如何读取文件中的字符数？

这就是我到目前为止... 这个程序的重点是显示文件中的单词数量，并获取同一文件的单词数量中的字母数量。如何读取文件中的字符数？

#include <iostream> 
    #include <fstream> 
    #include <string> 

    using namespace std; 

    int main() 
    { 
     int numberOfWords = 0, i = 0; 
     char letters = 0; 
     string line; 

     ifstream myFile; 
     myFile.open("text.txt"); 

    //I got this to work, it displays the number of words in the file 
    if (myFile.is_open()) 
    { 
     while (!myFile.eof()) 
    { 
     myFile >> line; 
     i++; 
    } 
    numberOfWords = i; 

    //this is where I'm having trouble. I can't get this code to work for it to display the number of letters in the file. 
    while (!myFile.eof()) 
    { 
     //cout << line << endl; 
     letters = line.length(); 
     letters++; 
    } 
} 
     myFile.close(); 

     cout << "There are " << numberOfWords << " words in the textfile\n" 
      << "There are " << letters << " letters in those " <<  numberOfWords << " words\n"; 

     cin.get(); 

     return 0;

}

来源

2017-03-08 S.Henry

看一看[这里]（http://stackoverflow.com/questions/5605125/why-is-iostreameof在进一步研究之前，请在内部环路条件下考虑错误）。 –

'！myFile.eof（）'当你来到你的第二个循环时已经是真的。你至少要调用'myFile.clear（）'和'myfile.seek（0）'来重新开始读取文件。 –

为什么你需要第二次？您可以在同一个循环中计算字母数量。 'while（myfile >> line）{++ numberOfWords;字母+ = line.length（）; }' – JustRufus

你做错了。

#include <iostream> 
#include <fstream> 
#include <string> 

using namespace std; 

int main() 
{ 
    int numberOfWords = 0, i = 0; 
    int letters = 0; 
    string line; 

    ifstream myFile; 
    myFile.open("text.txt"); 

//I got this to work, it displays the number of words in the file 
if (myFile.is_open()) 
{ 
    while (!myFile.eof()) 
    { 
     myFile >> line; 
     letters += line.length(); 
     //letters++; 
     i++; 

    } 
numberOfWords = i; 

//this is where I'm having trouble. I can't get this code to work for it to display the number of letters in the file. 
//while (!myFile.eof()) 
//{ 
    //cout << line << endl; 

//} 
} 
myFile.close(); 

    cout << "There are " << numberOfWords << " words in the textfile\n" 
     << "There are " << letters << " letters in those " <<  numberOfWords << " words\n"; 

    cin.get(); 

    return 0; 
}

只是计数的单词的字母数，你去穿越线

来源

2017-03-08 16:26:18 Sniper

如何读取文件中的字符数？

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