please use code tags!!!!
[code] the code that NEEDS TO BE IN BETWEEN THE TAGS [/code]
this is what it is supposed to do it you were to post all of it
printf("mean = %f \n", calc_mean(number_array));
printf("std dev = %f \n", calc_std_dev(number_array));
and without knowing what that unknown error is
there is no way to help
PLEASE READ the guide on posting
and included the NEEDED information
the operating system you are using ?
the version of said OS ?
the FULL build line you are using
and the MOST important part
THE ERROR !!!!!