command-line argument

1. Please briefly describe what the run time error is in C language.
2. Write a program that prints each command-line argument on a new line.
   Example:
   Input in CMD: ./program hello world
   Output:
3. Write a program that reads a line of text from the user using fgets and prints it 
   back.
   Example:
   Input from the keyboard:
   Output to the screen:
4. Write a program that reads a line of text using fgets and calculates its length 
   (excluding the newline character).
   Example:
   Input from the keyboard:
   Output to the screen:
5. Define a structure Rectangle with two members: length and width. Ask the user 
   to input the length and width of a rectangle. Calculate and output the area and 
   perimeter of the rectangle.
   Input: 
   Output:
6. Define a structure Student with the following members:
   ⚫ name (a string)
   ⚫ roll_number (an integer)
   ⚫ marks (a float)
   Write a program to:
   ⚫ Declare an array of 3 Student structures.
   ⚫ Ask the user to input the details of each student.
   ⚫ Print the name and marks of the student with the highest marks.
   Input: 
   ‘Output: 
   --- Student with Highest Marks ---
   Name: Eva 
   Marks: 90.00
7. Write a C program that defines a Student structure with fields for name and 
   age. Create an array of students, populate it with sample data, and sort the 
   array by student names in alphabetical order.
   Instructions:
8. Define a Structure:
   • Create a struct named Student with the following members:
   • char name[50]; to store the student's name.
   • int age; to store the student's age.
9. Create an Array of Structures:
   • Define an array of Student structures to store information for at 
   least 5 students.
10. Populate the Array:
    • Initialize the array with sample data for student names and ages.
11. Sort the Array:
    • Write a function to sort the array by student names in alphabetical 
    order using a suitable sorting algorithm.
12. Print the Sorted Array:
    • Display the sorted list of students, including their names and age.
    Input: 
    Student 1: 
    Name: Tom
    Age: 32
    Student 2:
    Name: Dick
    Age: 43
    Student 3:
    Name: Jane
    Age: 24
    Output:
    Dick: 43
    Jane: 24
    Tom: 32

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