|
ECS 30A |
Homework #4 |
Fall 2008 |
Due: Wednesday, October 29. Programs: 11:59pm using handin to cs30a p3
directory.
Filenames: display.c, gcd.c,
efficiency.c, temperature.c
Programming: All programs
should be able to compile with no warnings when compiled with the –Wall option. You should put your name(s) in a comment on
the first line of each file. The
prompts, and output format of each program must match the examples exactly. To use functions from math.h, you must have
–lm on your compile line (that is an “l” as in library) to link with the math
library, e.g., gcc –Wall –lm gcd.c
#2,
page 250. Filename: display.c
You must use a nested of for loops.
[…@pc…]$display.out
0
0 1
0 1 2
0 1 2 3
0 1 2 3 4
0 1 2 3
0 1 2
0 1
0
[…@pc…]$
#3, page 273.
Filename: gcd.c
If you “man abs”, you can determine which header file will
provide the prototype for abs().
[…@pc…]$ gcd.out
Please enter two integers> 735 252
The greatest common denominator is 21.
[…@pc…]$ gcd.out
Please enter two integers> 60 20
The greatest common denominator is 20.
[…@pc…]$
#4, page 274.
Filename: efficiency.c
[…@pc…]$
cat carpool.txt
4
75 11.0
2
50 9.0
5
95 15.5
2
60 4.5
4
35 4.3
6
70 20.7
0
0 0
[…@pc…]$
efficiency.out
Please
enter the minimum efficiency> 25
[…@pc…]$
cat effic.txt
CARPOOLS MEETING MINIMUM PASSENGER
EFFICIENCY OF 25 PASSENGER KM / L
Passengers Weekly Commute Gasoline Efficiency Weekly
(km) Consumption(L) (pass km / L) Subsidy($)
4 75 11.0 27.3 24.00
5 95 15.5 30.6 38.00
2 60 4.5 26.7 9.60
4 35 4.3 32.6 11.20
[…@pc…]$
#6, page 275 Filename: temperature.c
The user will terminate their input by pressing Ctrl-N
[…@pc…]$ temperature.out
Please enter the temperatures (Ctrl-N to end).
55 62 68 74 59 45 41 58 60 67 65 78 82 88 91
92 90 93 87 80 78 79 72 68 61 59
There were 6 cold days, 14 pleasant days, and 6 hot
days.
The average temperature was 71.2 degrees.
[…@pc…]$