/********************************************************
Xpress-BCL C# Example Problems
==============================
file xbcontr1.cs
````````````````
Contract allocation example.
Combining BCL problem input with problem solving
in Xpress-Optimizer.
(c) 2008 Fair Isaac Corporation
authors: S.Heipcke, D.Brett.
********************************************************/
using System;
using System.Text;
using System.IO;
using BCL;
namespace Examples
{
public class TestContract
{
const int District = 6; /* Number of districts */
const int Contract = 10; /* Number of contracts */
/**** DATA ****/
int[] OUTPUT = {50, 40, 10, 20, 70, 50}; /* Max. output per district */
int[] COST = {50, 20, 25, 30, 45, 40}; /* Cost per district */
int[] VOLUME = {20, 10, 30, 15, 20, 30, 10, 50, 10, 20};
/* Volume of contracts */
/***********************************************************************/
public static void Main()
{
XPRB.init();
int d,c;
XPRBprob p = new XPRBprob("Contract"); /* Initialize a new problem in BCL */
XPRBexpr l1,l2,lobj;
XPRBvar[,] x = new XPRBvar[District,Contract]; /* Variables indicating whether a project
is chosen */
XPRBvar[,] y = new XPRBvar[District,Contract]; /* Quantities allocated to contractors */
TestContract TestInstance = new TestContract();
/**** VARIABLES ****/
for(d=0;d= TestInstance.VOLUME[c]); /* "Size": cover the required volume */
p.newCtr("Min", l2 >= 2 ); /* "Min": at least 2 districts per contract */
}
for(d=0;d0)
System.Console.Write(y[d, c].getName() + ":" + y[d, c].getSol() + ", ");
System.Console.WriteLine();
}
}
return;
}
}
} |
