// Method for solving system of linear equations,
// where count of linear equation = linearequationcount,
// count of unknown members = unknowncount,
// strlist - list of linear equations formated as strings
public string TrySolveLinearEquationSystem(int linearequationcount,
int unknowncount, List<string> strlist)
{
// Result
string result = "";
try
{
// Initialize the system of linear equation from strlist
List<LinearPolynomial> linearequationlist = new List<LinearPolynomial>();
foreach (string str in strlist)
{
LinearPolynomial linPolynomial =
new LinearPolynomial(str);
// If str is a linear polynomial
if (linPolynomial.Members.Count != 0)
linearequationlist.Add(linPolynomial);
}
LinearEquationSystem leSystem =
new LinearEquationSystem(linearequationlist);
// If wrong input data
if (leSystem.LinearEquationCount != linearequationcount
|| leSystem.UnknownCount != unknowncount
|| linearequationcount != strlist.Count)
{
result = "Wrong input system. "
+ "Check the input data for pattern matching "
+ "(look at the example).";
return result;
}
// Try to find the solution of the system
Dictionary<string, string> Solution
= leSystem.FindSolution_MatrixMethod();
foreach (var root in Solution)
result += root.Key + ": " + root.Value
+ " ";
}
catch (Exception exception)
{
// Write to log
logger.WriteLog(System.DateTime.Now.ToString()
+ " "
+ exception.TargetSite.ToString()
+ " "
+ exception.Message);
result = "Wrong input system. "
+ "Check the input data for pattern matching "
+ "(look at the example).";
}
return result;
}
public void ConstructorTestNotValidInputStr(string notValidInputStr)
{
LinearPolynomial lPolynomial =
new LinearPolynomial(notValidInputStr);
// Actual values
SortedDictionary<string, string> actualMembers =
lPolynomial.Members;
int actualUnknownCount = lPolynomial.UnknownCount;
// Asserts
Assert.AreEqual(0, actualUnknownCount);
Assert.AreEqual(0, lPolynomial.Members.Count);
}
public void ConstructorTestValidStr_3_roots(string validInputStr,
string root_1, string root_2, string root_3, string free, int uCount)
{
LinearPolynomial lPolynomial =
new LinearPolynomial(validInputStr);
// Actual values
SortedDictionary<string, string> actualMembers =
lPolynomial.Members;
int actualUnknownCount = lPolynomial.UnknownCount;
// Asserts
Assert.AreEqual(uCount, actualUnknownCount);
Assert.AreEqual(root_1, actualMembers["x"]);
Assert.AreEqual(root_2, actualMembers["y"]);
Assert.AreEqual(root_3, actualMembers["z"]);
Assert.AreEqual(free, actualMembers["!!!"]);
}
