填充結構會引發錯誤

嗨，我正在嘗試在混音中執行此程式碼。它部署成功，但是每當我使用 addCustomer 函式添加客戶時，它都會顯示此消息“交易到 MyContract.addCustomer 掛起 … ”。之後，如果我嘗試與任何其他功能互動，它只會列印例如“呼叫 MyContract.totalRooms ”，然後瀏覽器視窗掛起。我可以知道是什麼問題。

pragma solidity ^0.6.0;

contract MyContract {

   enum Statuses {Vacant,Occupied}
   uint internal counter = 0;
   event occupied (string cname, address raddr);
   uint public constant totalRooms = 5;
   struct Room{
       address roomAddress;
       Statuses roomStatus;
   }

   mapping(uint => Room) public rooms;

   function roomInfo() public {
       rooms[1] = Room(0x33c5E8069F3F5b653fEDdE8c628B1e0DE48382a1,Statuses.Vacant);
       rooms[2] = Room(0x88789bB3d6B1eF931d3DF5aB008A38F86EA3da8d,Statuses.Vacant);
       rooms[3] = Room(0xDaEf09dE138de7C27f1a43cA6c544c1a6A50BAf9,Statuses.Vacant);
       rooms[4] = Room(0xC72C577e4450E4AAF9eaf2FF3ff6b3eC597F894b,Statuses.Vacant);
       rooms[5] = Room(0xF68af2bAC4c9Db4a27186C6382eAD0c0BA04638F,Statuses.Vacant);
   }


   // Mappings
   mapping(uint => Customer) public customers;


   struct Customer {
       address _address;
       string name;
       address room;
   }


   constructor() public {

   }


   function addCustomer(address _add, string memory _name) public {
       address _room;
       while(counter<=totalRooms){
           for(uint i =0; i< totalRooms;i++){
               if(rooms[i].roomStatus==Statuses.Vacant)
                 _room = rooms[i].roomAddress;
               else 
               i++;
           }
           customers[counter+1] = Customer(_add, _name,_room);
       }

       emit occupied(_name,_room);
   }


}

該addCustomer函式有一個無限循環

while 循環counter內部永遠不會被修改

   while(counter<=totalRooms){
       for(uint i =0; i< totalRooms;i++){
           if(rooms[i].roomStatus==Statuses.Vacant)
             _room = rooms[i].roomAddress;
           else 
           i++;
       }
       customers[counter+1] = Customer(_add, _name,_room);
   }

似乎應該在那裡使用 if

   if (counter < totalRooms) {
       for (uint i = 0; i< totalRooms; i++){
           if (rooms[i].roomStatus == Statuses.Vacant) {
               _room = rooms[i].roomAddress;
               break;
           }
       }
       counter += 1;
       customers[counter] = Customer(_add, _name,_room);
   }

引用自：https://ethereum.stackexchange.com/questions/83884