the exclusive word set

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#include <map>
#include <vector>
#include <iostream>
#include<fstream>
 using namespace std;
 
void restricted_wc(ifstream &removeFile, map<string, int> &wordCount)
 {
 vector<string> excluded; 
string removeWord;
 while(removeFile>>removeWord)
 excluded.push_back(removeWord);
 

cout<<"Enter text(Ctrl+Z to end): "<<endl;
 string word;
 while(cin>>word)
 {
 bool find = false;
 

vector<string>::iterator iter = excluded.begin();
 while(iter != excluded.end())
 {
 if(*iter == word)
 {
 find = true;
 break;
 }
 ++iter;
 }
 

if(!find)
 ++wordCount[word];
 }
 }
 
int main()
 {
 map<string, int> wordCount;
 string fileName;
 

 

cout<<"Enter fileName: "<<endl;
 cin>>fileName;
 ifstream exFile(fileName.c_str());
 if(!exFile)
 {
cout<<"error: can not open file: "<<fileName<<endl;
 return -1;
 }
 

restricted_wc(exFile, wordCount);
 

cout<<"word\t\t"<<"times"<<endl;
 map<string, int>::iterator iter = wordCount.begin();
 while(iter != wordCount.end())
 {
 cout<<iter->first<<"\t\t"<<iter->second<<endl;
 iter++;
 }
 system("pause");
return 0;
 }

why when I typed input.txt and then I typed hellow and pressed enter, it didn't show me anything? very confused :(
You have to press Ctrl+Z (Ctrl+D on Linux).
I press ctrl+z but it shows ^z, still do nothing
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