public static int Main(string[] args)
{
/*
* // If the AMPL installation directory is not in the system search path:
* ampl.Environment env = new ampl.Environment(
* "full path to the AMPL installation directory");
* // Create an AMPL instance
* using (AMPL a = new AMPL(env)) {}
*/
// Create an AMPL instance
using (AMPL ampl = new AMPL())
{
// Get the value of the option preSolve and print
int presolve = ampl.GetIntOption("presolve").Value;
Console.Write("AMPL preSolve is {0}\n", presolve);
// set the value to false (maps to 0)
ampl.SetOption("presolve", false);
// Get the value of the option preSolve and print
presolve = ampl.GetIntOption("presolve").Value;
Console.Write("AMPL preSolve is now {0}\n", presolve);
// Check whether an option with a specified name exists
string value = ampl.GetOption("Solver");
if (value != null)
{
Console.WriteLine("Option Solver exists and has value: " + value);
}
// Check again, this time failing
value = ampl.GetOption("s_o_l_v_e_r");
if (value == null)
{
Console.WriteLine("Option s_o_l_v_e_r does not exists!");
}
// Using nullables (for bool, int and double options)
double?dblvalue = ampl.GetDblOption("does_not_exist");
if (dblvalue.HasValue)
{
Console.WriteLine("Surprisingly, \"does_not_exist\" has a value!");
}
else
{
Console.WriteLine("\"does_not_exist\" does not have a value!");
}
// Error if accessing value
try
{
Console.WriteLine(dblvalue.Value);
}
catch (InvalidOperationException ex)
{
Console.WriteLine("Error while accessing not existing value:");
Console.WriteLine(ex.Message);
}
}
return(0);
}
