固体中的未声明标识符

Question

我刚开始学习稳健，我试着签一个合同，你可以把名字添加到圣诞老人的淘气或美好的名单中，我想要输入一个名字，我希望输出是在淘气的还是好的名单上，还是不存在。在这里，我试图查看输入的名称是否在“淘气”列表中，它给了我错误消息:未声明的标识符。我在最后一个函数中突出显示的位置出现了这个错误，谢谢任何帮助我的人。

pragma solidity ^0.8.11;

contract SantaList {

    struct NaughtyList{
        string badBoy;
        uint position;
    }
    struct NiceList{
        string goodBoy;
        uint position;
    }

    NaughtyList[] public badNames;
    NiceList[] public goodNames;

    uint internal nextPosition = 1;

    function AddToBadList(string memory badBoy) public{
        badNames.push(NaughtyList(badBoy, nextPosition));
        nextPosition++;
    }

    function AddToNiceList(string memory goodBoy) public{
        goodNames.push(NiceList(goodBoy, nextPosition));
        nextPosition++;
    }

    function GetNaughtyList() view public returns(NaughtyList[] memory){
        return badNames;
    }

    function GetNiceList() view public returns(NiceList[] memory){
        return goodNames;
    }

    function CheckList(string memory name) public {
        for(uint i = 0; i < badNames.length; i++){
            if(badNames[i].badBoy == **badBoy**){
                return **badBoy**;
                return " is on the naughty list";
            }
        }
    }
    
}

Answer 1

如果要检查badNames中是否有名称

function CheckList(string memory name) public view returns (string memory) {
    for(uint i = 0; i < badNames.length; i++){
        if(badNames[i].badBoy == name){
            return string(abi.encodePacked(name, " is on the naughty list"));
        }
    }
    return string(abi.encodePacked(name, " is not on the naughty list"));
}