File Handling – C++ [ I ]

Simple Data File  - Reading and Writing

Data files are the file which store the data and a program require to write to a file and read from it.

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Example :

 #include <iostream.h>

  class Files

      {

           private:

              char name[20];

              int sal;

           public:

              void FileWrite();

              void FileRead();

      };

  void Files::FileWrite()

      {

           ofstream fptr;

           char ch='y';

           fptr.open("Emp.txt");

           while(ch=='y')

              {

                   cout<<"\n\tEnter Name : ";

                   cin>>name;

                   cout<<"\n\tEnter Salary : ";

                   cin>>sal;

                   fptr<<name<<"  "<<sal<<"\n";

                   cout<<"\n\tWant to continue(y/n)? ";

                   cin>>ch;

              }

           fptr.close();

      }

  void Files::FileRead()

      {

           ifstream fptr;

           char name[20];

           int sal;

           fptr.open("Emp.txt");

           while(!fptr.eof())

              {

                   fptr>>name;

                   fptr>>sal;

                   cout<<name<<"  "<<sal<<"\n";

              }

           fptr.close();

      }

  int main()

      {

           Files F;

           int c=0;

           while(c!=3)

              {

                   cout<<"\n\n\t1. Write\n\t2. Read\n\t3. Exit";

                   cout<<"\n\n\t\tChoice? ";

                   cin>>c;

                   switch(c)

                        {

                            case 1:F.FileWrite();break;

                            case 2:F.FileRead();break;

                            case 3:break;

                        }

              }

      }