internal static void pp()
{
Network net = new Network();
// number of materials
int m = 3;
// limit of each material
int[] limit = new int[] { 1650, 1400, 1800 };
// number of products
int n = 2;
// profit of each product
int[] p = new int[] { 5, 4 };
// amount of materials required to make each product
int[][] a = new int[][] { new int[] { 15, 10, 9 }, new int[] { 11, 14, 20 } };
// initialize variables for products
IntVariable[] x = new IntVariable[n];
for (int j = 0; j < n; j++)
{
x[j] = new IntVariable(net);
x[j].Ge(0);
}
// generate constraits of limiting materials
for (int i = 0; i < m; i++)
{
IntVariable sum = new IntVariable(net, 0);
for (int j = 0; j < n; j++)
{
sum = sum.Add(x[j].Multiply(a[j][i]));
}
sum.Le(limit[i]);
}
// total profit
IntVariable profit = new IntVariable(net, 0);
for (int j = 0; j < n; j++)
{
profit = profit.Add(x[j].Multiply(p[j]));
}
// maximize the total profit
net.Objective = profit;
// iteratively find a better solution until the optimal solution is found
Solver solver = new DefaultSolver(net, Solver.Maximize | Solver.Better);
for (solver.Start(); solver.WaitNext(); solver.Resume())
{
Solution solution = solver.Solution;
Console.WriteLine(solver.GetCount());
Console.Out.WriteLine("Profit = " + solution.GetIntValue(profit));
for (int j = 0; j < n; j++)
{
Console.Out.WriteLine("x[" + j + "]=" + solution.GetIntValue(x[j]));
}
Console.Out.WriteLine();
}
solver.Stop();
Console.ReadLine();
}
