Click here to Skip to main content
15,124,187 members
Please Sign up or sign in to vote.
0.00/5 (No votes)
See more:
I'm trying to use ArgumentManager.h to read the input and output file, but still some problems here, my code cannot successfully read the file and use reverse the Linked List. Anyone can figure out which part is wrong and help me correct it? I have both input and output file, just need to read both of them, then use the input file to reverse then output.
The input file is
!
awesome is
Joseph
guess I

And output file is
I guess Joseph is awesome!


What I have tried:

C++
<pre>#include <fstream>
#include "ArgumentManager.h"
#include <iostream> 
using namespace std; 
  
struct Node
{ 
  string data; 
  struct Node* next; 
  Node(string data) 
  { 
    this->data = data; 
    next = NULL; 
  } 
}; 
  
struct LinkedList
{ 
  Node* head; 
  LinkedList() 
  { 
    head = NULL; 
  } 
  Node* reverse(Node* node) 
  { 
    if (node == NULL) 
    return NULL; 
    if (node->next == NULL) 
    { 
      head = node; 
      return node; 
    } 
    Node* node1 = reverse(node->next); 
    node1->next = node; 
    node->next = NULL; 
    return node; 
  } 

  void print() 
  { 
    struct Node* temp = head; 
    while (temp != NULL)
    { 
      cout << temp->data << " "; 
      temp = temp->next; 
    } 
  } 
  void push(string data) 
  { 
    Node* temp = new Node(data); 
    temp->next = head; 
    head = temp; 
  } 
}; 
  
int main(int argc, char **argv)
{
  if (argc < 2)
  {
    std::cout << "asd" << std::endl;
  }
  ifstream fin;
  ofstream fout;
  ArgumentManager am(argc, argv);
  string inputFileName = am.get("input");
  string outputFileName = am.get("output");
  fin.open(inputFileName);
  fout.open(outputFileName);
  while(fin)
  {
    string line;
    getline(fin, line);
  }
  
  LinkedList ();

  return 0;
}
Posted
Updated 18-Sep-20 19:03pm

1 solution

Quote:
my code cannot successfully read the file and use reverse the Linked List.

As far as I can see your code reads input file and do nothing with it.
C++
while(fin)
{
  string line;
  getline(fin, line);
}

Your code do not behave the way you expect, or you don't understand why !

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]

1.11 — Debugging your program (stepping and breakpoints) | Learn C++[^]

The debugger is here to only show you what your code is doing and your task is to compare with what it should do.
   

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)




CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900