C (/ˈsiː/, as in the letter c) is a general-purpose, imperative computer programming language. It supports structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, and therefore it has found lasting use in applications that had formerly been coded in assembly language, including operating systems, as well as various application software for computers ranging from supercomputers to embedded systems.

long some_function();
/* int */ other_function();

/* int */ calling_function()
  long test1;
  register /* int */ test2;

  test1 = some_function();
  if (test1 > 0)
        test2 = 0;
        test2 = other_function();
  return test2;

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