一种处理从文件读取整数的方式

#include "stdafx.h"
#include <iostream>
#include <fstream>
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
const char* FILE_NAME = "E://tmp.txt";
fstream in(FILE_NAME);
if(!in)
return -1;
int i;
while(in>>i, !in.eof())
{
if (in.fail())
{
cerr<<"illegal data"<<endl;
in.clear();
char ch;
while((ch = in.get())!=' ');
continue;
}
// ok
cout<<i<<endl;
}
in.close();
return 0;
}