Structure P192 int area (struct rect *rp) return (*rp).width (*rp). height ⅴ。 id rotate1eft( struct rect*rp) /* Exchange width and height * int t rp-heighti rp->height rp->width rp->width s ti6 Structure P192 int area (struct rect *rp) { return (*rp).width * (*rp).height; } void rotate_left (struct rect *rp) { /* Exchange width and height */ int t = rp->height; rp->height = rp->width; rp->width = t; }