How to construct a class?

Question

Construct a class called Term. It is going to represent a term in polynomial expression. It has an integer coefficient and an exponent. In this case, there is only 1 independent variable that is 'x'.

There should be two operations for the Term:

1. public Term times(Term t) - multiplies the term with another term and returns the result
2. public String toString() - prints the coefficient followed by "x^" and appended by the exponent. But with the following additional rules:
3. if the coefficient is 1, then it is not printed.
4. if the exponent is 1, then it is not printed ( the caret is not printed as well)
5. if the exponent is 0, then only the coefficient is printed. 

Input Format

The first line contains the coefficient and the exponent of the first term. The second line contains the coefficient and the exponent of the second term.

Input Sample

1·1

4·3

Output Format

Display the resulting product for each of the test case.

Output Sample

4x^4

Answer 1

class Term

{

private double coefficient;

private int exponent;

public Term(double C, int expo)

{

coefficient = C;

exponent = expo;

}

public double GetCoefficient() { return(coefficient); }

public int GetExponent() { return(exponent); }

public Term Add(Term t)

{

Term termReturn=null;

if (exponent == t.GetExponent())

{

double k = coefficient + t.GetCoefficient();

termReturn = new Term(k,exponent);

}

return(termReturn);

}

public Term Subtract(Term t)

{

Term termReturn=null;

if (exponent == t.GetExponent())

{

double k = coefficient - t.GetCoefficient();

termReturn = new Term(k,exponent);

}

return(termReturn);

}

public Term Multiply(Term t)

{

int expo = exponent+t.GetExponent();

double k = coefficient * t.GetCoefficient();

return (new Term(k,expo));

}

public Term Divide(Term t)

{

Term termReturn=null;

double C = t.GetCoefficient();

if (C!=0)

{

int expo = exponent - t.GetExponent();

double k = coefficient /C;

termReturn = new Term(k,expo);

}

return (termReturn);

}

@Override public String toString()

{

String outbuff="";

if (coefficient==0)

{

outbuff="0";

}

else

{

if (coefficient!=1)

{

outbuff += coefficient;

}

if (exponent!=0)

{

outbuff += "x";

if (exponent>1)

{

outbuff += ("^"+exponent);

}

}

}

return(outbuff);

}

public static void main(String args[])

{

Term t1 = new Term(3,4);

Term t2 = new Term(4,3);

Term t3 = new Term(4,4);

Term t4 = new Term(3,3);

Term result;

result = t1.Add(t3); System.out.println(result.toString());

result = t1.Subtract(t3); System.out.println(result.toString());

result = t1.Multiply(t2); System.out.println(result.toString());

result = t3.Divide(t4); System.out.println(result.toString());

}

}