| package inf_test |
| |
| import ( |
| "fmt" |
| "os" |
| "text/tabwriter" |
| |
| "gopkg.in/inf.v0" |
| ) |
| |
| // This example displays the results of Dec.Round with each of the Rounders. |
| // |
| func ExampleRounder() { |
| var vals = []struct { |
| x string |
| s inf.Scale |
| }{ |
| {"-0.18", 1}, {"-0.15", 1}, {"-0.12", 1}, {"-0.10", 1}, |
| {"-0.08", 1}, {"-0.05", 1}, {"-0.02", 1}, {"0.00", 1}, |
| {"0.02", 1}, {"0.05", 1}, {"0.08", 1}, {"0.10", 1}, |
| {"0.12", 1}, {"0.15", 1}, {"0.18", 1}, |
| } |
| |
| var rounders = []struct { |
| name string |
| rounder inf.Rounder |
| }{ |
| {"RoundDown", inf.RoundDown}, {"RoundUp", inf.RoundUp}, |
| {"RoundCeil", inf.RoundCeil}, {"RoundFloor", inf.RoundFloor}, |
| {"RoundHalfDown", inf.RoundHalfDown}, {"RoundHalfUp", inf.RoundHalfUp}, |
| {"RoundHalfEven", inf.RoundHalfEven}, {"RoundExact", inf.RoundExact}, |
| } |
| |
| fmt.Println("The results of new(inf.Dec).Round(x, s, inf.RoundXXX):") |
| fmt.Println() |
| w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', tabwriter.AlignRight) |
| fmt.Fprint(w, "x\ts\t|\t") |
| for _, r := range rounders { |
| fmt.Fprintf(w, "%s\t", r.name[5:]) |
| } |
| fmt.Fprintln(w) |
| for _, v := range vals { |
| fmt.Fprintf(w, "%s\t%d\t|\t", v.x, v.s) |
| for _, r := range rounders { |
| x, _ := new(inf.Dec).SetString(v.x) |
| z := new(inf.Dec).Round(x, v.s, r.rounder) |
| fmt.Fprintf(w, "%d\t", z) |
| } |
| fmt.Fprintln(w) |
| } |
| w.Flush() |
| |
| // Output: |
| // The results of new(inf.Dec).Round(x, s, inf.RoundXXX): |
| // |
| // x s | Down Up Ceil Floor HalfDown HalfUp HalfEven Exact |
| // -0.18 1 | -0.1 -0.2 -0.1 -0.2 -0.2 -0.2 -0.2 <nil> |
| // -0.15 1 | -0.1 -0.2 -0.1 -0.2 -0.1 -0.2 -0.2 <nil> |
| // -0.12 1 | -0.1 -0.2 -0.1 -0.2 -0.1 -0.1 -0.1 <nil> |
| // -0.10 1 | -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 |
| // -0.08 1 | 0.0 -0.1 0.0 -0.1 -0.1 -0.1 -0.1 <nil> |
| // -0.05 1 | 0.0 -0.1 0.0 -0.1 0.0 -0.1 0.0 <nil> |
| // -0.02 1 | 0.0 -0.1 0.0 -0.1 0.0 0.0 0.0 <nil> |
| // 0.00 1 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 |
| // 0.02 1 | 0.0 0.1 0.1 0.0 0.0 0.0 0.0 <nil> |
| // 0.05 1 | 0.0 0.1 0.1 0.0 0.0 0.1 0.0 <nil> |
| // 0.08 1 | 0.0 0.1 0.1 0.0 0.1 0.1 0.1 <nil> |
| // 0.10 1 | 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 |
| // 0.12 1 | 0.1 0.2 0.2 0.1 0.1 0.1 0.1 <nil> |
| // 0.15 1 | 0.1 0.2 0.2 0.1 0.1 0.2 0.2 <nil> |
| // 0.18 1 | 0.1 0.2 0.2 0.1 0.2 0.2 0.2 <nil> |
| |
| } |