Re: Want to know how to inluce octave fft lib in my Qt program

[Prasanth N P]

On Thu, Oct 24, 2013 at 3:04 PM, c. <address@hidden> wrote:

On 24 Oct 2013, at 11:05, Prasanth N P <address@hidden> wrote:
>
>   for (ucI=0; ucI< 1024; ucI++)
>     fscanf(fp, "%d\n", input_vector.fortran_vec () + ucI);
>

>   for (ucI=0; ucI< 1024; ucI++)
>       printf("%d\n",output_vector.fortran_vec () [ucI]);

This is not related to Octave API, you are reading and writing doubles formatting
them as integers with "%d":

http://www.cplusplus.com/reference/cstdio/printf/

BTW, why are you using C-style IO rather than C++?

http://www.cplusplus.com/reference/istream/istream/operator%3E%3E/
http://www.cplusplus.com/reference/ostream/ostream/operator%3C%3C/

That is a matter of taste, but I find that iostream is usually much more convenient ...

c.

Yes ofcourse I know that, but when I use iostream, it is found as some strange or unknown format of result set. I need the output as float or double. 

  for (ucI=0; ucI< 1024; ucI++)

     std::cout << ucI << "----" << output_vector.fortran_vec () [ucI] << "\n";

will produce result set as 

1.52985e-311

1.8092e-313

1.67617e-312

9.48677e-314

2.29452e-312

5.91922e-313

1.91471e-312

2.78877e-313

1.1621e-313

1.03975e-313

2.01928e-313

3.21101e-313

5.9721e-313

1.07526e-313

2.20929e-313

4.43025e-313

etc...