从C ++中的文件中逐字读取 [英] read word by word from file in C++

问题描述

这个函数应该通过字
读取一个文件字，直到最后一个字，运行停止。

this function should read a file word by word and it does work till the last word, where the run stops

void readFile(  )
{
    ifstream file;
    file.open ("program.txt");
    string word;
    char x ;
    word.clear();

    while ( ! file.eof() )
    {
        x = file.get();

        while ( x != ' ' )
        {
            word = word + x;
            x = file.get();
        }

            cout<< word <<endl;
            word.clear();

    }
}

任何一个看到什么问题如何解决？

any one see what is the problem and how it can be solved??

推荐答案

首先，不要循环 while eof（）），它将无法正常工作，因为 eofbit

First of all, don't loop while (!eof()), it will not work as you expect it to because the eofbit will not be set until after a failed read due to end of file.

其次，正常输入操作符>> 在空格分隔因此可以用于读取字词：

Secondly, the normal input operator >> separates on whitespace and so can be used to read "words":

std::string word;
while (file >> word)
{
    ...
}

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