请用C++实现一个链表，把rating.json文件数据读入到链表中,文件里的每条记录包含如下字段信息comment（int）, from,comments,to,score,corp, time，样例记录为{ "comment": 0, "from": "北京-北京市-海淀区", "comments": [], "to": "河北省-承德市-隆化县", "score": "0", "corp": "兴铁物流", "time": "1398175318.988036" }

好的，以下是用C++实现链表，并将rating.json文件数据读入链表中的代码：

#include <iostream>
#include <fstream>
#include <string>
#include <vector>

using namespace std;

struct Record {
    int comment;
    string from;
    vector<string> comments;
    string to;
    string score;
    string corp;
    string time;
    Record* next;
};

Record* createNode(int comment, string from, vector<string> comments, string to, string score, string corp, string time) {
    Record* node = new Record;
    node->comment = comment;
    node->from = from;
    node->comments = comments;
    node->to = to;
    node->score = score;
    node->corp = corp;
    node->time = time;
    node->next = NULL;
    return node;
}

void insertNode(Record*& head, int comment, string from, vector<string> comments, string to, string score, string corp, string time) {
    Record* node = createNode(comment, from, comments, to, score, corp, time);
    if (head == NULL) {
        head = node;
    }
    else {
        Record* temp = head;
        while (temp->next != NULL) {
            temp = temp->next;
        }
        temp->next = node;
    }
}

void printList(Record* head) {
    Record* temp = head;
    while (temp != NULL) {
        cout << "comment: " << temp->comment << endl;
        cout << "from: " << temp->from << endl;
        cout << "comments: ";
        for (string comment : temp->comments) {
            cout << comment << " ";
        }
        cout << endl;
        cout << "to: " << temp->to << endl;
        cout << "score: " << temp->score << endl;
        cout << "corp: " << temp->corp << endl;
        cout << "time: " << temp->time << endl;
        cout << endl;
        temp = temp->next;
    }
}

int main() {
    Record* head = NULL;
    ifstream fin("rating.json");
    if (fin.is_open()) {
        string line;
        while (getline(fin, line)) {
            int comment;
            string from, to, score, corp, time;
            vector<string> comments;
            size_t pos = 0;
            while (pos < line.size()) {
                if (line[pos] == '{' || line[pos] == ' ' || line[pos] == ',' || line[pos] == ':') {
                    pos++;
                }
                else if (line[pos] == '}') {
                    break;
                }
                else {
                    size_t end_pos = line.find('"', pos + 1);
                    string field_name = line.substr(pos, end_pos - pos);
                    pos = end_pos + 2;
                    if (field_name == "comment") {
                        end_pos = line.find(',', pos);
                        comment = stoi(line.substr(pos, end_pos - pos));
                        pos = end_pos + 1;
                    }
                    else if (field_name == "from") {
                        end_pos = line.find('"', pos);
                        from = line.substr(pos, end_pos - pos);
                        pos = end_pos + 2;
                    }
                    else if (field_name == "comments") {
                        end_pos = line.find(']', pos);
                        string comment_str = line.substr(pos, end_pos - pos);
                        pos = end_pos + 1;
                        size_t comment_pos = 0;
                        while (comment_pos < comment_str.size()) {
                            end_pos = comment_str.find('"', comment_pos + 1);
                            string comment = comment_str.substr(comment_pos + 1, end_pos - comment_pos - 1);
                            comments.push_back(comment);
                            comment_pos = end_pos + 2;
                        }
                    }
                    else if (field_name == "to") {
                        end_pos = line.find('"', pos);
                        to = line.substr(pos, end_pos - pos);
                        pos = end_pos + 2;
                    }
                    else if (field_name == "score") {
                        end_pos = line.find('"', pos);
                        score = line.substr(pos, end_pos - pos);
                        pos = end_pos + 2;
                    }
                    else if (field_name == "corp") {
                        end_pos = line.find('"', pos);
                        corp = line.substr(pos, end_pos - pos);
                        pos = end_pos + 2;
                    }
                    else if (field_name == "time") {
                        end_pos = line.find('"', pos);
                        time = line.substr(pos, end_pos - pos);
                        pos = end_pos + 2;
                    }
                }
            }
            insertNode(head, comment, from, comments, to, score, corp, time);
        }
        fin.close();
    }
    else {
        cout << "Cannot open file" << endl;
    }
    printList(head);
    return 0;
}

以上代码中，我们定义了一个名为Record的结构体，用来存储每条记录的各个字段信息。通过createNode函数创建一个Record节点，insertNode函数将该节点插入到链表中。printList函数用来遍历整个链表并打印每个节点的信息。

在main函数中，我们首先将链表头指针head初始化为NULL。然后使用ifstream打开rating.json文件，读取每行数据并将其插入到链表中。数据的读取过程中，我们使用字符串的find和substr函数，根据每个字段的名字和位置，从字符串中提取出对应的字段信息。最后调用printList函数遍历链表并打印每个节点的信息。

注意：这里我们没有进行json格式的严格解析，而是通过字符串的查找和截取实现了一个简单的解析。如果需要处理更复杂的json数据，建议使用现成的json解析库。