75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Champlain College SDEV-340-81
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*
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* C++ Week 13: Assignment (second semester) - Starting out with C++ Early Objects (9 Edition) (2020/08/08)
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*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*
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* Stacks & Queues - Chapter 18 (Page 1123)
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* Programming Challenge (9. File Reverser)
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* Using a stack data type, reverse the content of a file
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*
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* Written by Llewellyn van der Merwe <llewellyn.vandermerw@mymail.champlain.edu>, Aug 2020
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* Copyright (C) 2020. All Rights Reserved
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* License GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
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*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <stack>
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// Function Declarations
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void readCharFileToStack(std::string &filePath, std::stack<char> &fileContent);
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void writeStackToFile(std::string &filePath, std::stack<char> &fileContent);
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int main() {
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// My test file is one directory up, from the executable
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// Please set the file paths to your test files here
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std::string filePathIn = "../test_file";
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std::string filePathOut = "../test_file_out";
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// initialize the stack content bucket;
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std::stack<char> fileContent;
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// now get the file "in" content
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readCharFileToStack(filePathIn, fileContent);
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// now lets push the characters to a new file "out"
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writeStackToFile(filePathOut, fileContent);
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return 0;
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}
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// Adapted this from https://stackoverflow.com/a/40930254/1429677
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// To read the characters from a file one by one
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void readCharFileToStack(std::string &filePath, std::stack<char> &fileContent) {
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std::ifstream file(filePath);
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char c;
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if(file.is_open()) {
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while(!file.eof()) {
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file.get(c);
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if ((!file.eof())) {
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// set the character to the stack
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fileContent.push(c);
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}
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}
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}
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if(!file.eof() && file.fail())
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std::cout << "error reading " << filePath << std::endl;
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file.close();
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}
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// To write characters to a file one at a time
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void writeStackToFile(std::string &filePath, std::stack<char> &fileContent) {
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std::fstream file(filePath, std::ios::trunc | std::ios::out);
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if(file.is_open()) {
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do {
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file << fileContent.top();
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fileContent.pop();
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} while(!fileContent.empty());
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}
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if(!file.eof() && file.fail())
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std::cout << "error writing to " << filePath << std::endl;
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file.close();
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}
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