Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
C:\Users\x>cd desktop
C:\Users\x\Desktop>d2.pl

 Press 1 to insert new data:
 Press 2 to view data:
 Press 3 to call specific data:   1


 Enter Student's Name: A

 Enter Age (yr): 50

 Enter Regn Number: r1


 Press 1 to insert new data:
 Press 2 to view data:
 Press 3 to call specific data:   1


 Enter Student's Name: B

 Enter Age (yr): 40

 Enter Regn Number: r2


 Press 1 to insert new data:
 Press 2 to view data:
 Press 3 to call specific data:   1


 Enter Student's Name: C

 Enter Age (yr): 30

 Enter Regn Number: r3


 Press 1 to insert new data:
 Press 2 to view data:
 Press 3 to call specific data:   2



 Here goes the Final Database:

A:50:r1
B:40:r2
C:30:r3

 Press 1 to insert new data:
 Press 2 to view data:
 Press 3 to call specific data:   3  

Use of uninitialized value $reg_no in hash element at C:\Users\x\Desktop\d2.pl line 52, <STDIN> line 17.

 Enter the Regn Number for detailed information: