cin编译错误

[idot]

我在vc2005下新建空白工程，然后在工程下新建代码文件，输入代码如下：
//============================================================================
// Name : covertString.cpp
// Author : wangxiwei
// Version : 1.0
// Copyright : Unknown
//============================================================================

#include <iostream>
using namespace std;

int main() {
string inputed;
cin >> inputed;

if( inputed.length() == 0) {
cout << "can not reverse empty string !" << endl;
}
else{
string converted ;
size_t wordStartPos = inputed.rfind(" ",0,inputed.length());
size_t wordEndPos = string::npos;
while ( wordStartPos >= 0){
converted += inputed.substr(wordStartPos,wordEndPos);
cout << converted << endl;
wordStartPos = inputed.rfind(" ",0,wordStartPos);
}
}
return 0;
}