org-mode/testing/examples/ob-C-test.org

#+Title: a collection of examples for ob-C tests
#+OPTIONS: ^:nil
* Simple tests
  :PROPERTIES:
  :ID:       fa6db330-e960-4ea2-ac67-94bb845b8577
  :END:
#+source: simple
#+begin_src cpp :includes "<iostream>" :results silent
  std::cout << 42;
  return 0;
#+end_src

#+source: integer_var
#+begin_src cpp :var q=12 :includes "<iostream>" :results silent
  std::cout << q;
  return 0;
#+end_src

#+source: two_var
#+begin_src cpp :var q=12 :var p=10 :includes "<iostream>" :results silent
  std::cout << p+q;
  return 0;
#+end_src

#+source: string_var
#+begin_src cpp :var q="word" :includes '(<iostream> <cstring>) :results silent
  std::cout << q << ' ' << std::strlen(q);
  return 0;
#+end_src

#+source: define
#+begin_src cpp :defines N 42  :includes "<iostream>" :results silent
  std::cout << N;
  return 0;
#+end_src

* Array
  :PROPERTIES:
  :ID:       2df1ab83-3fa3-462a-a1f3-3aef6044a874
  :END:
#+source: array
#+begin_src cpp :includes "<iostream>" :results vector :results silent
  for (int i=1; i<3; i++) {
    std::cout << i << '\n';
  }
  return 0;
#+end_src
* Matrix
  :PROPERTIES:
  :ID:       cc65d6b3-8e8e-4f9c-94cd-f5a00cdeceb5
  :END:
#+name: C-matrix
| 1 | 2 |
| 3 | 4 |

#+source: list_var
#+begin_src cpp :var a='("abc" "def") :includes "<iostream>" :results silent
  std::cout << a[0] << a[1] << sizeof(a)/sizeof(*a) << '\n';
#+end_src

#+source: vector_var
#+begin_src cpp :var a='[1 2] :includes "<iostream>" :results silent
  std::cout << a[0] << a[1] << sizeof(a)/sizeof(*a) << '\n';
#+end_src

#+source: list_list_var
#+begin_src cpp :var q=C-matrix :includes "<iostream>" :results silent
  std::cout << q[0][0] << ' ' << q[1][0] << '\n'
            << q[0][1] << ' ' << q[1][1] << '\n'; // transpose
#+end_src