Solidity 中的嵌套映射

此程式碼需要兩個輸入（_Id，_name）來獲取年齡我只需要從輸入 id 中獲取姓名和年齡

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;
contract nestmap
{
   mapping(uint256=>mapping(string=>uint256)) public User;
   function adduser(uint256 _Id,string memory _name, uint256 _age)public {
        User[_Id][_name]=_age;
   }
   
}
function user(uint256 _Id,string memory _name)public view returns(uint256)
   {
       return User[_Id][_name];
   }

你可以試試這個：

pragma solidity 0.8.7;

contract nestmap {

   struct Person{
       uint256 age;
       string name;
   }

   mapping (uint256 => Person) public User;

   function adduser(uint256 _Id, uint256 _age, string memory _name) public {
        User[_Id].age = _age;
        User[_Id].name = _name;
   }

   function user(uint256 _Id) public view returns(Person memory) {
       return User[_Id];
   }
}

引用自：https://ethereum.stackexchange.com/questions/137805