#include<stdlib.h>
#include<stdio.h>
#include<time.h>
//#include<conio.h>
#define A -20
#define B 20
int main()
{
double *a, sum;
int i, n, size;
srand(time(NULL));
//scanf("%d", &size);
size = 10;
a = (double *)malloc(size*sizeof(*a));
for (sum = i = 0; i < size; i++)
{
a[i] = (1.0*(rand()%(B-A+1)) + A) / (1.0*(B - A));
printf("%.2f ", a[i]);
if (a[i] > 0)
sum += a[i];
}
printf("\n sum = %.2f\n", sum);
getchar();
return 0;
}