random C thing

random.c

//以下は、c でも c++ でも同じ。
//X(x) になってるところは全て警告orエラーになる。
// http://d.hatena.ne.jp/cicupo2/

void foo(void*x){}

#define C const
#define X(x) /* x */

int main()
{
  int   *   *    p000;
  int   *   * C  p001;
  int   * C *    p010;
  int   * C * C  p011;
  int C *   *    p100;
  int C *   * C  p101;
  int C * C *    p110;
  int C * C * C  p111;

    foo(p000[0]);     foo(p000);     foo(&p000);
    foo(p001[0]);     foo(p001);   X(foo(&p001));
    foo(p010[0]);   X(foo(p010));    foo(&p010);
    foo(p011[0]);   X(foo(p011));  X(foo(&p011));
  X(foo(p100[0]));    foo(p100);     foo(&p100);
  X(foo(p101[0]));    foo(p101);   X(foo(&p101));
  X(foo(p110[0]));  X(foo(p110));    foo(&p110);
  X(foo(p111[0]));  X(foo(p111));  X(foo(&p111));

  return 0;
}