Display a Text File - C++ File Stream

C++ examples for File Stream:Text File

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Description

Display a Text File

Demo Code

#include <iostream>
#include <fstream>
using namespace std;
#define COL_WIDTH  80//from w w  w  .j a  va 2s.  c o  m
int main() {
   int c;   // input character
   char filename[FILENAME_MAX];
   char input_line[COL_WIDTH + 1];
   cout << "Enter a file name and press ENTER: ";
   cin.getline(filename, FILENAME_MAX);
   ifstream file_in(filename);
   if (! file_in) {
      cout << filename << " could not be opened.";
      cout << endl;
      return -1;
   }
   while (true) {
      for(int i = 1; i <= 24 && !file_in.eof(); ++i) {
         file_in.getline(input_line, COL_WIDTH);
         cout << input_line << endl;
      }
      if (file_in.eof()) {
         break;
      }
      cout << "More? (Press 'Q' and ENTER to quit)";
      cin.getline(input_line, COL_WIDTH);
      c = input_line[0];
      if (c == 'Q' || c == 'q') {
         break;
      }
   }
   return 0;
}

Result


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