63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
|
package inf_test
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"log"
|
||
|
|
)
|
||
|
|
|
||
|
|
import "gopkg.in/inf.v0"
|
||
|
|
|
||
|
|
func ExampleDec_SetString() {
|
||
|
|
d := new(inf.Dec)
|
||
|
|
d.SetString("012345.67890") // decimal; leading 0 ignored; trailing 0 kept
|
||
|
|
fmt.Println(d)
|
||
|
|
// Output: 12345.67890
|
||
|
|
}
|
||
|
|
|
||
|
|
func ExampleDec_Scan() {
|
||
|
|
// The Scan function is rarely used directly;
|
||
|
|
// the fmt package recognizes it as an implementation of fmt.Scanner.
|
||
|
|
d := new(inf.Dec)
|
||
|
|
_, err := fmt.Sscan("184467440.73709551617", d)
|
||
|
|
if err != nil {
|
||
|
|
log.Println("error scanning value:", err)
|
||
|
|
} else {
|
||
|
|
fmt.Println(d)
|
||
|
|
}
|
||
|
|
// Output: 184467440.73709551617
|
||
|
|
}
|
||
|
|
|
||
|
|
func ExampleDec_QuoRound_scale2RoundDown() {
|
||
|
|
// 10 / 3 is an infinite decimal; it has no exact Dec representation
|
||
|
|
x, y := inf.NewDec(10, 0), inf.NewDec(3, 0)
|
||
|
|
// use 2 digits beyond the decimal point, round towards 0
|
||
|
|
z := new(inf.Dec).QuoRound(x, y, 2, inf.RoundDown)
|
||
|
|
fmt.Println(z)
|
||
|
|
// Output: 3.33
|
||
|
|
}
|
||
|
|
|
||
|
|
func ExampleDec_QuoRound_scale2RoundCeil() {
|
||
|
|
// -42 / 400 is an finite decimal with 3 digits beyond the decimal point
|
||
|
|
x, y := inf.NewDec(-42, 0), inf.NewDec(400, 0)
|
||
|
|
// use 2 digits beyond decimal point, round towards positive infinity
|
||
|
|
z := new(inf.Dec).QuoRound(x, y, 2, inf.RoundCeil)
|
||
|
|
fmt.Println(z)
|
||
|
|
// Output: -0.10
|
||
|
|
}
|
||
|
|
|
||
|
|
func ExampleDec_QuoExact_ok() {
|
||
|
|
// 1 / 25 is a finite decimal; it has exact Dec representation
|
||
|
|
x, y := inf.NewDec(1, 0), inf.NewDec(25, 0)
|
||
|
|
z := new(inf.Dec).QuoExact(x, y)
|
||
|
|
fmt.Println(z)
|
||
|
|
// Output: 0.04
|
||
|
|
}
|
||
|
|
|
||
|
|
func ExampleDec_QuoExact_fail() {
|
||
|
|
// 1 / 3 is an infinite decimal; it has no exact Dec representation
|
||
|
|
x, y := inf.NewDec(1, 0), inf.NewDec(3, 0)
|
||
|
|
z := new(inf.Dec).QuoExact(x, y)
|
||
|
|
fmt.Println(z)
|
||
|
|
// Output: <nil>
|
||
|
|
}
|