Todo List in C++

By Mayank Chopra

This project basically maintains arecord of your completed and uncompleted tasks separately using file handling in C++ language. You can add, delete and modify your (todos) tasks.

Basically, it is a command-line argument task, it includes the following - 

- help -    it is used to guide the user about the no of actions that can be performed.

- add -     it is used to add a task

- del -      it is used to delete a task

- done -   it is used to ensure that the task marked as completed. 

-report  - it is used to display the no of completed and uncompleted tasks.

-ls  -        it is used to list the no of uncompleted tasks.

 

In the below code vector actually means string type vector 

To make the below code workable, you have to define a macro in the code  as - 

    // at line 3 mentioned in code.

// Further you can also refer to code available in the project File(todo.cpp) that is workable.

{  // main code

#include<bits/stdc++.h>
using namespace std;
// 3 line
int main(int arg ,char ** arv) {
if(arg == 1) {					//basic guide for using todo list

  cout << "Usage :-" << "\n" << "$ ./todo add " << "\"todo item\"" 
  << "  # Add a new todo"<<"\n"<< "$./todo ls         # Show remaining todos"
  << "\n" << "$ ./todo del NUMBER       # Delete a todo"<<"\n" 
  << "$ ./todo done NUMBER      # Complete a todo"<<"\n" 	
  << "$./todo help              # Show usage" << "\n"
  << "$ ./todo report           # Statistics" << "\n";

  return 0;
}
else if(*arv[1] == 'h') {				//help
  cout << "Usage :-" << "\n" << "$ ./todo add " 
  << "\"todo item\"" << "  # Add a new todo" << "\n" 
  << "$./todo ls                # Show remaining todos"<< "\n" 
  << "$ ./todo del NUMBER       # Delete a todo" << "\n"
  << "$ ./todo done NUMBER      # Complete a todo" << "\n"
  << "$./todo help              # Show usage"<< "\n"
  << "$ ./todo report           # Statistics" << "\n";
  return 0;
}
string rr=arv[1];
time_t ttime = time(0);
tm *local_time = localtime(&ttime);
fstream fio;
string line; 
fio.open("todo.txt", ios::out | ios::in |ios::app) ; 

if(rr=="add") {					//add 
  vector v;
  line=arv[2];
  cout<<"Added todo:"<<" "<<line<<endl;
  fio <<line<<endl;
  fio.seekg(0, ios::beg); 
  while(fio) {
 
    string str;
    getline(fio,str);
    v.push_back(str);

    }
  if(v.size()>1) {
    reverse(v.begin(),v.end());
    fio.close();
    fio.open("todo.txt", ios::out | ios::in | ios::trunc) ;

    for(int i=1;i<v.size();i++) {

      fio<<v[i]<<endl;
    } 

    }

} //if ended

else if(rr=="del") {				//delete

  string x=arv[2];
  int z;
  string t;
  vector p;
  while(fio) {

    getline(fio,t);
    p.push_back(t);
    }	
  fio.close();
  z=stoi(x);
  if(z==0 || z>(p.size()-1) || z<0) {

    cout<<"todo #"<<z<<"does not exist"<<endl;
    return 0;
    }

  cout<<"Deleted todo #"<<z<<endl;
  fio.open("todo.txt", ios::out | ios::in | ios::trunc) ;
  for(int i=0;i<p.size()-1;i++) {	
    if(i==(p.size()-1)-z)
    continue;

    else
    fio<<p[i]<<endl;
    }	
}

else if(rr=="ls") {					//list
  fio.seekg(0, ios::beg); 
  vector l;
  while(fio) {    	
    getline(fio, line); 
    
 		l.push_back(line);
    		}
  int a=l.size()-1;
  for(int i=0;i<l.size()-1;i++) {
    if(i==(l.size()-1))
    cout<<"["<<a<<"]"<<l[i];
    else
    cout<<"["<<a<<"]"<<l[i]<<endl;
    a--;
    }

}


else if(rr=="done") {			//done
  int u=local_time->tm_mday;
  int q=local_time->tm_mon;
  int f=local_time->tm_year;
  string str ="x ";
  str=str+to_string(u)+"-"+to_string(q)+"-"+to_string(f)+" ";
  string a=arv[2];
  int n;
  vector g;
  fstream ff;
  ff.open("done.txt",  ios::in | ios::out | ios::app) ; 
  fio.seekg(0, ios::beg); 
  while(fio) {
    string rr;
    getline(fio,rr);
    g.push_back(rr);

    }
  fio.close();
  n=stoi(a);
  if(n==0 || n>(g.size()-1) || n<0) {

    cout<<"todo #"<<n<<"does not exist"<<endl;
    return 0;
    }
  cout<<"Marked todo #"<<n<<" as done ."<<endl;
  fio.open("todo.txt", ios::out | ios::in | ios::trunc) ;

  for(int i=0;i<g.size()-1;i++) {
    
    if(i==(g.size()-1)-n){
      str=str+g[i];
      ff<<str<<endl;
    }

    else
      fio<<g[i]<<endl;
    }
  ff.close();
}
else if(rr=="report") {				//report
  vector j;
  vector n;
  string h;
  cout << local_time->tm_mday <<'/'<< 1 + local_time->tm_mon<<'/'<< 1900 + local_time->tm_year <<" ";
  fio.seekg(0, ios::beg); 
  while(fio) {	
    getline(fio,h);
    j.push_back(h);
  }
  fstream ff;
  ff.open("done.txt",   ios::in | ios::app) ;
  fio.seekg(0, ios::beg); 
  while(ff) {
    getline(ff,h);
    n.push_back(h);
  }
  cout<<"Pending : "<<j.size()-1<<" "<<"Completed : "<<n.size()-1<<endl;; 
}
else
  cout << "invalid command" << "\n";

fio.close(); 
return 0;
}

 

 

 

} // code ends here.

// below is a preview of a program performing different commands mentioned above.

// in above screenshot firstly the file todo.cpp is compiled by MinGW compiler

// then the commands are executed for example - ./a.out add "watering the plants"

// ./ this icon represents that the file is executable 

// a.out represents the file name that is the output 

// add and the string in quotes is an argument that is stored in (**arv) character type pointer to pointer variable .

 

// below is the preview of the uncompleted task file

// In the above file two tasks were added i.e -watering plants and going to market but the second is deleted and shifted to the file which

// has the list of completed tasks with mentioned time which can be seen below.

// above you can see that the second task is shifted to a new file referring to the list of completed tasks.

 

// for details commits and projects description you can refer to the GitHub repo - 

// https://github.com/nseadlc-2020/package-todo-cli-task

// Also you can refer the full code in the Project File.