Given nums = [2, 7, 11, 15], target = 9,
Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].

int* twoSum(int* nums, int numsSize, int target)
{
    static int a[2]={0.0};

    for (a[0] = 0; a[0] <numsSize; a[0]++)
    {
        for (a[1] = a[0]+1; a[1] <numsSize; a[1]++)
        {
            if(nums[a[0]]+nums[a[1]]==target)
            {
                
                return a;
            }
        }
    }
    return 0;
}