z

    A structure of type cabs_t, cabsf_t, or cabsl_t. These types are
    defined in the <math.h> header file as follows:

    typedef struct {double x,y;} cabs_t;

    typedef struct { float x, y; } cabsf_t; (Integrity servers, Alpha)
    typedef struct { long double x, y; } cabsl_t; (Integrity servers, Alpha)