C2143 缺少 ';'在“*”和 C 4430 之前缺少类型说明符 - 假定为 int。注意 c++ 不支持 default-int

C2143 missing ';' before '*' & C 4430 missing type specifier - int assumed. note c++ does not support default-int

此代码采用多个输入文件,然后使用 getline 函数将输入文件中的行放入链表中。我想创建链接列表存在问题,因为它给出了错误 "error C2039: 'down' : is not a member of 'Functions " 以及标题上的指定错误。我不知道 C2130 和 C4430 错误。

#include <iostream>
#include <fstream>
#include <string>
#include "strutils.h" 
using namespace std;

struct Functions
{
    string fname;
    Functions *right;
    Commands  *down;
};
struct Commands
{
    string command;
    Commands *next;
};

Functions *head = nullptr;
Functions *temp = nullptr;

void printLinkedList()
{
    Functions *ptr = head;
    while (ptr != nullptr)
    {
        cout << ptr->fname << endl;
        while (ptr->down != nullptr)
        {
            cout << ptr->down->command + " ";
            ptr->down = ptr->down->next;
        }
        cout << endl;
        ptr = ptr->right;
    }   
}

您需要转发声明 Commands 结构:

struct Commands;

struct Functions
{
    string fname;
    Functions *right;
    Commands  *down;
};
struct Commands
{
    string command;
    Commands *next;
};

Functions之前添加Commands的前向声明:

struct Commands;
struct Functions {
   ...
}