我想返回一个向量函数，<Competition>但被告知竞争是未声明的，并且我正在使用未定义的类'std::vector'

我正在尝试使用我调用vector<Competition> CompPop()的函数构建一个向量。我想返回矢量信息，这是一个类型vector<Competition>。下面是我的函数代码，该函数返回我的Competition类的向量和标头。

收到以下错误(我正在使用Visual Studio，错误消息非常基本，让我猜测我实际上做错了什么(：

-错误 C2065："竞争"：未声明的标识符

"CompPop"使用未定义的类"std：：vector">

"竞争"：未声明的标识符

错误 C2133："信息"：未知大小

错误 C2512："std：：vector"：没有可用的适当默认构造函数

错误 C2065："竞争"：未声明的标识符

错误

C2146：语法错误：标识符"temp"之前缺少";">

错误 C3861："temp"：找不到标识符

错误 C2678：二进制"["：未找到采用类型为"std：：vector"的左侧操作数的运算符(或者没有可接受的转换(

    #pragma once
    #include <fstream>
    #include <sstream>
    #include <iostream>
    #include <string>
    #include <vector>
    #include "LogIn.h"
    #include "Registration.h"
    #include "Tree.h"
    #include "PriorityQueue.h"
    #include "Events.h"
    #include "Competition.h"
    using namespace std;
    vector<Competition> CompPop()
    {
        ifstream myfile("Results.txt");
        string line, tcomp, tleader, tfollower, tevents, tplacement;
        vector<Competition> info;
        istringstream instream;
        if(myfile.is_open())
        {
         int i = 0; // finds first line
         int n = 0; // current vector index
         int space;
         while(!myfile.eof())
         {
        getline(myfile,line);
        if(line[i] == '*')
        {
            space = line.find_first_of(" ");
                
            tleader = line.substr(0+1, space);
            tfollower = line.substr(space + 1, line.size());
        }
        else
        {
            if(line[i] == '-')
            {
                tcomp = line.substr(1, line.size());
                Competition temp(tcomp, tleader, tfollower);
                info[n] = temp;
            }
            else
            {
                if(!line.empty())
                {
                    line = line;
                    space = line.find_first_of(",");
                    tevents = line.substr(0, space);
                    tplacement = line.substr(space + 2,     line.size());
                    info[n].pushEvents(tevents,tplacement);
                }
                if(line.empty())
                {
                    n++;
                }
            }
           }
            }
        }
       else
       {
        cout << "Unable to open file";
       }
       myfile.close();
      return info;
    }

我的比赛标题：

    #pragma once
    #include <fstream>
    #include <sstream>
    #include <iostream>
    #include <string>
    #include <vector>
    #include "LogIn.h"
    #include "Registration.h"
    #include "Tree.h"
    #include "PriorityQueue.h"
    #include "Events.h"
    #include "CompPop.h"
    using namespace std;
    struct Competition
    {
         public:
     Competition(string compName, string lead, string follow)
     {
    Name = compName;
    Leader = lead;
    Follower = follow;
     }
     void pushEvents(string name, string place)
     {
    Events one(name, place);
    Eventrandom.push_back(one);
     }
     string GetName()
     {
    return Name;
     }
     string GetLeader()
     {
    return Leader;
     }
     string GetFollow()
     {
    return Follower;
     }
     string GetEvent()
     {
    return Event;
     }
     string GetScore()
     {
    return Score;
     }
      ~Competition();
     private:
   string Name, Leader, Follower, Event, Score;
   vector<Events> Eventrandom;
     };