ICS 101 - Computer programming
Lab # 7
(Subroutines
Objectives
SUBROUTINES
A subroutine may return zero, one or many
results. (Remember that a function can return only one result). Unlike function,
a subroutine name can not be used as a
variable to hold results.
Syntax
Example
Following is the output of the program.
Exercise 1
Write a program which reads the length and width of a rectangle and prints the area and perimeter of that rectangle. The area and perimeter must be computed by a subroutine AREAPR called by the program. Use any positive numbers as data.
Exercise 2
Write a program which reads the surface area s of a right circular cylinder. The program then calls a subroutine that computes the radius r and the volume v of that cylinder. And pass them back to the main program. The main program then prints these two values.
Use the data: 155.0
Your output should be in the form:
RADIUS = 6.536668 CM
SURFACE AREA = 155.000000 CM SQUARED
VOLUME = 506.591800 CM CUBED
NOTE:
___ ___
v = pr^{3 }/ Ö 3.0, s = 2pr^{2 }/ Ö 3.0, p = 3.14159
Exercise 3
Write a subroutine that converts a number of seconds into hours, minutes, and seconds. For example, 3724 seconds is 1 hour, 2 minutes, and 4 seconds. Write a main program to test the subroutine.
Exercise 4
Given the number of hours worked by an employee in a week and the payment per hour, write a subroutine that returns the regular payment, over-time payment, and the total payment. The over-time payment is calculated as follows: every hour after 40 is considered as 1.6 hours. Write a main program to test the subroutine.