A program that says something

Here's the short version. C++ is C with more furniture. You still write a function called main. The operating system calls it. You return 0 if the night went well.

At the top, you include a header. iostream is the one that talks to the screen. std::cout is the stream. << feeds it. std::endl ends the line. Some people write '\n'. Both are fine at this desk.

#include <iostream>

int main() {
    std::cout << "hello" << std::endl;
    return 0;
}

You will not compile this in the browser. You match the source. On your machine, that's g++ hello.cpp -o hello, then ./hello. We'll get there in lesson 10.

Semicolons end statements. Forget one and the compiler writes you a novel. Read the first error. Fix that. Then the next.