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