What is the relation between the gets() function and a character array's size?

Question

Code:

#include <iostream>
#include <stdio.h>
using namespace std;

char ch[5];

int main()
{
cout << "Size of character array before input: " << sizeof(ch) <<
endl;

gets (ch);

puts (ch);

cout << "Size of character array after input: " << sizeof(ch);

return 0;
}

And the output came to be:

Size of character array before input: 5
ABC DE FGHIJKL //Input
ABC DE FGHIJKL //Output
Size of character array after input: 5

How can the whole input be displayed with no change in size?

Answer 1

beacause when you put char c[5] you already allocate memory for 5 characters no matter did you put something in that positions in array

Answer 2

Isn't the size of 1 character supposed to be 1 byte? Hence, sizeof(ch) outputting 5 before any input.
So, how is 5 bytes of storage able to hold more than 5 characters?

Answer 3

So then, somehow, 5 bytes CAN store more data than merely 5 characters? That is what we conclude, right?