Question

Write 4 different Unit Tests for this c++ method using assert functions with visual studio.

/*

returns sum of the subarray strating from index start
a is the array,
n is size of the array
start in the starting index of the subarray
*/

int subArraySum(int a[], int n, int start)
{
   int sum = 0;
   for (int i = start; i < n; i++)
       sum += a[i];

   return sum;

}

Answer 1

#include <iostream>
#include <cassert>

using namespace std;

int subArraySum(int a[], int n, int start)
{
   int sum = 0, i;
   for (i = start; i < n; i++)
       sum += a[i];

   return sum;

}

int main()
{
   int arr[] = {4,3,2,5,1,6,8,7,10,9};
    assert(subArraySum(arr,10,0) == 55);
    assert(subArraySum(arr,10,1) == 51);
    assert(subArraySum(arr,10,11) == 0);
    assert(subArraySum(arr,10,9) == 9);
    
    return 0;
}