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- 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>
-
- }
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