public void TestEquationSubtractionSolution()
{
Equation eq = new Equation ();
eq.val1 = 5;
eq.val2 = 5;
eq.type = EquationType.SUBTRACTION;
// 5 - 5 = 0
Assert.AreEqual(0, EquationTarget.CalcSolution(eq));
}
public void TestEquationDivisionSolution()
{
Equation eq = new Equation ();
eq.val1 = 5;
eq.val2 = 5;
eq.type = EquationType.DIVISISON;
// 5 / 5 = 1
Assert.AreEqual (1, EquationTarget.CalcSolution(eq));
}
public void TestEquationMultiplicationSolution()
{
Equation eq = new Equation ();
eq.val1 = 5;
eq.val2 = 5;
eq.type = EquationType.MULTIPLICATION;
// 5 x 5 = 25
Assert.AreEqual(25, EquationTarget.CalcSolution(eq));
}
public void TestEquationAdditionSolution()
{
Equation eq = new Equation ();
eq.val1 = 5;
eq.val2 = 5;
eq.type = EquationType.ADDITION;
// 5 + 5 = 10
Assert.AreEqual(10, EquationTarget.CalcSolution(eq));
}
public EquationTarget(float x, float y, EquationDifficulty diff, Random r) : base(x, y, Color.Red)
{
_eq = GenEquation(diff, r);
}
public static float CalcSolution(Equation eq)
{
switch (eq.type) {
case EquationType.ADDITION:
return eq.val1 + eq.val2;
case EquationType.SUBTRACTION:
return eq.val1 - eq.val2;
case EquationType.MULTIPLICATION:
return eq.val1 * eq.val2;
case EquationType.DIVISISON:
return eq.val1 / eq.val2;
}
// it shouldn't reach this code
return 0.0f;
}
public EquationTarget(float x, float y, EquationDifficulty diff, Random r)
: base(x, y, Color.Red)
{
_eq = GenEquation (diff, r);
}
/// <summary>
/// Generates a random equation.
/// </summary>
/// <returns>The equation.</returns>
/// <param name="diff">Diff.</param>
/// <param name="r">Random generator. This is needed to get unique rand values each time</param>
public static Equation GenEquation(EquationDifficulty diff, Random r)
{
Equation eq = new Equation ();
if (diff == EquationDifficulty.EASY) {
eq.val1 = r.Next (0, 10);
eq.val2 = r.Next (0, 10);
eq.type = (EquationType)r.Next (0, 2);
}
else if (diff == EquationDifficulty.INTERMEDIATE) {
eq.val1 = r.Next (0, 15);
eq.val2 = r.Next (0, 15);
eq.type = (EquationType)r.Next (0, 3);
}
else {
// hard
eq.val1 = r.Next (0, 50);
eq.val2 = r.Next (0, 50);
eq.type = (EquationType)r.Next (0, 4);
}
eq.solution = CalcSolution(eq);
return eq;
}
