%exm12222_1.m

!md d:\mywork
ss=char(which('my_yprime.c','-all'));
dos(['copy ',ss ,' d:\mywork']);
cd d:\mywork					%把用戶目錄指定為當前目錄

mex my_yprime.c				%由my_yprime.c文件生成my_yprime.dll文件

my_yprime(1,1:4)				%運行my_yprime.dll文件
which my_yprime				%獲得my_yprime.dll文件的位置信息  

!del my_yprime.c