Practice problems on structures
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Q1.

Define a structure that simulates a complex number. It should have the two
fields, real and imaginary.

Implement the following functions:
(a) Creating a complex number from two real values
(b) Printing a complex number in a + b i format
(c) Finding the length of a complex number
(d) Finding the angle of a complex number
(e) Adding two complex numbers
(f) Multiplying two complex numbers
(g) Returning the conjugate of a complex number

Q2.

Define a structure line segment that contains two points, which are themselves
structures. A point structure contains two fields, x and y.

Implement the following functions:
(a) Find the slope
(b) Find the intercept
(c) Find the length
(d) Find if two line segments intersect

Q3.

Define a structure student that has two fields, roll and name. Name is a char *.

Implement the following functions:
(a) Create a student given a roll number and a name (allocate space properly)
(b) Copy a student (allocate space properly)
(c) Search for a substring in the name