Answer Posted / lnk

before asnwering please do understand what are
preprocessive directive ....

A preprocessive derectives are used because it would be
easy to change and easy to compile in different execution
environments. Directives in the source file tell the
preprocessor to perform specific actions



# if is #if: This directive executes its associated block
of code if and only if the condition specified along with
this directive is evaluated to true.

#elif: Else-if conditions can be specified using #elif
directive. Block of code associated with #elif directive
will be triggered if the condition specified in this
directive is evaluated to true and the condition specified
by its related if statement is evaluated to false. #elif
block is optional.

#undef: This directive does the reverse process of #define
directive. #undef will reset its associated identifier to
Boolean value “false”.

#pragma: This directive controls the display of warning
message specified using #warning directive. I


so all of them are preprocessive directives ...

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Write a program to maintain student’s record. Record should not be available to any unauthorized user. There are three (3) categories of users. Each user has its own type. It depends upon user’s type that which kind of operations user can perform. Their types and options are mentioned below: 1. Admin (Search Record [by Reg. No or Name], View All Records, Insert New Record, Modify Existing Record) 2. Super Admin (Search Record [by Reg. No or Name], View All Records, Insert New Record, Modify Existing Record, Delete Single Record) 3. Guest (Search Record [by Reg. No or Name], View All Records) When first time program runs, it asks to create accounts. Each user type has only 1 account (which means that there can be maximum 3 accounts). In account creation, following options are required: Login Name: <6-10 alphabets long, should be unique> Password: <6-10 alphabets long, should not display characters when user type> Confirm Password: Account Type: Login Name, Password and Account Type should be stored in a separate file in encrypted form. (Encryption means that actual information should be changed and Decryption means that Encrypted information is changed back to the actual information) If any of the above mentioned requirement(s) does not meet then point out mistake and ask user to specify information again. When Program is launched with already created accounts, it will ask for user name and password to authenticate. On successful authentication, give options according to the user’s type.

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