Description
upload textfile Fraction.java to ilearn
– You need to implement Fraction class which is within package PJ1
See PJ1/Fraction.java and PJ1/FractionInterface.java for specifications
– Compile programs (you are in directory containing Readme file):
javac PJ1/*.java
javac PJ1_Test.java
– Run programs (you are in directory containing Readme file):
// Run tests in Fraction class
java PJ1.Fraction
// Run general test program
java PJ1_Test
– For using IDE Eclipse to create CSC220 projects, you may look at
this video for more info.
https://www.youtube.com/watch?v=vPLVR7FzLy8
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Important: please look at “Cheating and Plagiarism Policy”
http://cs.sfsu.edu/cheating-and-plagiarism-policy
Warning: Don’t copy projects from previous semestsres and others!
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Sample Runs
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=> java PJ1.Fraction
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1. The fraction is 20/-35
Expected result : 20/-35
2. Reduced fraction is 20/-35 4/-7
Expected result : 20/-35 4/-7
3. Move minus sign fraction is 4/-7 -4/7
Expected result : 4/-7 -4/7
4. Move minus sign fraction is -51/-36 51/36
Expected result : -51/-36 51/36
5. Reduced fraction is 51/36 17/12
Expected result : 51/36 17/12
6. Simplify fraction is 250/-35 -50/7
Expected result : 250/-35 -50/7
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Test cases 7 to 11, expected result and simplified result are printed
7. The sum of 7/8 and 9/16 is 184/128 23/16
Expected result : 184/128 23/16
8. The difference of 9/16 and 7/8 is -40/128 -5/16
Expected result : -40/128 -5/16
9. The product of 15/-2 and 1/4 is 15/-8 -15/8
Expected result : 15/-8 -15/8
10. The quotient of -21/2 and 3/7 is -147/6 -49/2
Expected result : -147/6 -49/2
11. The sum of -21/2 and 7/8 is -154/16 -77/8
Expected result : -154/16 -77/8
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12. The double floating point value of 0/10 is 0.0
Expected result 0.0
13. The double floating point value of 1/-3 is -0.3333333333333333
Expected result -0.333333333…
First = -21/2
14. check First equals First:
Identity of fractions OK
Second = 42/-4
15. check First equals Second:
Equality of fractions OK
16. check First compareTo Second:
Fractions == operator OK
Second = 7/8
17. check First compareTo Second:
Fractions < operator OK
18. check Second compareTo First:
Fractions > operator OK
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19. check FractionException: 1/0
Exception: PJ1.FractionException: Denominator is 0
Expected result : FractionException!
20. check FractionException: division
Exception: PJ1.FractionException: Divisor is 0
Expected result : FractionException!
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=> java PJ1_Test
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Operations:
0) exit
1) add 2) subtract 3) multiply 4) divide 5) compareTo
6) equals 7) moveMinusSign 8) reduce 9) toDouble 10) setFraction
Enter an operation number: 10
Tests:
read a fraction x/y, please enter x y : -20 -10
-20/-10 setFraction = -20/-10
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Operations:
0) exit
1) add 2) subtract 3) multiply 4) divide 5) compareTo
6) equals 7) moveMinusSign 8) reduce 9) toDouble 10) setFraction
Enter an operation number: 3
Try to read a fraction x/y, please enter x y : 5 -10
Read OK:5/-10
Try to read a fraction x/y, please enter x y : -1 -2
Read OK:-1/-2
Tests:
5/-10 * 5/-10 = 25/100
-1/-2 * -1/-2 = 1/4
5/-10 * -1/-2 = -5/20
-1/-2 * 5/-10 = -5/20
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Operations:
0) exit
1) add 2) subtract 3) multiply 4) divide 5) compareTo
6) equals 7) moveMinusSign 8) reduce 9) toDouble 10) setFraction
Enter an operation number: 7
Try to read a fraction x/y, please enter x y : -10 -20
Read OK:-10/-20
Tests:
-10/-20 convert= 10/20
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Operations:
0) exit
1) add 2) subtract 3) multiply 4) divide 5) compareTo
6) equals 7) moveMinusSign 8) reduce 9) toDouble 10) setFraction
Enter an operation number: 1
Try to read a fraction x/y, please enter x y : -5 -10
Read OK:-5/-10
Try to read a fraction x/y, please enter x y : 7 -3
Read OK:7/-3
Tests:
-5/-10 + -5/-10 = 100/100
7/-3 + 7/-3 = -42/9
-5/-10 + 7/-3 = -55/30
7/-3 + -5/-10 = -55/30
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Operations:
0) exit
1) add 2) subtract 3) multiply 4) divide 5) compareTo
6) equals 7) moveMinusSign 8) reduce 9) toDouble 10) setFraction
Enter an operation number: 0
=>
