructor and will not be called.
b) It must not have any return type:
Constructors do not have a return type, not even void. This is because their purpose is to initialize the object and they are automatically called when the object is created. If a return type is specified, it will be treated as a regular member function and not as a constructor.
c) It must contain a definition body:
This option is incorrect. Constructors can have both a definition body and can be defined outside the class definition. Constructors can also be defined inline within the class definition itself. The definition body of a constructor contains the code that is executed when the constructor is called.
d) It can contain arguments:
Constructors can have arguments, and these arguments can be used to initialize the member variables of the class. Arguments in constructors allow for flexibility in initializing objects with different values. If no arguments are specified, the default constructor is called.
Therefore, option 'C' is not a necessary condition for constructors. Constructors can have a definition body, but it is not a mandatory requirement.
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Which among the following is not a necessary condition for constructors?a)Its name must be same as that of classb)It must not have any return typec)It must contain a definition bodyd)It can contain argumentsCorrect answer is option 'C'. Can you explain this answer?
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