transport1.cpp
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25 #include "gams.h"
26 #include <iostream>
27 #include <fstream>
28 
29 using namespace gams;
30 using namespace std;
31 
43 int main(int argc, char* argv[])
44 {
45  cout << "---------- Transport 1 --------------" << endl;
46 
47  try {
48  GAMSWorkspaceInfo wsInfo;
49  if (argc > 1)
50  wsInfo.setSystemDirectory(argv[1]);
51  GAMSWorkspace ws(wsInfo);
52  // Retrieves [trnsport] model from GAMS Model Library
53  ws.gamsLib("trnsport");
54 
55  // create a GAMSJob from file and run it with default settings
56  GAMSJob t1 = ws.addJobFromFile("trnsport.gms");
57 
58  // Default run
59  t1.run();
60  cout << "Ran with Defaults:" << endl;
61  for (GAMSVariableRecord rec : t1.outDB().getVariable("x"))
62  cout << "x(" << rec.key(0) << "," << rec.key(1) << "):" << " level=" << rec.level() << " marginal="
63  << rec.marginal() << endl;
64 
65  // Run the job again with another solver
66  GAMSOptions opt = ws.addOptions();
67  opt.setAllModelTypes("xpress");
68  t1.run(opt);
69  cout << "Ran with XPRESS:" << endl;
70  for (GAMSVariableRecord rec : t1.outDB().getVariable("x"))
71  cout << "x(" << rec.key(0) << "," << rec.key(1) << "):" << " level=" << rec.level() << " marginal="
72  << rec.marginal() << endl;
73 
74  // Run the job with a solver option file
75  ofstream xpressopt(ws.workingDirectory() + cPathSep + "xpress.opt");
76  xpressopt << "algorithm=barrier" << endl;
77  xpressopt.close();
78 
79  opt.setOptFile(1);
80  t1.run(opt);
81  cout << "Ran with XPRESS with non-default option:" << endl;
82  for (GAMSVariableRecord rec : t1.outDB().getVariable("x"))
83  cout << "x(" << rec.key(0) << "," << rec.key(1) << "):" << " level=" << rec.level() << " marginal="
84  << rec.marginal() << endl;
85 
86  } catch (GAMSException &ex) {
87  cout << "GAMSException occured: " << ex.what() << endl;
88  } catch (exception &ex) {
89  cout << ex.what() << endl;
90  }
91 
92  return 0;
93 }
void setSystemDirectory(std::string systemDir)
GAMSVariable getVariable(const std::string &name)
void setAllModelTypes(const std::string &solver)
void setOptFile(const int value)
GAMSDatabase outDB()