Question

Hi I am new to C programming can anyone please tell me what this line of code would do:

i = (sizeof (X) / sizeof (int))

The code actually works with a case statement when it takes a value of bdata and compares it to different cases.

Answer 1

Generally, such a statement is used to calculate the number of elements in an array.

Let’s consider an integer array as below:

int a[4];

Now, when sizeof(a) is done it will return 4*4 = 16 as the size. 4 elements and each element is of 4 bytes.

So, when you do sizeof(a) / sizeof(int), you will get 4 which is the length or size of the array.