ConstraintSystem.Solve Method
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Solves a model by using the default solver parameters.
Namespace: Microsoft.SolverFoundation.Solvers
Assembly: Microsoft.Solver.Foundation (in Microsoft.Solver.Foundation.dll)
Syntax
'Declaration
Public Function Solve As ConstraintSolverSolution
public ConstraintSolverSolution Solve()
public:
ConstraintSolverSolution^ Solve()
member Solve : unit -> ConstraintSolverSolution
public function Solve() : ConstraintSolverSolution
Return Value
Type: Microsoft.SolverFoundation.Solvers.ConstraintSolverSolution
The solution of a model by using the default solver parameters.
Examples
The following code demonstrates how to use the ConstraintSystem object to solve the Zebra logic puzzle. For more examples, see Samples for Solver Foundation.
delegate CspTerm NamedTerm(string name);
public static void Zebra() {
ConstraintSystem S = ConstraintSystem.CreateSolver();
var termList = new List<KeyValuePair<CspTerm, string>>();
NamedTerm House = delegate(string name) {
CspTerm x = S.CreateVariable(S.CreateIntegerInterval(1, 5), name);
termList.Add(new KeyValuePair<CspTerm, string>(x, name));
return x;
};
CspTerm English = House("English"), Spanish = House("Spanish"),
Japanese = House("Japanese"), Italian = House("Italian"),
Norwegian = House("Norwegian");
CspTerm red = House("red"), green = House("green"),
white = House("white"),
blue = House("blue"), yellow = House("yellow");
CspTerm dog = House("dog"), snails = House("snails"),
fox = House("fox"),
horse = House("horse"), zebra = House("zebra");
CspTerm painter = House("painter"), sculptor = House("sculptor"),
diplomat = House("diplomat"), violinist = House("violinist"),
doctor = House("doctor");
CspTerm tea = House("tea"), coffee = House("coffee"),
milk = House("milk"),
juice = House("juice"), water = House("water");
S.AddConstraints(
S.Unequal(English, Spanish, Japanese, Italian, Norwegian),
S.Unequal(red, green, white, blue, yellow),
S.Unequal(dog, snails, fox, horse, zebra),
S.Unequal(painter, sculptor, diplomat, violinist, doctor),
S.Unequal(tea, coffee, milk, juice, water),
S.Equal(English, red),
S.Equal(Spanish, dog),
S.Equal(Japanese, painter),
S.Equal(Italian, tea),
S.Equal(1, Norwegian),
S.Equal(green, coffee),
S.Equal(1, green - white),
S.Equal(sculptor, snails),
S.Equal(diplomat, yellow),
S.Equal(3, milk),
S.Equal(1, S.Abs(Norwegian - blue)),
S.Equal(violinist, juice),
S.Equal(1, S.Abs(fox - doctor)),
S.Equal(1, S.Abs(horse - diplomat))
);
bool unsolved = true;
ConstraintSolverSolution soln = S.Solve();
while (soln.HasFoundSolution) {
unsolved = false;
System.Console.WriteLine("solved.");
StringBuilder[] houses = new StringBuilder[5];
for (int i = 0; i < 5; i++)
houses[i] = new StringBuilder(i.ToString());
foreach (KeyValuePair<CspTerm, string> kvp in termList) {
string item = kvp.Value;
object house;
if (!soln.TryGetValue(kvp.Key, out house))
throw new InvalidProgramException(
"can't find a Term in the solution: " + item);
houses[(int)house - 1].Append(", ");
houses[(int)house - 1].Append(item);
}
foreach (StringBuilder house in houses) {
System.Console.WriteLine(house);
}
soln.GetNext();
}
if (unsolved)
System.Console.WriteLine("No solution found.");
else
System.Console.WriteLine(
"Expected: the Norwegian drinking water and the Japanese with the zebra.");
}
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.