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math/big: use more direct formatting in ExampleRoundingMode, cosmetic changes

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Change-Id: I3d37391af2089881a5bd4d8f3e5d434b279c272e
Reviewed-on: https://go-review.googlesource.com/14490
Reviewed-by: Chris Manghane <cmang@golang.org>
This commit is contained in:
Robert Griesemer 2015-09-10 13:06:46 -07:00
parent 3ed6e830b9
commit a370fbaac6
1 changed files with 10 additions and 11 deletions
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21
src/math/big/floatexample_test.go
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@ -113,9 +113,9 @@ func ExampleFloat_Cmp() {
func ExampleRoundingMode() {
operands := []float64{2.6, 2.5, 2.1, -2.1, -2.5, -2.6}
fmt.Printf("x ")
fmt.Print(" x")
for mode := big.ToNearestEven; mode <= big.ToPositiveInf; mode++ {
fmt.Printf(" %s", mode)
fmt.Printf(" %s", mode)
}
fmt.Println()
@ -125,18 +125,17 @@ func ExampleRoundingMode() {
// sample operands above require 2 bits to represent mantissa
// set binary precision to 2 to round them to integer values
f := new(big.Float).SetPrec(2).SetMode(mode).SetFloat64(f64)
format := fmt.Sprintf(" %%%dg", len(mode.String()))
fmt.Printf(format, f)
fmt.Printf(" %*g", len(mode.String()), f)
}
fmt.Println()
}
// Output:
// x ToNearestEven ToNearestAway ToZero AwayFromZero ToNegativeInf ToPositiveInf
// 2.6 3 3 2 3 2 3
// 2.5 2 3 2 3 2 3
// 2.1 2 2 2 3 2 3
// -2.1 -2 -2 -2 -3 -3 -2
// -2.5 -2 -3 -2 -3 -3 -2
// -2.6 -3 -3 -2 -3 -3 -2
// x ToNearestEven ToNearestAway ToZero AwayFromZero ToNegativeInf ToPositiveInf
// 2.6 3 3 2 3 2 3
// 2.5 2 3 2 3 2 3
// 2.1 2 2 2 3 2 3
// -2.1 -2 -2 -2 -3 -3 -2
// -2.5 -2 -3 -2 -3 -3 -2
// -2.6 -3 -3 -2 -3 -3 -2
}