GCC does not compile

Question

I have a MAC OS Mojave machine and gcc does not work on it. When i run the following code it does nothing and goes to new terminal line

 #import <iostream>;
  using namespace std;
  int main() {
     cout << "Hello World!!";
     return 0;
  }

PLS HELP!! I even tried using code from w3Schools

I use in bult mac terminal and no it does not give a error message; @MartinMorterol — UrTech Tips, Apr 03 '21 at 17:35
Also don't put the `;` after `#import ` (also I never see `#import` used ever and I think it's not as portable as `#include` and deprecated, so use `#include`) — mediocrevegetable1, Apr 03 '21 at 17:37
@UrTechTips It's hard to believe that you don't receive any error messages like here: http://coliru.stacked-crooked.com/a/5bffc02c5f9db0f6 — πάντα ῥεῖ, Apr 03 '21 at 17:37
But even after getting the code from w3schools it doesnot work it just does nothing no errors even. — UrTech Tips, Apr 03 '21 at 17:38
Please cut-and-paste the **exact** output from your terminal when you compile and run the code. — dbush, Apr 03 '21 at 17:40
Also, do you do `./file-name` after compiling? The compiler won't run the code for you too. — mediocrevegetable1, Apr 03 '21 at 17:41
It is not the problem, but are you sure your compiler is GCC? Xcode and Apple development command line tools install *Clang* and not *GCC* on macOS. There is a symlink of `gcc` to `clang` which may you think you invoke GCC while you are in fact calling Clang. — prapin, Apr 03 '21 at 18:09
Please read [this C++ reference](https://en.cppreference.com/w/cpp) — Basile Starynkevitch, Apr 03 '21 at 18:09

score 2 · Accepted Answer · answered Apr 03 '21 at 17:40

Two things:

Your code had some errors. #import is deprecated, use #include instead. You don't need a semicolon after #include statements. Also, you need to use << to give "Hello World!!" to cout, not >>. If you don't use using namespace std;, you need to specify the namespace for cout. In this case, it would be std::cout.

Here's your corrected code:

#include <iostream>

int main() {
   std::cout << "Hello World!!";
   return 0;
}

gcc (or g++, since you're working with C++) doesn't run code after you compile it. If you're just running something like g++ main.cpp, g++ will generate a file called a.out. This is your compiled binary. To run it in the terminal, type ./a.out in your terminal and press enter.

1 Answers1