Use the following as the tests.
* 1/2, 2/4
* 5/6, 6/7
Hints:
Fraction f1, f2;
f1.equals(f2);
なりたい
17 年前
2009年4月13日 星期一
Lab 17 : Fraction equality test
Write a program to implement a method that can check whether 2 fractions are equal. You will implement a class called Fraction consisting of a numerator and a denominator. The equality test of 2 fractions should return a boolean value.
Use the following as the tests.
* 1/2, 2/4
* 5/6, 6/7
Hints:
Fraction f1, f2;
f1.equals(f2);
Use the following as the tests.
* 1/2, 2/4
* 5/6, 6/7
Hints:
Fraction f1, f2;
f1.equals(f2);
Lab 16 : Fraction Addition
Write a program to implement a method that can do additions of 2 fractions. You will implement a class called Fraction consisting of a numerator and a denominator. The additions of
2 fractions should be equal to a fraction.
Use 1/2+1/3 as the test.
Hints:
Fraction f1, f2;
f1.add(f2);
2 fractions should be equal to a fraction.
Use 1/2+1/3 as the test.
Hints:
Fraction f1, f2;
f1.add(f2);
2009年3月30日 星期一
Homework 7 : counter
Define a class called Counter whose objects count things. An object of this class records a count that is a nonnegative integer. Include methods to set the counter to 0, to increase the count by 1, and to decrease the count by 1. Include an accessor method that returns the current count value and a method that outputs the count to the screen. Write a program to test
counter.reset();
counter.inc();
counter.inc();
counter.dec();
counter.output();
counter.reset();
counter.inc();
counter.inc();
counter.dec();
counter.output();
Lab 15 : class definition 2
Study Display 4.4 (2nd ed. and 3rd ed.) or Display 4.2 & Display 4.3 (1st ed.) and then
1. Comment out date.setDate(6, 17, year); by // date.setDate(6, 17, year);
2. At the next line below, add date.readInput();
3. Run the program again. Fix any problems you may encouter along the way
.
4. At the last line of your program, add System.out.println(date.month);
and see what happens. Why?
因為month在DateThirdTry.java使用private的宣告，所以受到保護僅限在該Class使用。
1. Comment out date.setDate(6, 17, year); by // date.setDate(6, 17, year);
2. At the next line below, add date.readInput();
3. Run the program again. Fix any problems you may encouter along the way
.4. At the last line of your program, add System.out.println(date.month);
and see what happens. Why?
因為month在DateThirdTry.java使用private的宣告，所以受到保護僅限在該Class使用。
2009年3月27日 星期五
Homework 6
Write a program to calculate average income by gender based on the following data, where F stands for female and M for male.
F 62,000
M 25,000
F 38,000
F 43,000
M 65,000
M 120,000
F 80,000
M 30,100
You should be able to allow users to type in a whole line such as F 80,000 followed by next line M 30,100।
F 62,000
M 25,000
F 38,000
F 43,000
M 65,000
M 120,000
F 80,000
M 30,100
You should be able to allow users to type in a whole line such as F 80,000 followed by next line M 30,100।
2009年3月24日 星期二
Lab 13 : Cosine
Write a Java program to calculate the triangular function as follows:
Cos(x)=1 - x 2 /2!+ x 4/4!- x 6/ 6!...
Cos(x)=1 - x 2 /2!+ x 4/4!- x 6/ 6!...
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