#include "iostream"

 const int MAX{};//c++11中使用{}进行重新命名

 int main()

 {

     using namespace std;

     double fish[MAX];

     //////////

     bool sym;

     int test;

     sym = bool(cin >> test);

     cout << sym << endl;//这里是用来测试cin输入如果输入的不是对应的类型，那么将返回什么.

     /////////

     cout << "please enter the weights of dish.\n";

     cout << "you may enter up to" << MAX << " fish<q to terminate>.\n";

     cout << "fish #1: ";

     int i{};

     while (i < MAX && cin >> fish[i]){//注意两点：数组是从[0]元素开始的！！这里输入了double型数据判定为true。

         if (++i < MAX)                 //输入了其他的字母判定为false。因此若输入了字母则会结束

             cout << i << endl;

             cout << "fish #" << i +  << ":";

     }

         double total{ 0.0 };

         for (int j{  }; j < i; j++)

             total = total + fish[j];

         if (i == )

             cout << "No fish\n";

         else

             cout << total / i << "=ave weight of " << i << "fish\n";

         cout << "Done.\n";

         system("pause");

         return ;

 }