BIT C Programming

List the advantages and disadvantages of global variables. Assume two data files "num1.txt" and "num2.txt" containing integers. Merge these two files into a third file named "file3.txt". The integers in "file3.txt" must be written in sorted order.

How is a nested structure defined and initialized? Explain with an example. Write a program, using structure, to input records of 10 students. Members include name, roll number, and marks obtained in Math, C Program, and English. Display the records of students who have passed in C Program.

When do we use a for loop and a while loop? Compare the while loop and do-while loop with suitable examples. Write a program to find the average, minimum, and maximum age in a class of 20 students.

What do you mean by Flowchart? Draw a flowchart to find the largest among three numbers entered by the user.

Why are array and pointer similar? Write a program to show the similarity between an array and a pointer.

Write a program to find the sum of diagonal elements of an n × n matrix.

How is a keyword different from a variable? Discuss basic data types with their ranges.

What is operator associativity? Explain conditional and logical operators in brief.

Write a program with a function that takes an array as an argument and returns its sum to the main function.

How do you include a file in another file? Illustrate with an example.

Write a program to display the following pattern using the string "NEPAL":
    N
    NE
    NEP
    NEPA
    NEPAL

Write short notes on: 
a. Macro vs Function
b. Break vs Continue