Returning status of operation using mex

After i call to the mex function i written to do fopen, fred and fclose, how do i return the status to my mat file to check whether the file has been read or opened?

Answer 1

[Chirag Gupta]

mex functions can return outputs:

void mexFunction(int nlhs, mxArray *plhs[], int nrhs,
const mxArray *prhs[]);

The nlhs : number of left hand arguments and plhs are the arguments you wish to return.

So you could return the status of the MAT file in plhs. You would call this function in MATLAB:

status = NameOfYourMexFunction(inputs);