What is a copy constructor?

Copy constructor is a special function in C ++ and other languages ​​affected by C ++ that copy the coding object. The programmer does this by adding a copy of the constructor copying and referring to the object. This is primarily the benefit of the programmer by saving time, but also ensuring that the programmer does not enter incorrectly coding of the object. After the copy, it must have another memory indicator or point to the same part that the original object is directed. One of the main disadvantages of the use of copying designers is that they cannot function separately; If the original object is deleted, there will also be a copy. In order to do this, the programmer must first use the declaration to communicate the encoding to perform the copying function. The programmer must also refer to another object, so the object must already be built or there will be a way to make a copy.

The main advantage of using the constructor copierIt is that they save time. Instead of re -flying the same functions and encoding again, the programmer can only add a link and the object will be ready. This has another hidden advantage in consistent and accurate coding. If the original object is coded correctly, the object will also have the correct encoding. Both of these advantages are most evident in complex objects, but programmers can also benefit from copying simple objects.

In C ++ languages ​​many functions require a memory indicator. This says that the function exactly where to search for a certain information in memory or where it can store data. The programmer must enter a new memory indicator when a copy constructor is used; Otherwise, both objects will use the same memory space. It may not look bad on the surface, but it can clean it on irregularities. If, for exampleThen all credit card requests will be stored with a loan request.

Programmers must be careful before the object is deleted, as the constructor objects cannot work separately. If the programmer clears the original object, then the copied object will have nothing to refer. Without the code to the link, the copied object will not be able to perform its task and become unnecessary.