Replace tab, space

//g++ 4.6.1编译通过！
#include <fstream>
#include <iostream>
#include <algorithm>
#include <iterator>
#include <string>

int main(int argc, char** argv)
{
    using namespace std;
    if (argc!=2)
    {
        clog << "\t防河蟹——空格、制表符替换程序" << endl;
        clog << "用法：" << argv[0] << " 程序名" << endl;
        clog << "在Windows下，您可以简单的将所需替换的原代码文件拖到本程序上" << endl;
        return 1;
    }
    ifstream fileIn(argv[1]);
    if (!fileIn.is_open())
    {
        cerr << "打开文件失败！" << endl;
        return 1;
    }

    string filename(argv[1]);
    filename.insert(filename.rfind('.'), ".Modified");
    ofstream fileOut(filename.c_str());
    for (istreambuf_iterator<char> ibeg(fileIn), iend; ibeg != iend; ++ibeg)
    {
        switch (*ibeg)
        {
        case ' ':
            fileOut << "&#160;";
            break;
        case '\t':
            fileOut << "&#160;&#160;&#160;&#160;";
            break;
        default:
            fileOut << *ibeg;
            break;
        }
    }
    clog << "目标文件“" << filename << "”已生成！" << endl;
    clog << "替换完成！" << endl << "请使用贴吧经典版发帖！" << endl;
}