l0009.hys

由matlab开发的hybrid系统的描述语言

SYSTEM outflow {
   INTERFACE {
      OUTPUT {
         REAL y1,y2,y3;}
      INPUT {
         REAL x1,x2,x3; }
   } /* end of interface */
   IMPLEMENTATION {
      OUTPUT {
         y1 = x1 + 2 * x2 + 3 * x3 + 4 * x1; 
              /* OK! = 5 * x1 + 2 * x2 + 3 * x3 */
         y2 = x1 + log(2) * x2 - log(2) * x2; 
              /* OK! = x1 */
         y3 = x1 + x2 * x3 - x3 * x2; 
              /* ERROR! although linear, HYSDEL will*/
              /* report an error */}
   } /* end implementation */
} /* end system */