Answer Posted / vinod

C99 and above supports the conceptof VLA(Variable Length Array) which allows you to set array size based on input during run time. It can also done using dynamic memory allocation.

Example:
int main()
{
int i;
scanf("%d",&i);
int a[i];
}

Do you know the difference between malloc() and calloc() function?

1144

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How can I implement sets or arrays of bits?

1129

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In C programming, how do you insert quote characters (‘ and “) into the output screen?

1625

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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.

2087

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What is variable initialization and why is it important?

1404

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Differentiate between null and void pointers.

1270

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Is int a keyword in c?

1067

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List at least 10 sorting methods indicating their average case complexity, worst case complexity and best case complexity.

2836

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What is dynamic dispatch in c++?

1142

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Explain the difference between null pointer and void pointer.

1165

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what is associativity explain what is the precidence for * and & , * and ++ how the folloing declaration work 1) *&p; 2) *p++;

2522

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What is pointer to pointer in c with example?

1205

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develop algorithms to add polynomials (i) in one variable

2269

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The % symbol has a special use in a printf statement. How would you place this character as part of the output on the screen?

1364

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write a c program to find the sum of five entered numbers using an array named number

2266

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