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