Go 实现英尺和米的简单单位换算方式_Golang_

 package main import ( "fmt" "os" "strconv" ) type Feet float64 type Meter float64 func main() { var transType string = os.Args[2] var transferObject string = os.Args[1] parseObj, _ := strconv.ParseFloat(transferObject, 64) if transType == "feet" { // transfer to meter fmt.Println(toFeet(Meter(parseObj))) } else { fmt.Println(toMeter(Feet(parseObj))) } } func toMeter(feet Feet) Meter { return Meter(feet * 0.3048) } func toFeet(meter Meter) Feet { return Feet(meter * 1 / 0.3048) } // 保存后 go run test.go 1 feet 输出1米=多少英尺

 // 字节的单位转换 保留两位小数 func formatFileSize(fileSize int64) (size string) { if fileSize < 1024 { //return strconv.FormatInt(fileSize, 10) + "B" return fmt.Sprintf("%.2fB", float64(fileSize)/float64(1)) } else if fileSize < (1024 * 1024) { return fmt.Sprintf("%.2fKB", float64(fileSize)/float64(1024)) } else if fileSize < (1024 * 1024 * 1024) { return fmt.Sprintf("%.2fMB", float64(fileSize)/float64(1024*1024)) } else if fileSize < (1024 * 1024 * 1024 * 1024) { return fmt.Sprintf("%.2fGB", float64(fileSize)/float64(1024*1024*1024)) } else if fileSize < (1024 * 1024 * 1024 * 1024 * 1024) { return fmt.Sprintf("%.2fTB", float64(fileSize)/float64(1024*1024*1024*1024)) } else { //if fileSize < (1024 * 1024 * 1024 * 1024 * 1024 * 1024) return fmt.Sprintf("%.2fEB", float64(fileSize)/float64(1024*1024*1024*1024*1024)) } }