MATLAB: MexPrintf message doesn’t show on matlab command window

mex

Hi everyone,
I started working with mex on matlab to build a c code and I wrote a very simple code (main.c) to begin with :
#include "stdio.h"
#include "stdlib.h"
#include "mex.h"
void main()
{   
    mexPrintf("Hello world");
}
when I type mex main.c in a matlab script everything goes well and I have this message:
"Building with 'gcc'.
MEX completed successfully."
but I don't see the message "Hello world", I tried printf() too without success, does anyone know why the message doesn't appear on the matlab window please ?
Thanks in advance for your help.
-J

Best Answer

How do you call this code from where? Without a mexFunction() it cannot be called from Matlab, because this is the entry function (and not "main()"). If you call it from somewhere else, the code has no connection to Matlab's command window. printf() works in a console application, but it is not clear, how you have compiled the code: "mex main.c" would require a mexFunction to work, but you should see a corresponding error message.
Working:
// main.c
#include "mex.h"  
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
  mexPrintf("Hello world!\n");
}
Now compile it by "mex main.c" and run it by typing main in the command window.
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