【c++】不用if获取数组最大值

/// <summary>
/// 获取数组最大值
/// </summary>
/// <param name="arr">数组</param>
/// <param name="count">数组大小</param>
/// <returns>最大值</returns>
int max(int arr[], int count)
{
    if (!count) return 0;
    int max = arr[0];
    for (int i = 1; i < count; ++i)
        max = ((max + arr[i]) + abs(max - arr[i])) / 2;
    return max;
}

int main()
{
    int iArr[] = { 10,12,11,15,18,50,1 };
    cout << max(iArr, sizeof(iArr) / sizeof(int)) << endl;
    system("pause");
    return 0;
}