求助：C++文件操作： 换行 定位修改

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

int fileToVector(string fileName, vector<string> & svec)
{
    ifstream inFile(fileName.c_str());
    if (!inFile)
        return 1;

    string s;
    while (getline(inFile, s))
        svec.push_back(s);
    inFile.close();
    if(inFile.eof())
        return 4;
    if(inFile.bad())
        return 2;
    if(inFile.fail())
        return 3;
}

int main()
{
    vector<string> svec;
    string fileName("E:\\list.txt"), s;

    switch (fileToVector(fileName, svec)) {
    case 1:
        cout << "error: can not open file: "
             << fileName << endl;
    case 2:
        cout << "error: system failure " << endl;
    case 3:
        cout << "error: read failure " << endl;
    return 0;

    return -1;
    }

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