mirror of
https://github.com/golang/go
synced 2024-11-18 04:24:47 -07:00
27 lines
609 B
Go
27 lines
609 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2012 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
// Converting constants between types must introduce rounding.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
const (
|
||
|
|
F32 = 0.00999999977648258209228515625
|
||
|
|
F64 = 0.01000000000000000020816681711721685132943093776702880859375
|
||
|
|
)
|
||
|
|
|
||
|
|
var F = float64(float32(0.01))
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
// 0.01 rounded to float32 then to float64 is F32.
|
||
|
|
// 0.01 represented directly in float64 is F64.
|
||
|
|
if F != F32 {
|
||
|
|
panic(fmt.Sprintf("F=%.1000g, want %.1000g", F, F32))
|
||
|
|
}
|
||
|
|
}
|