package math import ( "fmt" "strconv" ) // MustParsePrecFloat64 按小数位截取float func MustParsePrecFloat64(value float64, prec int) float64 { format := fmt.Sprintf("%%.%df", prec) v, err := strconv.ParseFloat(fmt.Sprintf(format, value), 64) if err != nil { return 0 } return v }