If the inputs are : -1 -2 -3 -4 -5, then why is it giving wrong answer?

#1

#include
using namespace std;

int main()
{
int n;
cout << "Enter array size " <<endl;

cin >> n;
int a[7];
int precomputing[7];
int curr_sum = 0;

int max_sum = 0;

int left = -1;
int right = -1;

cout << "enter array element " <<endl;

cin >> a[0];

precomputing[0] = a[0];

for(int i = 1; i< n; i++)
{
	cin >> a[i];

	precomputing[i] = precomputing[i-1] + a[i];
}

for(int i=0; i<n; i++){
	for(int j=i; j<n; j++){

		int curr_sum = precomputing[j] - precomputing[i-1];

			if(curr_sum > max_sum){
								
				max_sum = curr_sum;

				left = i;
				right = j;

			}

	}

	
}


cout << endl << "Maximum Subarray is " << max_sum ;

cout << endl << "And Subarray is " << endl;

for (int i = left; i <= right; ++i)
{
	cout << a[i] << ", " ;
}
return 0;

}