Difference between revisions of "CSC212 Homework 3 2014"
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* Create a new version of your program and call it '''Hw3_2.java'''. | * Create a new version of your program and call it '''Hw3_2.java'''. | ||
| − | * Create a new text file called '''temperatures.dat''', with the contents found on this [[ | + | * Create a new text file called '''temperatures.dat''', with the contents found on this [[Temperature_Data_for_Cardiff_Bute_Park:_Sample| page]]. |
| − | * You will notice that the new | + | * You will notice that the new file will contain lines other than data lines (like the header), and that some data are missing, and replaced by "---". Your program has to be able to skip these non-data without problems. In particular, without generating ''exceptions'' to the operating system! |
| − | + | * Using the program you wrote for [[CSC212 Lab 5 2014|Lab #5]], build Hw3_2.java so that it will look for the max rain and sun recordings, and output 2 lines with the years and the max numbers found. | |
| − | + | <br /> | |
| − | + | ==Requirements== | |
| − | + | <br /> | |
| − | + | * You must declare and use your own exception class. | |
| − | + | * You must use a method to open the file, | |
| − | + | * You must use another method that reads only 1 line at a time from the input file and returns the year, rain and sun data found on that line. You can use an ''array'' or a ''triplet'' to pass these numbers back to the main program. | |
| + | <br /> | ||
| + | ==Submission== | ||
| + | <br /> | ||
| + | * Submit your program to Moodle, Problem 2 Section. | ||
| + | <br /> | ||
| + | <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /> | ||
| + | [[Category:Java]][[Category:CSC212]] | ||
Revision as of 16:00, 24 September 2014
--D. Thiebaut (talk) 16:21, 24 September 2014 (EDT)
This homework is due on Oct. 2nd, 2014, at 11:55 p.m.
Contents
Problem #1
- Create a text file in your directory with the following lines. Call it temperatures0.dat:
1977 9 18.3 8.1 0 48.6 117.9
1977 10 15.4 9.0 0 76.0 80.4
1977 11 10.3 4.7 4 147.9 76.4
1977 12 9.6 4.6 2 88.0 25.6
1978 1 7.5 2.0 6 134.1 64.7
1978 2 6.2 0.9 13 134.1 56.9
1978 3 10.6 3.9 3 121.3 122.4
1978 4 10.9 3.7 4 63.6 118.6
1978 5 17.3 7.5 0 30.6 188.1
1978 6 18.5 9.5 0 29.6 177.3
1978 7 18.7 11.8 0 110.1 115.8
1978 8 19.6 11.4 0 40.5 164.9
1978 9 18.4 10.2 0 34.1 182.2
1978 10 16.6 9.0 0 12.0 81.1
These numbers are weather numbers for Cardiff Bute Park, in the U.K. The 7 numbers on each line represent the following quantities, shown here with their standard abbreviation:
- the year of the recording (yyyy)
- the month of the recording (mm)
- the max daily temperature in degrees Celcius (tmax)
- the min daily temperature in degrees Celcius (tmin)
- the number of days of frost (af)
- the total rainfall (rain)
- the sunshine duration (sun)
Your Assignment
- Write a program called Hw3_1.java that will
- read the temperature file,
- record the year when the rain was maximum,
- record the year when the sun was maximum,
- output this information on two lines of text:
javac Hw3_1.java java Hw3_1 temperatures0.dat rain 1977 147.90 sun 1978 188.10
Submission
- Submit your program to Moodle, Homework 3, Problem 1
Problem #2
- Create a new version of your program and call it Hw3_2.java.
- Create a new text file called temperatures.dat, with the contents found on this page.
- You will notice that the new file will contain lines other than data lines (like the header), and that some data are missing, and replaced by "---". Your program has to be able to skip these non-data without problems. In particular, without generating exceptions to the operating system!
- Using the program you wrote for Lab #5, build Hw3_2.java so that it will look for the max rain and sun recordings, and output 2 lines with the years and the max numbers found.
Requirements
- You must declare and use your own exception class.
- You must use a method to open the file,
- You must use another method that reads only 1 line at a time from the input file and returns the year, rain and sun data found on that line. You can use an array or a triplet to pass these numbers back to the main program.
Submission
- Submit your program to Moodle, Problem 2 Section.
