int add(int count, ...)
{
    // 指针大小与程序位数有关(32位指针是4个字节,64位指针是8个字节)
    int intSize = sizeof(int*) / sizeof(int);         
    int sum = 0;
    // cout << &count << endl;
    int *p = &count + intSize;
    // cout << p << endl;
    for (int i = 0; i < count; ++i)
    {
        sum += *p;
        cout << *p << endl;
        p += intSize;
    }
    return sum;
}

int main()
{
    cout << add(3, 1, 2, 3) << endl;

    return 0;
}

输出:

1
2
3
6