Answer Posted / siva prasad

A null pointer is a value. It is a special reserved value used to indicate that the pointer is not pointing to anything conceptually.
A void pointer is a type of pointer, void* . It is used to indicate that the storage location pointed to by the pointer has no specific type.

write a program which the o/p should b in such a way that s triangle if I/p is 3,a Square/rectangle if I/P=4,a pentagon if I/P=5 and so on...forget about the I/P which is less than 3

2077

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What is a lvalue

1081

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Draw a diagram showing how the operating system relates to users, application programs, and the computer hardware ?

2576

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what is use of malloc and calloc?

1895

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What is the size of empty structure in c?

1078

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Difference between Shallow copy and Deep copy?

2019

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we need to calculating INCOME TAX for the person. The INCOME TAX is as follows:- First $10000/- of income : 4% tax Next $10000/- of income : 8% tax Next $10000/- of income : 11.5% tax above $10, 00,00/- : 15% tax What is the Solution of this Question ?

1262

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How many keywords are there in c?

1076

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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.

1981

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What is pass by reference in functions?

842

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What is a macro?

1101

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write a program using linked list in which each node consists of following information. Name[30] Branch Rollno Telephone no i) Write the program to add information of students in linked list

2801

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What is the difference between printf and scanf in c?

1349

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What is identifier in c?

1009

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What does s c mean in text?

1095

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