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OUTPUT (after running):
Type a line of text and press Enter key
I am Dr. Rajiv Chopra
/* now reading data from the file */
   #include
   #include
   void main( )
    {
       FILE *fp;
       char ch;
       clrscr( );
       if ((fp = fopen(“test1.dat”, “r”)) = =NULL)
        {
          printf(“\n Cannot open file”);
          exit(1);
        }
       while ((ch = fgetc (fp)) != EOF)
          putchar(ch);
       fclose(fp);
       getch( );
    }
OUTPUT (after running):

---

I am Dr. Rajiv Chopra
NOTE
If you have to read and write strings rather than characters (as shown above), we use
the fputs( ) and puts( ) functions.
Example
 2: Write a C program to
(a)  
Write integer data into a file.
(b)  
Read the same data from the file.
Solution 2(a):
      #include
      #include
      void main( )
       {
            FILE *fp;
            char ch;
            clrscr( );
            if ((fp = fopen(“test1.dat”, “r”)) = =NULL)
            {
                  printf(“\n Cannot open file”);
                  exit(1);
            }
            while (ch = =’y’)
             {
                  printf(“\n Enter any integer:”);
                  scanf(“%d”, &n);
                  putw (n, fp);
                  printf(“\n Want to eneter another number (y/n)?”);
                  ch = tolower (getche( ));
             }
             fclose (fp);
            }