Thread: Struggle in changing the code

Good morning,

How to change the following code

Code:

#include<stdio.h>
int main()
{
   int a[100], n, i, psum=0, nsum=0;

   printf("Size od the table [1-100]: ");
   scanf("%d",&n);
   printf("Write %d elements: ",n);

   for(i=0; i<n; i++)
   {
     scanf("%d",&a[i]);
     if(a[i]<0) nsum += a[i];
     else psum += a[i];
   }

   printf("Sum of positive numbers: %d",psum);
   printf("\nSum of negative sumbers: %d",nsum);
   return 0;
}

so I don't need to write the size of the board and I can just write and write elements until I write 0, so then it fnishes?
And how I can print all positive elements and all negative elements??

For printing the negatives of the array just run the array again and check if the number is negative.