(c++) what is the difference between passing an array to a function then finding its length and directly finding its length?

Question

Each is giving a different output..
How to fix this problem?
https://code.sololearn.com/c7EmmsCBKYL3/?ref=app

Answer 1

Abhishek Mazumder It's because arrays are treated as pointers in C whereas they actually are not. So when you pass array as an argument where the parameter is a pointer, what you do is sizeof( int * ) / sizeof ( int ) which makes the answer same no matter what the size of the actual array is. In my system it outputs 2 all the time as a pointer to an integer is 8 bytes and an integer is 4 bytes.

Answer 2

but each is giving a different output

Answer 3

ok got it Thanks

Answer 4

but come we find the size of an array inside a function

Answer 5

Mustafa K. Thank You very much I found it..