1  #include <complex.h>
       2  
       3  struct st
       4  {
       5    int s1;
       6    float complex x;
       7  };
       8  
       9  typedef struct { float r, i; } _complex;
      10  
      11  struct stc
      12  {
      13    int s1;
      14    _complex x;
      15  };