Task $1-$ Create a class

Create a class called cuboid. The class has the attributes $($data members$)$ length, width

and height, each of which defaults to $1.$ It has methods $($member functions$)$ that calculate

the perimeter, surface area and volume of the cuboid. It has set and get functions for

length, width and height. The class in your program should be written based on the class

definition in Listing $1.$ The cuboid.h file can be downloaded from Ulwazi.

Listing $1$: cuboid.h

$1$ #ifndef CUBOID$\_$H

$2$ #define CUBOID$\_$H

$3$

$4$ class cuboid

$5\{$

$6$ public: $//$It is good practice to ensure only functions are public members and variables are private

members

$7$ cuboid$($double l $=1\mathrm{.}0,$ double w $=1\mathrm{.}0,$ double h $=1\mathrm{.}0)$;

$8$ void setLength$($double l$)$; $//$Used to set a user defined vaklue for the length

$9$ void setWidth$($double w$)$; $//$Used to set a user defined vaklue for the width

$10$ void setHeight$($double h$)$; $//$Used to set a user defined vaklue for the height

$11$ double getLength$()$; $//$Used to get the value of the length.

$12$ double getWidth$()$; $//$Used to get the value of the width

$13$ double getHeight$()$; $//$Used to get the value of height

$14$ double perimeter$()$; $//$Used to calculate the perimeter of the cuboid

$15$ double surfaceArea$()$; $//$Used to calculate the surface area of the cuboid

$16$ double volume$()$; $//$Used to calculate the volume of the cuboid

$17$

$18$ private: $//$These are private attributes. They can only be accessed using the get and set functions

$19$ double length;

$20$ double width;

$21$ double height;

$22\}$;

$23$

$24$ #endif

The program should read from the input.txt shown in Listing $2.$ For each line in the

input.txt file, the first value represents the length, the second value is the width and the

third value is the height. For example, in the first line the length $=4,$ the width $=5$ and the

height $=6.$ The other lines in the input text file can be read in the same way. An output

in the form shown in Listing $3$ should be generated by your program, where the printed val$-$

ues for the length, width and height are obtained using the getLength$(),$ getWidth$()$ and

getHeight$()$ methods $($functions$)$ in the cuboid class. This output should be written to a

file called output.txt$.$

Listing $2$: input.txt

$1456$

$2723$

$312825$

$49\mathrm{.}515\mathrm{.}2318\mathrm{.}9$

$523\mathrm{.}1835\mathrm{.}49$

$66\mathrm{.}173$

$7202122\mathrm{.}59$

$81116\mathrm{.}0819\mathrm{.}5$

$91\mathrm{.}112\mathrm{.}223\mathrm{.}33$

$105\mathrm{.}239\mathrm{.}518\mathrm{.}59$

Page $2$ of $6$

Listing $3$: output.txt

$1$ Length $=4\mathrm{.}00$ Perimeter $=60\mathrm{.}00$

$2$ Width $=5\mathrm{.}00$ Surface Area $=148\mathrm{.}00$

$3$ Height $=6\mathrm{.}00$ Volume $=120\mathrm{.}00$

$4$

$5$ Length $=7\mathrm{.}00$ Perimeter $=48\mathrm{.}00$

$6$ Width $=2\mathrm{.}00$ Surface Area $=82\mathrm{.}00$

$7$ Height $=3\mathrm{.}00$ Volume $=42\mathrm{.}00$

$8$

$9$ Length $=12\mathrm{.}00$ Perimeter $=180\mathrm{.}00$

$10$ Width $=8\mathrm{.}00$ Surface Area $=1192\mathrm{.}00$

$11$ Height $=25\mathrm{.}00$ Volume $=2400\mathrm{.}00$

$12$

$13$ Length $=9\mathrm{.}50$ Perimeter $=174\mathrm{.}52$

$14$ Width $=15\mathrm{.}23$ Surface Area $=1224\mathrm{.}16$

$15$ Height $=18\mathrm{.}90$ Volume $=2734\mathrm{.}55$

$16$

$17$ Length $=23\mathrm{.}18$ Perimeter $=150\mathrm{.}33$

$18$ Width $=5\mathrm{.}40$ Surface Area $=764\mathrm{.}87$

$19$ Height $=9\mathrm{.}00$ Volume $=1126\mathrm{.}69$

$20$

$21$ Length $=6\mathrm{.}10$ Perimeter $=64\mathrm{.}40$

$22$ Width $=7\mathrm{.}00$ Surface Area $=164\mathrm{.}00$

$23$ Height $=3\mathrm{.}00$ Volume $=128\mathrm{.}10$

$24$

$25$ Length $=20\mathrm{.}00$ Perimeter $=254\mathrm{.}36$

$26$ Width $=21\mathrm{.}00$ Surface Area $=2692\mathrm{.}38$

$27$ Height $=22\mathrm{.}59$ Volume $=9487\mathrm{.}80$

$28$

$29$ Length $=11\mathrm{.}00$ Perimeter $=186\mathrm{.}32$

$30$ Width $=16\mathrm{.}08$ Surface Area $=1409\mathrm{.}88$

$31$ Height $=19\mathrm{.}50$ Volume $=3449\mathrm{.}16$

$32$

$33$ Length $=1\mathrm{.}11$ Perimeter $=26\mathrm{.}64$

$34$ Width $=2\mathrm{.}22$ Surface Area $=27\mathrm{.}11$

$35$ Height $=3\mathrm{.}33$ Volume $=8\mathrm{.}21$

$36$

$37$ Length $=5\mathrm{.}23$ Perimeter $=133\mathrm{.}28$

$38$ Width $=9\mathrm{.}50$ Surface Area $=647\mathrm{.}03$

$39$ Height $=18\mathrm{.}59$ Volume $=923\mathrm{.}64$