72 lines
2.6 KiB
C++
72 lines
2.6 KiB
C++
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
||
|
|
* Champlain College SDEV-340-81
|
||
|
|
*
|
||
|
|
* C++ Week 4: Assignment (second semester) - Advance File and I/O Operations (2020/06/07)
|
||
|
|
*
|
||
|
|
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
||
|
|
*
|
||
|
|
* Working with File and I/O Operations
|
||
|
|
* Advance File and I/O Operations - Chapter 13 (Page 911)
|
||
|
|
* Programming Challenge (1. File Previewer) Display the first 10 lines of a file on the screen
|
||
|
|
*
|
||
|
|
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
||
|
|
*
|
||
|
|
* Written by Llewellyn van der Merwe <llewellyn.vandermerw@mymail.champlain.edu>, June 2020
|
||
|
|
* Copyright (C) 2020. All Rights Reserved
|
||
|
|
* License GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
|
||
|
|
*
|
||
|
|
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||
|
|
|
||
|
|
#include <iomanip>
|
||
|
|
#include <iostream>
|
||
|
|
#include <fstream>
|
||
|
|
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
// file path
|
||
|
|
string file_path;
|
||
|
|
// get the file path
|
||
|
|
cout << " Enter the file path to your file: ";
|
||
|
|
while (true) {
|
||
|
|
cin >> file_path;
|
||
|
|
// get the file
|
||
|
|
fstream file(file_path.c_str(), ios::in);
|
||
|
|
// check if the file is open
|
||
|
|
if (file.is_open()) {
|
||
|
|
// the input string
|
||
|
|
string line;
|
||
|
|
// little counter
|
||
|
|
int counter = 1;
|
||
|
|
// get the fist line
|
||
|
|
getline(file , line);
|
||
|
|
while (file && counter < 11)
|
||
|
|
{
|
||
|
|
// we print the line number and the line
|
||
|
|
cout << " " << setfill('0') << setw(2) << counter << "| " << line << endl;
|
||
|
|
// get the next line
|
||
|
|
getline(file , line);
|
||
|
|
// count the lines
|
||
|
|
counter++;
|
||
|
|
}
|
||
|
|
// check if we are at the end of the file
|
||
|
|
if (!file)
|
||
|
|
{
|
||
|
|
// print this ending line notice that the whole file was displayed
|
||
|
|
cout << "------------------------------------------------" << endl;
|
||
|
|
cout << " The entire file was displayed above" << endl;
|
||
|
|
cout << "------------------------------------------------" << endl;
|
||
|
|
}
|
||
|
|
// close the file
|
||
|
|
file.close();
|
||
|
|
break;
|
||
|
|
} else {
|
||
|
|
cout << endl;
|
||
|
|
cout << " Woops! The file path (" << file_path << ") does not exist!" << endl;
|
||
|
|
cout << " Please enter the correct file path to your file: ";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|