countw2.cpp

来自「C++&datastructure书籍源码,以前外教提供现在与大家共享」· C++ 代码 · 共 28 行

#include <iostream>
#include <fstream>              // for ifstream
#include <string>
#include "prompt.h"

   // count words in a file specified by the user

int main()
{
    string word;
    int numWords = 0;                        // initially no words
    int sum = 0;                             // sum of all word lengths
    ifstream input;
       
	string filename = PromptString("enter name of file: ");

    input.open(filename.c_str());           // bind input to named file
     
    while (input >> word)                   // read succeeded
    {   numWords++;
        sum += word.length();
    }
    cout << "number of words read = " << numWords << endl;
    cout << "average word length = " << sum/numWords << endl;
    
    return 0;
}