C++ for 循环

C++的另一种for循环写法，和C#的foreach语法很类似，不需要知道数组的类型；

C++：for（auto& item:items)

C#:foreach(var item in items)

    int ages [10] = {0};
    //常规for循环
    for(int i=0;i<(sizeof(ages)/sizeof(ages[0]));i++)
    {        
        ages[i]=i;
        cout<<ages[i]<<endl;
    }
    //for(auto 赋值操作
    for(auto& age :ages)
    {
        age+=10; 
    }
    cout<<"----------"<<endl;    
    //for(auto 遍历
    for(auto age :ages)
    {
        cout<<age<<endl;
    }