c++的两种循环遍历

int a[5] = { 1,2,3,4,5 };

#迭代
for (int i : a)
    {
        cout << i << endl;
    }

#普通for循环    
for (int i = 0; i < sizeof(a) / sizeof(a[0]); i++)
{
    cout << a[i] << endl;
}