CMPT
130 Lab 6 - Errors
In this lab
you are going to fix some errors in a small program. Use a text editor and the Terminal to create
and run your program. The program is intended to calculate the volume of a
sphere but contains a number of errors, both compilation errors and logic
errors. Fix all of the errors!
Labs are assessed so make sure that the TA has seen, and marked,
your finished work before you leave the lab.
Program
Copy and
paste the program into your text editor. Then compile it and fix the errors.
/*
*
Calculates the volume of a sphere (4/3
pi r^3)
* e.g.
volume of sphere of radius 1 = 4.19
* volume of sphere of radius 2 = 33.51
* volume of sphere of radius 13.2 =
9,634.08
*/
#include <iostream>
const int PI = "3.14159";
int main()
{
float
radius;
float
volume;
char next
= 'y'
cout << "SPHERE
VOLUME CALCULATOR" << endl;
while
(next = 'y')
cout << endl "Please enter the radius of a
sphere: ";
cin >>
volume;
volume = sphere_volume();
cout << "Radius
= " << radius << endl << "Volume
= " << volme << endl;
cout << endl << "Enter
y to continue, any other key to exit: ";
cin <<
next;
}
return 0;
}
float sphere_volume(float rr)
{
return 4/3 * PI * r * r * r;
Output
The program
should produce output like this.
SPHERE VOLUME CALCULATOR
Please enter the radius of a sphere: 3
Radius = 3
Volume = 113.097
Enter y to continue, any other key to exit: y
Please enter the radius of a sphere: 23
Radius = 23
Volume = 50965
Enter y to continue, any other key to exit: y
Please enter the radius of a sphere: 1.11
Radius = 1.11
Volume = 5.72872
Enter y to continue, any other key to exit: q
Information
You May Need to Know
The volume of
a sphere is equal to 4/3 pr3.
Assessment
1 mark for
completion of the lab, or for getting the program to run – even if it returns
an incorrect value.
John Edgar (johnwill@sfu.ca)