Answer Posted / nashiinformaticssolutions

lvalue: A location in memory that can appear on the left-hand side of an assignment.
rvalue: The value assigned to an lvalue.

How can you invoke another program from within a C program?

1076

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What are the disadvantages of a shell structure?

1355

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What are directives in c?

974

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How can I ensure that integer arithmetic doesnt overflow?

1173

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Is array a primitive data type in c?

1073

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In which layer of the network datastructure format change is done

1890

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Explain how do you declare an array that will hold more than 64kb of data?

1455

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What is volatile c?

1022

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Explain how do you use a pointer to a function?

1112

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What is the difference between a string copy (strcpy) and a memory copy (memcpy)? When should each be used?

1133

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Is r written in c?

1162

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What is the use of gets and puts?

1035

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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.

1989

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Explain what is wrong with this program statement?

1123

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What do the functions atoi(), itoa() and gcvt() do?

1196

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