compilers/cw/tests/deep_closure.c

/* ##answer: 18 */
function cplus(int a) {
  int cplusa(int b) {
    int cplusab(int c) {
      return a + b + c;
    }
    return cplusab;
  }
  return cplusa;
}

int main() {
  return cplus(5)(6)(7);
}