c++流

#include<iostream>
#include <string>
#include <vector>
#include <fstream>
using namespace std;

int fileToVector(string fileName ,vector<string>& svec){ 
 ifstream inFile(fileName.c_str());
 if(!inFile)
  return 1;
 string s;
 while (inFile >> s)
  svec.push_back(s);
 inFile.close();
 if (inFile.bad())
  return 2;
 if(inFile.eof())
  return 4;
 if(inFile.fail())
  return 3;
}

int main(){
 vector<string> svec;
 string fileName;
 cout<<"Enter fileName:"<<endl;
 cin>>fileName;

 switch(fileToVector(fileName,svec)){
  case 1:
   cout<<"error,cannot open the file"<<fileName<<endl;
   return -1;
  case 2:
   cout<<"system error!"<<endl;
   return -1;
  case 3:
   cout<<"read error!"<<endl;
   return -1;
 }

 for(vector<string>::iterator iter = svec.begin();iter!=svec.end();++iter)
  cout<<*iter<<" ";
 
 return 0;
}