About cout

Question

Cout<< 1+"hello";
Why the output is "ello"?
Cout<<2+ "hello";
Why the output is "llo"?
Why do we see only the pieces of the word "hello"?
What does cout return with numbers?

Answer 1

Strings are arrays of characters. And arrays are implemented with pointers. Which means that what you do here is add 1 or 2 to the address of the array, and since sizeof(char) is 1, you will skip as many characters.

Answer 2

Additionally, this approach will not work if you use it directly on a std::string object, because it is more than a simple char array. However, the same effect is possible through the use of the `c_str` or `data` member of the std::string object, which exposes the internal buffer content.

Answer 3

~ swim ~ That's right 👍
But we can't do that on the string object, only with the .c_str or .data which exposes the internal buffer : )

Answer 4

Though I could've been more clear if I said "this will not work if you use a std::string object directly, ..."
I will make adjustment on my first post, Thanks ~ swim ~ for the note 😁

Answer 5

If you added the 1+ at the beginning or end of the string (ex. cout << 1+"hello"), it returns "ello" because the 1+ removes a letter from the beginning of the string. The second experiment you made has removed 2 letters from the beginning of the string.
So, the output will be a whole string, but a number of characters at the beginning of the string will be removed.

Answer 6

What is string object

Answer 7

Привет

Answer 8

Есть русский

Answer 9

I think you need to write " in front of 1, i try it and works

Answer 10

Hello

Answer 11

Разобрался?

Answer 12

Right answer:
cout<<1<<"hello";

Answer 13

Hello

Answer 14

По

Answer 15

Hlo sir

Answer 16

Hey how to learn programming may i ask anyone who can me

Answer 17

Helo . How to make game and launch on playstore

Answer 18

cout <<"my name is mohamed Mostafa I need learn C++" ;

Answer 19

I love C++ programeble

Answer 20

Gay