do cout's after you set variables to ensure that they are getting stored properly. Double check that your loop control variable is what you want it to be and not just a random int.

Also, fix your declarations - at best its poor programming style to declare variables and only initialize some of them in the same line.

i.e.
int num, min, max, n;
double mean, sum = 0, count;

---
double mean, sum, count;
sum = 0;

Also, whats the purpose of this?
for (count = 0; count < 1; count++)
{
min = 0;
max = 0;
}

Its only going to run once.. why not just set the variables?