编辑：我能够添加并显示多项式但是如何在最后摆脱额外的加号？这是目前显示的内容：
多项式方程
7X ^ 5 + 3×^ 4 + 10×^ 3 + 2×^ 2 + 15X ^ 1 + 5×^ 0 + 1×^ 5 = 8X ^ 5 + 3×^ 4 + 10×^ 3 + 2×^ 2 + 15X ^ 1 + 5×^ 0 +
按Enter退出
最后的加号是我想摆脱^
这是我现在的代码。如果您需要澄清，请告诉我！
static void Main(string[] args)
{
int[] intCoefficients = new int[6] { 5, 15, 2, 10, 3, 7 };
Polynomial firstpolynomial = new Polynomial(5);
Polynomial secondpolynomial = new Polynomial(5, intCoefficients);
Polynomial polynomialthree = new Polynomial();
polynomialthree = firstpolynomial + secondpolynomial;
Console.WriteLine("Polynomial Equation");
Console.WriteLine("");
//call the method
secondpolynomial.Display();
firstpolynomial.Display();
polynomialthree.Display();
Console.WriteLine("");
Console.WriteLine("");
Console.WriteLine("Press Enter to Exit");
Console.ReadLine();
}
}
class Polynomial: IComparable
{
//fields
int intDegree;
int[] intCoefficient = new int[6];
//uses IComparable
int IComparable.CompareTo(Object o)
{
int returnVal = -1;
Polynomial temp = (Polynomial)o;
if (this.Degree > temp.Degree)
{
returnVal = 1;
}
else
{
if (this.Degree < temp.Degree)
{
returnVal = -1;
}
else
{
returnVal = 0;
}
}
return returnVal;
}
//properties
public int Degree
{
get
{
return intDegree;
}
set
{
intDegree = value;
}
}
public int[] Coefficient
{
get
{
return intCoefficient;
}
set
{
for (int x = 0; x < value.Length; x++)
{
intCoefficient[x] = value[x];
}
}
}
//constructors
public Polynomial() //this constructor creates the polynomial 0
{
for (int x = 0; x < intCoefficient.Length; x++)
{
intCoefficient[x] = 0;
intDegree = 0;
}
}
public Polynomial(int intDegree) //creates x^5 polynomial
{
this.intDegree = intDegree;
for (int x = 0; x < intCoefficient.Length; x++)
{
intCoefficient[x] = 0;
}
intCoefficient[intDegree] = 1;
}
public Polynomial(int intDegree, int[] intArray) //creates other polynomial
{
this.intDegree = intDegree;
for (int x = 0; x < intCoefficient.Length; x++)
{
intCoefficient[x] = 0;
}
for (int x = 0; x < intArray.Length; x++)
{
intCoefficient[x] = intArray[x];
}
}
public override string ToString() //creates polynomial equation and returns to Main()
{
string strPolynomial = "";
for (int x = intDegree; x >= 0; x--)
{
if (intCoefficient[x] > 0 && intCoefficient[x] != 1)
{
strPolynomial += intCoefficient[x].ToString() + "x^" + x.ToString() + "+";
}
else
{
if (intCoefficient[x] == 1)
{
strPolynomial += intCoefficient[x].ToString() + "x^" + x.ToString() + "=";
}
}
}
return strPolynomial;
}
//adds first two polynomials together and returns result to the third polynomial
public static Polynomial operator +(Polynomial firstpolynomial, Polynomial secondpolynomial)
{
int intAddedDegree;
int[] intAddedCoefficient = new int[6];
if (firstpolynomial.Degree > secondpolynomial.Degree)
{
intAddedDegree = firstpolynomial.Degree;
}
else
{
intAddedDegree = secondpolynomial.Degree;
}
for (int x = 0; x < intAddedCoefficient.Length; x++)
{
intAddedCoefficient[x] = firstpolynomial.Coefficient[x] + secondpolynomial.Coefficient[x];
}
Polynomial result = new Polynomial(intAddedDegree, intAddedCoefficient);
return result;
}
//display method
public void Display() //couldn't figure out how to make the plus go away
{
for (int x = intDegree; x >= 0; x--)
{
if (intCoefficient[x] > 0 && intCoefficient[x] != 1)
{
Console.Write(intCoefficient[x].ToString() + "x^" + x.ToString() + "+");
}
else
{
if (intCoefficient[x] == 1)
{
Console.WriteLine(intCoefficient[x].ToString() + "x^" + x.ToString() + "=");
}
}
}
}
答案 0 :(得分：0)
不是一个小问题，而且您有许多代码质量问题。尝试理解这个代码，恕我直言更加灵活，简化和健壮。
所有有趣的逻辑都在ToString()中，它创建了一个多项式的字符串。 diplay函数只将ToString()的输出写入控制台窗口。
