function?carbody（x）
global?bodyhandle?stickhandle
body.l=15;
body.w=6;
A.x=-body.l/2+x;
A.y=-body.w/2-body.w/2;
B.x=body.l/2+x;
B.y=-body.w/2-body.w/2;
C.x=body.l/2+x;
C.y=body.w/2-body.w/2;
D.x=-body.l/2+x;
D.y=body.w/2-body.w/2;
bodyhandle（1）=line（[A.xB.x][A.yB.y]‘color‘‘k‘）;
bodyhandle（2）=line（[A.xD.x][A.yD.y]‘color‘‘k‘）;
bodyhandle（3）=line（[C.xB.x][C.yB.y]‘color‘‘k‘）;
bodyhandle（4）=line（[C.xD.x][C.yD.y]‘color‘‘k‘）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1797??2019-08-13?18:16??daolibai.asv
?????文件????????1788??2019-08-13?18:22??daolibai.m
?????文件?????????427??2019-08-12?16:47??lqrdemo.m
?????文件?????????207??2019-08-13?10:34??stick.m
?????文件?????????459??2019-08-13?11:54??carbody.m