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 10012012, 04:06 AM #1Member
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I Need Help With Constructing A Pair! thank you! Please Help!
hello thanks for looking, i was doing home work that tells me i have to construct a pair for 2 numbers to do the following things:
the sum
the difference
the product
the average
the distance (abs val)
maximum ( larger of two)
minimum(smaller of two)
so far here is my code:
Java Code:class Pair { /** Constructs a pair @param aFirst the first value of the pair @param aSecond the second value of the pair */ public Pair(double aFirst, double aSecond){ first = double aFirst; //line 10 gets error ...\src\Pair.java:10: error: '.class' expected first = double aFirst; second = double aSecond; //line 11 gets error ...\src\Pair.java:11: error: '.class' expected second = double aSecond; } /** Computes the sum of the values of this pair. @return the sum of the first and second values */ public double getSum(){ double sum = (first + second); return sum; } /** Computes the difference of the values of this pair @return the difference of the first and second values */ public double getDifference(){ double difference = (first  second); return difference; } /** Computes the product of the values of this pair @return the product of the first and second values */ public double getProduct(){ double product = (first * second); return product; } /** Computes the average of the values of this pair @return the average of the first and second values */ public double getAverage(){ double average = (first + second / 2); return average; } /** Computes the distance of the values of this pair. @return the distance of the first and second values */ public double getDistance(){ double distance = (first / second); return distance; } /** Computes the maximum of the values of this pair. @return the maximum of the first and second values */ public double getMaximum(){ double maximum = (first * 2 * second * 2); return maximum; } /** Computes the minimum of the values of this pair. @return the minimum of the first and second values */ public double getMinimum(){ double minimum = (first * 2 + second *2); return minimum; } }
thank you so much and please help!
Alex =)Last edited by Czajkus; 10012012 at 07:11 AM.
 10012012, 04:39 AM #2Member
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Re: I Need Help With Constructing A Pair! thank you! Please Help!
public Pair(double aFirst, double aSecond){
first = double aFirst; //line 10 gets error ...\src\Pair.java:10: error: '.class' expected first = double aFirst;
second = double aSecond; //line 11 gets error ...\src\Pair.java:11: error: '.class' expected second = double aSecond;
}
second = double aSecond to second = aSecond;
I am also assuming that you already have defined first and second as instance variables in your program
 10012012, 05:37 AM #3Member
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Re: I Need Help With Constructing A Pair! thank you! Please Help!
Thank you so much for replying +) ive tried every possible thing and i still get the same or worse error amount!
maybe my instance variable arent defined properly? any ideas?
sorry for being such a noob im in highschool so this stuff is pretty complicated
thanks in advance!
Alex
 10012012, 10:49 AM #4Member
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Re: I Need Help With Constructing A Pair! thank you! Please Help!
Java Code:public class Pair { //your instance variables private double first; private double second; //your constructor public Pair(double aFirst, double aSecond) { first = aFirst; // this is where your problem was second = aSecond; } //then your methods (your methods looks fine to me) public double getSum() { return first + second; } // and all other methods }
Thanks
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