c++ - 将一段文本读入字符串 vector

Question

我正在尝试将一段文本读入一个字符串 vector ，然后创建一个字典来记录每个单词出现的次数。到目前为止，它只加载文本的第一个单词，我不确定如何进行。我知道我有点不清楚如何正确使用这些成员函数。

int main()
    {
        ifstream input1;
        input1.open("Base_text.txt");

    vector<string> base_file;
    vector<int> base_count;


    if (input1.fail())
    {
        cout<<"Input file 1 opening failed."<<endl;
        exit(1);
    }

    make_dictionary(input1, base_file, base_count);


}

void make_dictionary(istream& file, vector<string>& words, vector<int>& count)
{


    string line;


    while (file>>line)
    {
        words.push_back(line);
    }

    cout<<words[0];



}

预期输出:

This is some simple base text to use for comparison with other files.
You may use your own if you so choose; your program shouldn't actually care.
For getting interesting results, longer passages of text may be useful.
In theory, a full novel might work, although it will likely be somewhat slow.

实际输出:

This 

Answer 1

我想你得搬家了cout << words[0]在循环内，否则它只会在循环结束时被调用一次。不过，每次迭代只会打印第一个单词。所以，每次打印最后一个词:

while (file>>line)
{
     words.push_back(line);
     cout<<words.back(); // or cout << line, same thing really
}

最后一件事 - while(file >> line)将逐字阅读，而不是像变量名称所暗示的那样逐行阅读。如果需要，请使用 while (getline(file, line)) .