48 lines
998 B
Go
48 lines
998 B
Go
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package common
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import (
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"fmt"
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"strconv"
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"github.com/shopspring/decimal"
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)
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// FloatMul return a*b
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func FloatMul(a, b float64) float64 {
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aDec := decimal.NewFromFloat(a)
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bDec := decimal.NewFromFloat(b)
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ret, _ := aDec.Mul(bDec).Float64()
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return ret
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}
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// FloatAdd return a*b
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func FloatAdd(a, b float64) float64 {
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aDec := decimal.NewFromFloat(a)
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bDec := decimal.NewFromFloat(b)
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ret, _ := aDec.Add(bDec).Float64()
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return ret
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}
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// FloatSub return a-b
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func FloatSub(a, b float64) float64 {
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aDec := decimal.NewFromFloat(a)
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bDec := decimal.NewFromFloat(b)
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ret, _ := aDec.Sub(bDec).Float64()
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return ret
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}
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// FloatDiv return a/b
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func FloatDiv(a, b float64) float64 {
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aDec := decimal.NewFromFloat(a)
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bDec := decimal.NewFromFloat(b)
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ret, _ := aDec.Div(bDec).Float64()
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return ret
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}
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// FormatFloat format float with precision
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func FormatFloat(n float64, precision int) float64 {
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str := fmt.Sprintf("%df", precision)
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n2, _ := strconv.ParseFloat(fmt.Sprintf("%."+str, n), 64)
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return n2
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}
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