Answer Posted / sanjay pal

void main is necessary for every program.from this line
onward the program body starts.
before main there is a word void this means main return
nothing so parentheses() follwing main are also requrid
main is treated as a function in c and c++.

What is a pragma?

1134

---

What is the difference between typedef struct and struct?

1114

---

write a program to generate address labels using structures?

4585

---

How do you view the path?

1138

---

Why can't I perform arithmetic on a void* pointer?

1107

---

What does == mean in texting?

1317

---

Explain what does it mean when a pointer is used in an if statement?

1076

---

Create a simple code fragment that will swap the values of two variables num1 and num2.

1295

---

What does %d do in c?

969

---

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.

1998

---

Explain the difference between null pointer and void pointer.

1096

---

What is meant by high-order and low-order bytes?

1051

---

Why do we need functions in c?

1031

---

Explain the difference between structs and unions in c?

1032

---

What is string function c?

1036

---