57 lines
1.0 KiB
Go
57 lines
1.0 KiB
Go
package income
|
|
|
|
import (
|
|
"math"
|
|
"math/big"
|
|
)
|
|
|
|
// Div div
|
|
func Div(x, y float64) float64 {
|
|
a := big.NewFloat(x)
|
|
b := big.NewFloat(y)
|
|
c := new(big.Float).Quo(a, b)
|
|
d, _ := c.Float64()
|
|
return d
|
|
}
|
|
|
|
// Mul mul
|
|
func Mul(x, y float64) float64 {
|
|
a := big.NewFloat(x)
|
|
b := big.NewFloat(y)
|
|
c := new(big.Float).Mul(a, b)
|
|
d, _ := c.Float64()
|
|
return d
|
|
}
|
|
|
|
// DivWithRound div with round
|
|
func DivWithRound(x, y float64, places int) float64 {
|
|
a := big.NewFloat(x)
|
|
b := big.NewFloat(y)
|
|
c := new(big.Float).Quo(a, b)
|
|
d, _ := c.Float64()
|
|
return Round(d, places)
|
|
}
|
|
|
|
// MulWithRound mul with round
|
|
func MulWithRound(x, y float64, places int) float64 {
|
|
a := big.NewFloat(x)
|
|
b := big.NewFloat(y)
|
|
c := new(big.Float).Mul(a, b)
|
|
d, _ := c.Float64()
|
|
return Round(d, places)
|
|
}
|
|
|
|
// Round round
|
|
func Round(val float64, places int) float64 {
|
|
var round float64
|
|
pow := math.Pow(10, float64(places))
|
|
digit := pow * val
|
|
_, div := math.Modf(digit)
|
|
if div >= 0.5 {
|
|
round = math.Ceil(digit)
|
|
} else {
|
|
round = math.Floor(digit)
|
|
}
|
|
return round / pow
|
|
}
|