Sum of positive numbers

Write a program to find the sum of positive numbers in an array.

Input Format: 
Input consists of n+1 integers. The first integer corresponds to ‘n’ , the size of the array. The next ‘n’ integers correspond to the elements in the array. Assume that the maximum value of n is 15.

Output Format: 
Refer sample output for details.
Sample Input :
5
2
3
6
8
-1
Sample Output : 
The sum of the positive numbers in the array is 19

Code:

  #include<stdio.h>
int main(){
  int n,a[20],i,sum=0;
  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&a[i]);
    if(a[i]>0)
      sum=sum+a[i];
  }
  printf("The sum of the positive numbers in the array is %d",sum);
  return 0;
}