C++ Arrays

C++ Arrays

Like other programming languages, array in C++ is a group of similar types of elements that have contiguous memory location. In C++ std::array is a container that encapsulates fixed size arrays. In C++, array index starts from 0. We can store only fixed set of elements in C++ array.

Advantages of C++ Array

  • Code Optimization (less code)
  • Random Access
  • Easy to traverse data
  • Easy to manipulate data
  • Easy to sort data etc.

Disadvantages of C++ Array

  • Fixed size

C++ Array Types

There are 2 types of arrays in C++ programming:

  1. Single Dimensional Array
  2. Multidimensional Array

Single Dimensional Array

Let's see a simple example of C++ array, where we are going to create, initialize and traverse array.

    #include <iostream>  
    using namespace std;  
    int main()  
    {  
     int arr[5]={10, 0, 20, 0, 30};  //creating and initializing array    
            //traversing array    
            for (int i = 0; i < 5; i++)    
            {    
                cout<<arr[i]<<"\n";    
            }    
    }  

Output:

10
0
20
0
30

Array Example: Traversal using foreach loop>

We can also traverse the array elements using foreach loop. It returns array element one by one.

    #include <iostream>  
    using namespace std;  
    int main()  
    {  
     int arr[5]={10, 0, 20, 0, 30}; //creating and initializing array    
            //traversing array    
           for (int i: arr)     
            {    
                cout<<i<<"\n";    
            }    
    }  

Output:

10
20
30
40
50