CSCE 150A - Problem Solving Using Computers Laboratory - Spring 2009
Lab Assignment 5 - 02/12/2009
Name:
Section: 8:00 11:00 12:30 6:30
Problem 1: Practice with Loops
Below are four code segments, including a variable initialization and a loop. Write the value that the
requested variable contains after the loop has completed.
int n, m;
n = 1;
for(m=1;m<=5;m++)
{
n = n*m;
}
What is n?
double x, y;
x = 64.0L;
do
{
y = sqrt(x);
} while ( y > 10 );
What is y?
int a, b;
a = 5;
while ( a < 100 )
{
b = a+2;
a=b*a;
}
What is b?
inte=1,f=1,g;
for(g=0;g<10;g++)
{
int temp = f;
e = f;
f = temp + e;
}
What is f?
Problem 2: Programming Loops
Download loops.zip from the lecture outline. Expand it into your Z: drive and open loops.c. There
are blanks in the implementations of the functions squares and exponents where you need to insert a loop
structure.
ONLY WRITE CODE WHERE INSTRUCTED BY THE COMMENTS.
•squares takes an integer nand outputs all the squares 12,22,32, . . . , n2. The output code is written,
but the loop is missing. Hint: Use a for loop and calculate the square of the conditional variable.
•exponents takes a decimal band an integer mand outputs all powers of bfrom 0 to m:b0,b1, b2, . . . , bm.
The output code is written, but the loop is missing. Hint: keep a counter of the current power, and
use the pow function.
To check your work, type the command testLoops. This will run your program with the input 20 2.5
5. Show the instructor the output. (Hint: if testLoops outputs nothing, then you did it right!)
Bonus: Write the exponents function without using the pow function. Show the instructor your code if
you have done the bonus.