42d7c276ab
- Fix examples using MPConstraint::Activity instead of MPSolver - Move all examples to exmaples/dotnet - remove netfx sub-directories - Add all examples to target test_dotnet - still few disabled since they are too long - Add tools/generate_examples_csproj.sh to generate .*proj files
78 lines
2.4 KiB
C#
78 lines
2.4 KiB
C#
// Copyright 2012 Hakan Kjellerstrand
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// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using Google.OrTools.LinearSolver;
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public class Volsay {
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/**
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* Volsay problem.
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*
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* From the OPL model volsay.mod.
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*
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* Also see http://www.hakank.org/or-tools/volsay.py
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*/
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private static void Solve() {
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Solver solver = new Solver("Volsay", Solver.CLP_LINEAR_PROGRAMMING);
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//
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// Variables
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//
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Variable Gas = solver.MakeNumVar(0, 100000, "Gas");
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Variable Chloride = solver.MakeNumVar(0, 100000, "Cloride");
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Constraint c1 = solver.Add(Gas + Chloride <= 50);
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Constraint c2 = solver.Add(3 * Gas + 4 * Chloride <= 180);
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solver.Maximize(40 * Gas + 50 * Chloride);
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int resultStatus = solver.Solve();
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if (resultStatus != Solver.OPTIMAL) {
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Console.WriteLine("The problem don't have an optimal solution.");
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return;
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}
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Console.WriteLine("Objective: {0}", solver.Objective().Value());
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Console.WriteLine("Gas : {0} ReducedCost: {1}",
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Gas.SolutionValue(),
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Gas.ReducedCost());
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Console.WriteLine("Chloride : {0} ReducedCost: {1}",
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Chloride.SolutionValue(),
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Chloride.ReducedCost());
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double[] activities = solver.ComputeConstraintActivities();
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Console.WriteLine("c1 : DualValue: {0} Activity: {1}",
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c1.DualValue(),
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activities[c1.Index()]);
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Console.WriteLine("c2 : DualValue: {0} Activity: {1}",
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c2.DualValue(),
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activities[c2.Index()]);
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Console.WriteLine("\nWallTime: " + solver.WallTime());
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Console.WriteLine("Iterations: " + solver.Iterations());
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}
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public static void Main(String[] args) {
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Solve();
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}
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}
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