Data File - Steps To Process A File in Your Program

Steps To Process A File in Your Program

The five steps to use files in your C++ program are:

  1. Determine the type of link required.
  2. Declare a stream for the desired type of link.
  3. Attach the desired file to the stream.
  4. Now process as required.
  5. Close the file link with stream.

The complete example program:

/*To get rollnumbers and marks of the students of a class (get from the user) and store these details into a file called 'Marks.dat' */ #include void main( ) { ofstream filout ; // stream decided and declared - steps 1 & 2 filout.open("marks.dat", ios :: out) ; // file linked - step 3 char ans = 'y' ; // process as required - step 4 begins int rollno ; float marks ; while(ans == 'y' || ans == 'Y') { cout << " \n Enter Rollno. :" ; cin >> rollno; cout << " \n Enter Marks :" ; cin >> marks ; filout << rollno << " \n " << marks << " \n " ; cout << " \n Want to enter more records?(y/n)..." ; cin >> ans ; } filout.close( ) ; // delink the file - step 5 }

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