Difference Between Constructor and Destructor (With Table)

Constructor and destructor are words that have meanings in their same class. The name constructor was initially used for an object to initialize. A destructor is initially used for a person who helps to delete an object. Both the constructor and destructor are two terms that arise from the same ring, but two have differences.

Constructor vs Destructor

The difference between constructor and destructor is that a constructor is used by a person who helps to allocate an object in a specific term for a specific period, and on the other hand, a destructor is used by a person which helps him or her to dislocate an object in a specific term for a particular period.

There are many functions present and out of those is the function of the constructor, which helps in allocating memory of an object to help it get Initialized. It is very easy to indicate which is a constructor as they are well defined to their name with the same classes. A construction is every time to be named under the section of the class that is public.

There is a certain function in a class for doing things with an object, and one of those is the destructor function in a class which helps to dislocate the objects that were allocated before through a constructor. It is always to be named with the same class of their title by a person.

Comparison Table Between Constructor and Destructor

Parameters of ComparisonConstructorDestructor
Main functionThere is an allocation of the memory of an object in this function.There is a=dis-allocation of memory of an object in this function.
ArgumentsThere is acceptance of arguments in this function.There is no acceptance of any argument in this function.
When it is calledWhen an object is created only at that time, this function is called up.When a program or a block is terminated, only at that time, this function is called up.
Numbers This can be available in numbers in one class.This can be available only in one number in a class.
OverloadingOverloading can take place.Overloading does not take place.

What is Constructor?

There are many functions present and out of those is the function of the constructor, which helps in allocating memory of an object to help it get Initialized. It is very easy to indicate which is a constructor as they are well defined to their name with the same classes. A construction is every time to be named under the section of the class that is public.

There is no type of return in a constructor, which means it isn’t void. In a class, there can usually be more than one constructor. This factor is known as an implicit constructor. These Constructors are also called arguments that are defaulted. They also help to dynamically initialize an object for a person. A constructor does not have the property to inherit nor be virtual.

There in total three types of constructors that is the default constructor, which helps to construct objects without having any arguments having no parameters, the parameterized constructor, which initializes objects with certain arguments which consist of different values and members and the copy constructors, which are totally different from other constructors as they accept the address of an object.

What is Destructor?

There is a certain function in a class for doing things with an object, and one of those is the destructor function in a class which helps to dislocate the objects that were allocated before through a constructor. It is always to be named with the same class of their title by a person.

A destructor is always preceded by a title (~). In short, the destructor function carries out performance in the reverse form of a constructor function by a person when it comes to editing an object in an out view. Unlike in a constructor function, there is always only one destructor in every class. Because of this, they do not accept any kind of argument.

As soon as the control or execution leaves the block, the local objects are destroyed, and in a similar way, a global object is destroyed only when it terminates the entire object. This is basically known as a compiler.

Main Differences Between Constructor and Destructor

  1. In the constructor function, there is allocation of memory of an object, and on the other hand, in the destructor function, there is dislocation of memory of an object.
  2. There is acceptance of arguments in the constructor function, and on the other hand, there is no acceptance of arguments in the destructor function.
  3. When an object is created only at that time, the constructor is called up, and on the other hand, when a program or a block is terminated, only at that time, the destructor is called up.
  4. There can happen the existence of overloading in a constructor function, and on the other hand, there cannot be any kind of overloading in a destructor function.
  5. There is a possibility of having multiple constructors in a class, and on the other hand, there can be only one destructor in a class, unlike a constructor.
  6. An object is always seen in successive order in a constructor function, and on the other hand, an object is always seen in the reverse order of a constructor function in a destructor function.

Conclusion

Excluding all the same features that the constructor and destructor have regarding the number of functions and the same number of classes with having the same name, they do have differences between them. Their differences lie in their features and characteristics and in which form they are used, and in what context a constructor and a destructor are used.

A constructor is which helps to allocate an object for a specific period, and on the other hand, a destructor is which helps to dislocate an object for a particular period. One should know the difference between these two terms that is the constructor and destructor.

References

  1. https://en.cnki.com.cn/Article_en/CJFDTotal-AQSX200502032.htm
  2. https://ieeexplore.ieee.org/abstract/document/5714442/
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