func main() {
var (
refFile string
outFile string
)
flag.StringVar(&refFile, "ref", "", "File containing desired solution")
flag.StringVar(&outFile, "out", "", "File to contain output")
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
os.Exit(1)
}
dictFile := flag.Arg(0)
// Load input dictionary.
dict := new(lp.Dict)
err := Load(lp.ReadDictColoradoFrom, dictFile, dict)
if err != nil {
log.Fatal(err)
}
// Pivot all the way.
var iter int
var unbounded bool
for {
piv := lp.NextBland(dict)
if piv.Unbounded {
unbounded = true
fmt.Println("unbounded")
break
}
if piv.Final {
fmt.Println("final")
break
}
dict = dict.Pivot(piv.Enter, piv.Leave)
iter++
fmt.Printf("%4d f:%10.3e\n", iter, dict.Obj())
}
var result Solution
if unbounded {
result = Solution{Unbounded: true}
} else {
result = Solution{Value: dict.Obj(), Steps: iter}
}
if refFile != "" {
// Load reference output.
var ref Solution
if err := Load(ReadSolutionFrom, refFile, &ref); err != nil {
log.Fatalln("could not load reference:", err)
}
// Compare.
if err := check(result, ref); err != nil {
log.Println("fail:", err)
}
log.Print("pass")
}
if outFile != "" {
// Save dictionary out.
if err := Save(WriteSolutionTo, outFile, result); err != nil {
log.Fatalln("could not save solution")
}
}
}
func main() {
var (
refFile string
outFile string
)
flag.StringVar(&refFile, "ref", "", "File containing desired solution")
flag.StringVar(&outFile, "out", "", "File to contain output")
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
os.Exit(1)
}
dictFile := flag.Arg(0)
// Load input dictionary.
dict := new(lp.Dict)
err := Load(lp.ReadDictColoradoFrom, dictFile, dict)
if err != nil {
log.Fatal(err)
}
// Make the pivot.
var soln Solution
piv := lp.NextBland(dict)
if piv.Unbounded {
// The initial dictionary was unbounded.
soln.Unbounded = true
} else {
if piv.Final {
// The initial dictionary was final.
soln.Final = true
} else {
// Possible to make a pivot.
soln.Enter = dict.NonBasic[piv.Enter]
soln.Leave = dict.Basic[piv.Leave]
soln.Dict = dict.Pivot(piv.Enter, piv.Leave)
}
}
if refFile != "" {
// Load reference output.
var ref Summary
if err := Load(ReadSummaryFrom, refFile, &ref); err != nil {
log.Fatalln("could not load reference summary:", err)
}
// Compare.
ok := check(soln, ref)
if !ok {
log.Fatal("fail")
}
log.Print("pass")
}
if outFile != "" {
// Save dictionary out.
if err := Save(WriteSolutionTo, outFile, soln); err != nil {
log.Fatalln("could not save solution")
}
}
}