C++标准库处理字符流时getline的一个坑

一、描述

如果字符流最后没有一个空白行，那么getline处理最后一行的数据时，seekg会失效

二、代码测试

#include <sstream>#include <iostream>using namespace std;int main(int argc, char** argv){    const char* cs = "line1\nline2\nline3";    stringstream ss(cs);    for (int i = 0; i < 2; ++i)    {        streamoff pos = ss.tellg();        string s;        getline(ss, s);        cout << s << endl;        cout << "**" << endl;        cout << pos << endl;    }    cout << endl << "------------------------------------------" << endl << endl;    for (int i = 0; i < 2; ++i)    {        streamoff pos = ss.tellg();        string s;        getline(ss, s);        cout << s << endl;        cout << "$$" << endl;        cout << pos << endl;        ss.seekg(pos, ios::beg);    }    return 0;}

代码在linux上，g++ 4.1.2 上显示有问题