User`s manual

3 Creating Fortran MEX-Files

3-12

To compile and link this example source file, at the MATLAB prompt type

mex timestwo.f

This carries out the necessary steps to create the MEX-file called timestwo

with an extension corresponding to the machine type on which you’re running.

You can now call

timestwo as if it were an M-function.

x = 2;

y = timestwo(x)

y =

Passing Strings

Passing strings from MATLAB to a Fortran MEX-file is straightforward. This

program accepts a string and returns the characters in reverse order.

C $Revision: 1.14 $

C==============================================================

C revord.f

C Example for illustrating how to copy string data from

C MATLAB to a Fortran-style string and back again.

C Takes a string and returns a string in reverse order.

C This is a MEX-file for MATLAB.

C==============================================================

subroutine revord(input_buf, strlen, output_buf)

character input_buf(*), output_buf(*)

integer i, strlen

do 10 i=1,strlen

output_buf(i) = input_buf(strlen-i+1)

10 continue

return

end