How To Declare An Empty Array in C++

Are you new to C++ and trying to figure out how to declare an Empty Array? This article will teach you how to declare and initialize an Empty array in C++.

This can be accomplished in a variety of ways. I’ll go over two methods for declaring or initializing an empty array in C++.

The first method is to simply initialize the array using the C++ array initialization syntax, and the second method is to declare an empty array in C++ using a fixed size and a value of zero.

1. Declare An Empty Array with Fixed Size

So, at the start of the program, you might want to initialize an array with a fixed size, but you might also want to initialize the array with a limit.

In the following example code, we will see how to declare an empty array with a fixed size in C++.

#include <iostream>

using namespace std;
 
int main()
{
    //Initiliazing an Integer Empty Array
    int emptyArray[10];

    cout<<emptyArray[0];

    return 0;
}

Output:

-712436000

As you can see in the code above, I haven’t assigned any value to the empty array and have only declared it with 10 integer elements. If you try to print or generate an output of an empty array in C++, the compiler assigns a random value to each element of the array if you have not assigned one to avoid runtime errors.

2. Declare An Empty Array with Fixed Size and Value

To get around the above-mentioned issue, you can initialize the array with a fixed size and a specific value. In this case, all of the elements will be assigned to the number zero rather than some random value assigned by the C++ interpreter, so you can use the code below as an example.

#include <iostream>

using namespace std;
 
int main()
{
    //Initiliazing an Integer Empty Array
    int emptyArray[10] = {0};

    cout<<emptyArray[0]<<" "<<emptyArray[1];

    return 0;
}

Output:

0 0

As you can see in the code above, I was able to assign values to all of the elements in the empty array starting with zero. To ensure that you have correctly assigned the values, try printing the empty array that was declared, as the output was zero for all of the elements.

Wrap Up

I hope you received your answer about how to declare an empty array in C++. I’ve suggested two approaches for declaring or initializing an empty array.

One method involves not assigning any fixed values to the array’s elements, while another involves assigning fixed values to array elements while they are declared or initialized.

Please let me know in the comments section below if you come across any better ideas than the ones discussed above, and I will gladly share them here.

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2. How To Find The Sum Of An Array Of Numbers in JavaScript
3. Easiest and Best Way To Convert Int to String in C++
4. How To Convert a Char to String in C++ Quickly
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