# CSL-101 Computer Programming (Assignment – 3) solved

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Q.1 Consider an employee details are being stored through a C structure that contains the
name of the employee, his/her employee ID and the salary. Write a C program that
prints the employee names whose salary is less than a target salary (user input).
Q.2 Define a structure named census with the following three members:
1. A character array city [ ] to store the city name
2. An integer to store the population of the city
3. A float member to store the literacy level
Write a program to do the following:
a. To read the details of 5 cities using an array of structures.
b. To sort the records based on literacy level and display.
Q.3 Write a C program to create a menu driven program (using switch case) that depicts
the working of a library. Create a structure called library to hold the accession
number, title of the book, author name, price of the book, and flag indicating whether
book is issued or not. Write the functions to:
1. Add book information
2. Display all books information
3. List all books of given author
4. List the count of books currently available in the library of the given title.
5. Exit
Q.4 Define a structure to store the name, an array marks [ ] which stores the marks of five
different subjects and a character grade. Write a program to read and display the
details of the student whose name is entered by the user.
Q.5 Modify Q.4 to print each student’s average marks, subject-wise class average (that
includes average of all the students’ marks).
Q.6 Given the details of n employees (employee name and salary), write a C program
which sorts the employee names according to the length (no of characters) of their
names. If the lengths of employee names are same, then break the tie by alphabetical
order. Finally, display the details of employees in the above mentioned order. You
are free to use library functions under “string.h”.
Q.7 Define a structure that can describe a point in 2-D. A circle in 2D can be specified by
its centre (a point) and radius. Define a structure that can describe a circle in 2D.
Write a C function that does the following. It accepts a circle and a point as
arguments. It returns 1 if the point lies inside the circle but returns 0 otherwise.
Q.8 Construct a structure variable pt which represents a point in Cartesian xy-plane.
Using pt, construct a structure variable tri which represents a triangle in the xy-plane.
Write a C function which accepts a triangle as argument and returns the perimeter of
the triangle. Pick the endpoints of each side and calculate, d =
√(x1 − x2)2 + (y1 − y2)2 The distance between those endpoints gives you the
length of that side. When you have the lengths of all three sides, add them together
to get the perimeter. Write the separate function to calculate the distance d between
two co-ordinates.
Q.9 A polynomial can be represented in a structure with the following members:
1. a float array to store the coefficients
2. an integer to store the degree of the polynomial (highest power in polynomial)
For example, a polynomial 2.3 x4
– 4x + 1.6 has degree, d = 4 and coefficients are
{2.3, 0, 0, -4, 1.6} to be stored in an array. The missing term’s coefficients are
denoted by zero in this array. Represent this structure in C language.
(a) Write a function to read and store the polynomial using structure defined above.
This function should return the polynomial read.
(b) Write a function to add two polynomials p and q represented in the same structure.
Assume both p and q have same degree.
(c) Write a function which takes as parameters a polynomial and value of x and
evaluates the polynomial using Horner’s rule:
a0 x
0
+ a1 x
1
+ a2 x
2
+ a3 x
3
+ a4 x
4
= a0 + x (a1 + x (a2 + x (a3 + x (a4)))) and so on.
The function should return the result calculated from the right hand side
expression.
Q.10 Create a database of (at least 5) students using structures, where in each entry of the
database will have the following fields:
1. a name, which is a string with at most 128 characters
2. their marks in physics which is an int between 0 and 100
3. their marks in chemistry which is an int number between 0 and 100
4. their marks in mathematics which is an int number between 0 and 100
You have to output a list of students in the following order.
1. if a student ‘A’ has lower marks in physics than a student ‘B’, then A’s data is listed
before B.
2. If A and B have the same physics marks and A has lower chemistry marks than B,
then A is listed before B.
3. If A and B have the same marks in physics and chemistry, and A has lower marks
in mathematics than B, then A is listed before B.
4. If all marks are equal and A’s name precedes B’s name in the dictionary order, then
A is listed before B.
Note: You are free to use library functions under “string.h”. Maintain the separate
function to sort/decide ordering.