Array of Objects in C++

March 4, 2022

C++

Array of objects in C++ is a type of data structure in the C/C++ programming language that stores a sequential collection of elements of the same type with a fixed length. Arrays are commonly used to store sets of data, but they are also useful when storing a set of variables of the same type. 

The size of the array (the number of variables in the array) is determined at the time of declaration and does not change. Arrays are allocated a contiguous block of memory to store the variables in the array.

All arrays consist of contiguous memory locations. The lowest address corresponds to the first element and the highest address corresponds to the last element of the array.

Array of Objects in C++ have solved the problem of managing multiple variables of the same data type. It is a new way of organizing data types, and is the premise for building later list data types.

Formula of Array of object in C++

To declare an array in C/C++, you specify the type of the element and the number of elements required by the variable as follows:

class_name array_name [size] ;

Note when declaring arrays: 

Must specify the number of elements of the array at the time of declaration. Variables cannot be used to declare the number of elements in an array. 

For example:

#include <iostream>   
class MyClass { 
  int x; 
public: 
  void setX(int i) { x = i; } 
  int getX() { return x; } 
}; 
void main() 
{ 
  MyClass obs[4]; 
  int i; 
  for(i=0; i < 4; i++) 
    obs[i].setX(i); 
  for(i=0; i < 4; i++) 
    cout << "obs[" << i << "].getX(): " << obs[i].getX() << "\n"; 
  getch(); 
}
Output:
obs[0].getX(): 0
obs[1].getX(): 1
obs[2].getX(): 2
obs[3].getX(): 3

Conclusion

Arrays of objects in C++ are a very important part of the C/C++ language. The above are important definitions related to a particular array which are presented more clearly to C/C++ programmers and we hope you enjoy it. If you have any questions do not hesitate to contact us immediately. Thank you for reading; we are always excited when one of our posts can provide useful information on a topic like this!

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