static class Program
{
internal static void Main(string[] args)
{
int[] intCoefficients = new int[] { 5, 15, 2, 10, 3, 7 };
Polynomial firstpolynomial = new Polynomial(5);
Polynomial secondpolynomial = new Polynomial( intCoefficients );
Polynomial polynomialthree;
polynomialthree=firstpolynomial+secondpolynomial;
Console.WriteLine("Polynomial Equation");
Console.WriteLine();
//call the method
secondpolynomial.Display();
firstpolynomial.Display();
polynomialthree.Display();
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Press Enter to Exit");
Console.ReadLine();
}
}
public class Polynomial : IComparable, IComparable<Polynomial>
{
readonly int[] intCoefficient;
//constructors
public Polynomial() //this constructor creates the polynomial 0
: this(0) { }
public Polynomial(int intDegree) //creates x^5 polynomial
{
this.intCoefficient=new int[intDegree+1];
this.intCoefficient[intDegree]=1;
}
public Polynomial(params int[] intArray) //creates other polynomial
{
this.intCoefficient=intArray;
}
//properties
public int Degree
{
get
{
return intCoefficient.Length-1;
}
}
public int[] Coefficient
{
get
{
return intCoefficient;
}
}
/// <summary>
/// Converts the polynomial to a string representation
/// </summary>
/// <returns>A string object</returns>
public override string ToString()
{
StringBuilder result = new StringBuilder();
for (int i=0; i<=Degree; i++)
{
int coef = intCoefficient[i];
int sign = Math.Sign(coef);
coef=Math.Abs(coef);
if (coef>0)
{
if (sign<0)
{
// always add a leading negative when needed
result.Append("-");
}
else if (result.Length>0)
{
// only add a leading plus if not first term
result.Append("+");
}
// append Cx^i terms
if (coef>1&&i>1)
{
result.AppendFormat("{0}x^{1}", coef, i);
}
else if (coef>1&&i==1)
{
result.AppendFormat("{0}x", coef);
}
else if (coef>1&&i==0)
{
result.AppendFormat("{0}", coef);
}
else if (coef==1&&i==1)
{
result.Append("x");
}
else if (i==0)
{
result.Append(coef.ToString());
}
else
{
result.AppendFormat("x^{0}", i);
}
} // ignore term of coef==0
}
return result.ToString();
}
/// <summary>
/// Adds the coefficients of two polynomials
/// </summary>
/// <param name="firstpolynomial">A polynomial</param>
/// <param name="secondpolynomial">Another polynomial</param>
/// <returns>The resulting polynomial</returns>
public static Polynomial operator +(Polynomial firstpolynomial, Polynomial secondpolynomial)
{
// Always make sure the first polynomial has equal or more terms
if (secondpolynomial.Degree>firstpolynomial.Degree)
{
// Reverse the operation
return secondpolynomial+firstpolynomial;
}
// Result must have same degree as first poly
int result_degree = firstpolynomial.Degree;
int[] result_coef = new int[result_degree+1];
for (int i = 0; i<secondpolynomial.intCoefficient.Length; i++)
{
// Add coefficients from two polynomials
result_coef[i]=firstpolynomial.intCoefficient[i]+secondpolynomial.intCoefficient[i];
}
for (int i = secondpolynomial.intCoefficient.Length; i<result_coef.Length; i++)
{
// Assign remaining coefficients from fist polynomial
result_coef[i]=firstpolynomial.intCoefficient[i];
}
return new Polynomial(result_coef);
}
//display method
public void Display()
{
Console.WriteLine(ToString());
}
public int CompareTo(Polynomial other)
{
// Just compare the order of the polynmomials
return Degree.CompareTo(other.Degree);
}
int IComparable.CompareTo(Object o)
{
if (o is Polynomial)
{
return CompareTo(o as Polynomial);
}
return 0;
}
}
输出
Polynomial Equation
5+15x+2x^2+10x^3+3x^4+7x^5
x^5
5+15x+2x^2+10x^3+3x^4+8x^5
Press Enter to Exit