#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
#include <ctime>
#include <cmath>
#include <conio.h>
#include <windows.h>
using namespace std;


struct ListNode
  {
     string name;
     double value;
     ListNode *next;
     //constructor
     ListNode(string name1, double value1)
     {
       name = name1;
       value = value1;
       next = NULL;
     }
  };

int main()
{
    int menuchoice;

       do{
        cout<<"\n";
    cout<<"*********************************************** \n";
    cout<<"*        Choose the task from the menu                         * \n";
    cout<<"*            1. Print Curent List                                        * \n";
    cout<<"*            2. Add to Current List                                    * \n";
    cout<<"*            3. Write List to New File                                 * \n";
    cout<<"*            4. Exit Program                                            * \n";
    cout<<"*********************************************** \n";
    cin>>menuchoice;
    
    switch (menuchoice)
    {

case 1:
    {
                system("cls"); //clear screen

           // Open the file
   ListNode *numberList = NULL;   // List of numbers

   ifstream numberFile("data.dat");
   if (!numberFile)
   {
        cout << "Error in opening the file of numbers.";
        exit(1);
   }  
   // Read the file into a linked list  
   double number;
   string name, extra;     // Used to read the file

   while (getline(numberFile,name))
   {
       numberFile >> number;
       getline(numberFile,extra);

      //create a node to hold this number
        
      //check to see if the file is empty
       if (numberList == NULL)
           numberList = new ListNode(name, number);
       else
       {
           ListNode *nodePtr;
           nodePtr = numberList;

           while (nodePtr->next !=NULL)
               nodePtr = nodePtr->next;

           nodePtr->next = new ListNode(name, number);
       }
   }
        system("cls"); //clear screen
   // Traverse the list while printing
   cout << endl << "The contents of the list are: " << endl;
   ListNode *ptr = numberList;
   while (ptr != NULL)
   {
       cout <<"Student Name : "<< ptr->name << "\n"; // Process node
       cout <<"Final Grade  : "<< ptr->value << "\n";
       cout <<"\n";// Process node
       ptr = ptr->next;            // Move to next node
   }
    break;}
case 2:
    {
                system("cls"); //clear screen

        string name1, name2;
        double addgrade;
        
        cout<<"Enter the Name of the Student you wish to add.\n";
        cin>>name1;
        cout<<" ";
        cin>>name2;

        cout<<"Enter the final grade \n";
        cin>>addgrade;

        {
    
    ofstream File;               //Names File as ofstream (for output to file)

     File.open("data.dat",ios::app);               //Reopens file to append, if you just used ios::out again, it would erase everything and rewrite the file
     File << endl <<name1 <<" "<<name2<< endl; //Outputs to file
     File << addgrade;     //Outputs last line of file
     File.close();                              //Closes opened file
}

        break;}
case 3:
    {
                system("cls"); //clear screen

        


        
        break;}
case 4:
    {
        system("cls"); //clear screen
        cout<<"WHERE ARE YOU GOING? \n";
        break;}}}
    while (menuchoice != 4);
   return 0;
}

Sarah Barnhill
78
John Simmons
84
Marshall Thornhill
92
Ollie Maynard
94
Michelle Pitchard
94
Thomas Norris
100

#include <fstream>
using namespace std;

int main()
{
string text = "This is a line of text.";
ofstream myfile ("c:\\testing_file_write.txt");

myfile.write((char*)text.data(),(long)text.length());
myfile.close();

  system("pause");

}//