读取 C++ 中的文件

Question

I am trying to read a list of words from a file in C++. However, the last word is read twice. I cannot understand why it is so. Can someone help me out?

int main () {

ifstream fin, finn;
vector<string> vin;
vector<string> typo;
string word;
fin.open("F:\\coursework\\pz\\gattaca\\breathanalyzer\\file.in");
if (!fin.is_open())
    cout<<"Not open\n";
while (fin) {
    fin >> word;
    cout<<word<<endl;
    vin.push_back(word);
}
fin.close();
}

Answer 1

Your loop condition is off by one:

 while (fin >> word) {
    cout<<word<<endl;
    vin.push_back(word);
 }

Answer 2

You need to do:

while((fin >> word).good()) {
     vin.push_back(word);
}

Because fin >> word fails and you don't check it.

Answer 3

It's not read twice. It's simply the old value, since fin >> word fails. Use

while(fin >> word)
{
  ...
}

instead. It tries to read and stops loop if it fails.

Answer 4

Check these..

How do you read a word in from a file in C++?

http://www.bgsu.edu/departments/compsci/docs/read.html

http://answers.yahoo.com/question/index?qid=20081216024044AAKidaX