#include <iostream>
#include <fstream>
#include <cstdlib>    // for exit
#include <cctype>     // for isspace
#include <string>
using namespace std;

#include "prompt.h"

// count # of lines and chars in input file

int main()
{
    long numChars = 0;
    long numLines = 0;
    long numWords = 0;
    char ch;
    bool inWord = false;  // initially not reading a word
    
	string filename = PromptString("enter name of input file: ");
    ifstream input;
    input.open(filename.c_str());

    if (input.fail() )
    {   cout << "could not open file " << filename << endl;
        exit(1);
    } 
    while (input.get(ch))      // reading char succeeds?
    {   if ('\n' == ch)        // read newline character
        {   numLines++;          
        }
        numChars++;
        if (isspace(ch))
        {   if (inWord)       // just finished a word
            {   inWord = false;
                numWords++;
            }
        }
        else                  // not a space
        {   if (! inWord)     // just started a word
            {   inWord = true;
            }
        }
    }
    if (inWord) numWords++;   // ended in a word
    
    cout << "lines = " << numLines
         << "\tchars = " << numChars 
         << "\twords = " << numWords << endl;
    return 0;
}