Answer Posted / praveenkumar managuli

char s[]; this allocate memory equal tosize of string
and char *s; holds the address of first charecter

Why do we use header files in c?

1081

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why programs in c are running with out #include? some warnings are display in terminal but we execute the program we get answer why? eg: main() { printf("hello world "); }

1772

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what is use of malloc and calloc?

1910

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What are the two types of functions in c?

1018

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What are the advantages of external class?

1071

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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.

1990

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write a program to copy the string using switch case?

2909

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What is difference between structure and union in c programming?

1117

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What is difference between structure and union?

1139

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Write a program to swap two numbers without using third variable in c?

1138

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can any one tel me wt is the question pattern for NIC exam

1990

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Describe static function with its usage?

1217

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Is there anything like an ifdef for typedefs?

1156

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What is c language used for?

990

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Does free set pointer to null?

1015

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