文本分割工具(c\c++)

#include <iostream>

#include <fstream>

#include <string>

using namespace std;

int _tmain(int argc, _TCHAR* argv[])

{

      int count=0,standard;

      char ch;

      string str="";

      char filename[20];

      cout<<"please input a file(.txt):"<<endl;

      gets(filename);

      cout<<"please input the length of each subfile(KB):"<<endl;

      cin>>standard;

      ifstream is(filename);

      if(is.fail())

      {

            cout<<"Open failed"<<endl;

            exit(0);

      }

      string strname;

      int sign=1;

      while(is && count <= 1024*standard)

      {

            strname="c:""test";

            is.get(ch);

            str+=ch;

            if(count==1024*standard|| is.eof())

            {

                  char change[50];

            sprintf(change,"%d",sign);

                  strname+=change;

                  strname+=".txt";

                  ofstream ou(strname.c_str());

                  if(ou.fail())

                  {

                        cout<<"Open fail!(for write)"<<endl;

                  }

                  ou<<str;

                  count=0;

                  sign++;

                  ou.close();

                  str="";

            }

            count++;

      }

      is.close();

      return 0;

}