检测类文件出现错误，请问如何修改

在teseclass文件用到输入运算符时，出现如下错误：

1为什么会显示找不到文件？2第二个错误我查了一下好像是要重载运算符？如果是的话，我没有学过这个知识，现在不知道该怎么处理。
请指点要如何操作！

代码如下：
wordcount.h

#ifndef WORDCOUNT_H
#define WORDCOUNT_H

# include<iostream>
# include<stdio.h>
#include<string>
#include <vector>
 #include <iomanip>
using namespace std;

class Wordcount
{
public:
Wordcount();
string getword();
void removesep();
void removeword();
void saveword();
void descendingsort();
void showwordset();


private:
int pos;//标点符号的位置
int size;//向量的size
string word;//缓存字符
string sep;//标点符号
vector<int> word_num;//单词的频率统计
vector<string> stop_word;//应删去的词
vector<string> word_set;//确认不是stopword词汇后的单词放进去该向量
};
bool flag1,flag2;

#endif

wordcount.cpp

# include<iostream>
# include<stdio.h>
#include<string>
#include <vector>
 #include <iomanip>
 #include"wordcount.h"
using namespace std;



Wordcount::Wordcount()
{
     pos=0;
     size=0;
     string sep(" ,.?!:\"\t\n();");//分隔符号
     vector<int> word_num;//单词的频率统计
     vector<string> stop_word;//应删去的词
     vector<string> word_set;//确认不是stopword词汇后的单词放进去该向量
    stop_word.push_back("to");
    stop_word.push_back("in");
    stop_word.push_back("will");
    stop_word.push_back("of");
    stop_word.push_back("be");
    stop_word.push_back("and");
    stop_word.push_back("a");
    stop_word.push_back("the");
}

string Wordcount::getword()
{
  return word;
}
void Wordcount::removesep()
{
   // 除去每一个word多余的符号
       pos = word.find_first_of(sep);
     if ( pos == word.size()-1) //符号出现在尾部
     {
          string tmp(word.substr(0, pos));
            word = tmp;
     }
     else if (pos == 0)//符号出现在头部
     {
            string::size_type pos2 = word.find_first_not_of(sep, 1);
            pos = word.find_first_of(sep, pos2+1);
            string tmp(word.substr(pos2, pos-1));
            word = tmp;
       }
}
  
void Wordcount::removeword()
{
   // 除去stop word
       flag1=false;
      for (int i = 0; i < stop_word.size(); i++)
      {
        if (word==stop_word[i])
        {
          flag1=true;
        }
      }
}

void Wordcount::saveword()
{
  //判断单词集是否存在单词或者与word相同的单词
    size = word_set.size();
    flag2 = true;
      for (int i=0; i!=size; ++i) 
            if (word_set[i] == word) {
               ++word_num[i];
                flag2 = false;
                break;
           }
 //存入单词集并在次数向量中对应+1
       if (flag2)
       {
           word_set.push_back(word);
           word_num.push_back(1);
       }
}

void Wordcount::descendingsort()
{
  //给单词次数进行降序处理，同时改变单词顺序
     for (int i = 0; i < word_set.size()-1; i++)
  {
    int currentmax = word_num[i];
    int currentmaxindex = i;
    string temps_storage;
    for (int j=i+1; j < word_set.size(); j++)
    {
        if (word_num[j]>currentmax)
        {
            currentmax = word_num[j];
            temps_storage = word_set[j];
            currentmaxindex = j;
        }
    }
    if (currentmaxindex!=i)
    {
        word_num[currentmaxindex] = word_num[i];
        word_num[i]=currentmax;
        word_set[currentmaxindex] = word_set[i];
        word_set[i] = temps_storage;       
    }
  } 
}

void Wordcount::showwordset()
{
   // 输出单词以及对应的频率
     for (int i = 0; i < word_num.size(); i++)
       {
          cout<<word_set[i]<<" "<<word_num[i]<<endl;
       }
}

testclass.cpp

#include "wordcount.h"
# include<iostream>
# include<stdio.h>
#include<string>
#include <vector>
 #include <iomanip>
using namespace std;

int main()
{
    Wordcount wordcount;
    cout<<"please enter the text"<<endl;
    
    while (cin >> wordcount.getword())
    {
       wordcount.removesep();
       wordcount.removeword();
      if (flag1)
      {
        continue;
      }
       wordcount.saveword();
       wordcount.descendingsort();
       wordcount.showwordset();
  
  
    }
    

}

整个main都是错误啊

int main()
{
    Wordcount wordcount;
    cout<<"please enter the text"<<endl;
    
    while (cin >> word)
    {
      removesep();
      removeword();
      if (flag1)
      {
        continue;
      }
      saveword();
      descendingsort();
      showwordset();
  
    }
    
 
}