Are large files like iostream efficient? (C ++)

Question

Iostream when all the files that it includes, the files that they include, etc. etc., combine about 3,000 lines.

Consider the hello world program, which does not require more functionality than typing something on the screen:

#include <iostream> //+3000 lines right there.
int main()
{
    std::cout << "Hello, World!";
    return 0;
}

it should be a very simple piece of code, but iostream adds 3000+ lines to the marginal piece of code. So, these 3,000+ lines of code are really necessary to just display one line on the screen, and if not, do they create a less efficient program than if I just copied the corresponding lines into the code?

Answer 1

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Answer 2

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Answer 3

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Answer 4

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