Golang Sqrt Examples

Example #1

File: calc.go Project: yuedun/go-test

func main() {
	args := os.Args
	if args == nil || len(args) < 2 {
		Usge()
		return
	}
	switch args[1] {
	case "add":
		if len(args) != 4 {
			fmt.Println("USAGE1：calc add <integer1><integer2>")
		}
		v1, err1 := strconv.Atoi(args[2])
		v2, err2 := strconv.Atoi(args[3])
		if err1 != nil || err2 != nil {
			fmt.Println("USAGE2：calc add <integer1><integer2>", err1)
			return
		}
		ret := simplemath.Add(v1, v2)
		fmt.Println("Result1:", ret)
	case "sqrt":
		if len(args) != 3 {
			fmt.Println("USAGE3：calc sqrt <integer>")
			return
		}
		v, err := strconv.Atoi(args[2])
		if err != nil {
			fmt.Println("USAGE4：calc sqrt <integer>")
			return
		}
		ret := simplemath.Sqrt(v)
		fmt.Println("Result2:", ret)
	default:
		Usge()
	}
}

Example #2

File: calc.go Project: JiYou/gosamples

func main() {
	var args = os.Args
	if nil == args || len(args) <= 2 {
		fmt.Println("Arguments to less!")
		Usage()
		os.Exit(0)
	}

	switch args[1] {
	case "add":
		if 4 != len(args) {
			fmt.Println("USAGE: calc add integer integer")
			Usage()
			os.Exit(0)
		}

		a, err1 := strconv.Atoi(args[2])
		b, err2 := strconv.Atoi(args[3])
		if nil != err1 || nil != err2 {
			fmt.Println("Can not convert string to integer!")
			Usage()
			os.Exit(0)
		}

		ret := simplemath.Add(a, b)
		fmt.Println(a, "+", b, " = ", ret)
	case "sqrt":
		if 3 != len(args) {
			fmt.Println("USAGE: calc sqrt integer")
			Usage()
			os.Exit(0)
		}

		a, err := strconv.Atoi(args[2])
		if nil != err {
			fmt.Println("Can not convert string to integer!")
			Usage()
			os.Exit(0)
		}

		ret, err := simplemath.Sqrt(a)
		if nil != err {
			fmt.Println("Can not use ", a, " in sqrt function!")
			Usage()
			os.Exit(0)
		}

		fmt.Println("Sqrt(", a, ") = ", ret)
	default:
		Usage()
	}
}

Example #3

File: calc.go Project: MasteringGolang/LearningProjectManagement

func main() {

	args := os.Args
	if args == nil || len(args) < 2 {

		Usage()
		return
	}

	switch args[0] {

	case "add":
		if len(args) != 3 {
			showAddUsage()
			return
		}
		//strconv.Atoi: change str into integer
		v1, err1 := strconv.Atoi(args[1])
		v2, err2 := strconv.Atoi(args[2])

		if err1 != nil || err2 != nil {
			showAddUsage()
			return
		}
		ret := simplemath.Add(v1, v2)

		fmt.Println("Result: ", ret)

	case "sqrt":
		if len(args) != 2 {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		v, err := strconv.Atoi(args[1])
		if err != nil {
			showSqrtUsage()
			return
		}
		ret := simplemath.Sqrt(v)
		fmt.Println("Result: ", ret)

	default:
		Usage()
	}

}

Example #4

File: calc.go Project: johnson7788/Hello-world

func main() {
	args := os.Args[1:]
	if args == nil || len(args) < 2 {
		Usage()
		return
	}

	//fmt.Println("args 0 is:", args[0], args[1], args[2])
	//fmt.Println("length is:", len(args))
	/*for i,v := range args {
	  	fmt.Println(i," ", v)
	  }
	*/
	switch args[0] {
	case "add":
		if len(args) != 3 {
			fmt.Println("USAGE1: calc add <integer1><integer2>")
			return
		}
		v1, err1 := strconv.Atoi(args[1])
		v2, err2 := strconv.Atoi(args[2])
		if err1 != nil || err2 != nil {
			fmt.Println("USAGE2: calc add <integer1><integer2>")
			return
		}
		ret := simplemath.Add(v1, v2)
		fmt.Println("Result: ", ret)
	case "sqrt":
		if len(args) != 2 {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		v, err := strconv.Atoi(args[1])
		if err != nil {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		ret := simplemath.Sqrt(v)
		fmt.Println("Result: ", ret)
	default:
		Usage()
		fmt.Println("why me")
	}
}

Example #5

File: calc.go Project: yumm007/Go

func main() {
	args := os.Args
	if args == nil || len(args) < 3 {
		Usage()
		return
	}

	switch args[1] {
	case "add":
		if len(args) != 4 {
			fmt.Println("Usage: cale add <integer1> <integer2>")
			return
		}

		v1, err1 := strconv.Atoi(args[2])
		v2, err2 := strconv.Atoi(args[3])
		if err1 != nil || err2 != nil {
			fmt.Println("Usage: cale add <integer1> <integer2>")
			return
		}

		ret := simplemath.Add(v1, v2)
		fmt.Println("Result: ", ret)
	case "sqrt":
		if len(args) != 3 {
			fmt.Println("Usage: calc sqrt <integer>")
			return
		}

		v, err := strconv.Atoi(args[2])
		if err != nil {
			fmt.Println("Usage: calc sqrt <integer>")
			return
		}

		ret := simplemath.Sqrt(v)
		fmt.Println("Result: ", ret)
	default:
		fmt.Println("unknown command ", args[1])
		Usage()
	}
}

Example #6

File: calc.go Project: TLARP/research

func main() {
	args := os.Args
	if args == nil || len(args) < 2 {
		Usage()
		return
	}

	fmt.Println("%s\n", args)

	switch args[1] {
	case "add":
		if len(args) != 4 {
			ErrAdd()
			return
		}
		v1, err1 := strconv.Atoi(args[2])
		v2, err2 := strconv.Atoi(args[3])

		if err1 != nil || err2 != nil {
			ErrAdd()
			return
		}
		ret := simplemath.Add(v1, v2)
		fmt.Println("result: %d ", ret)
	case "sqrt":
		if len(args) != 3 {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		v, err := strconv.Atoi(args[2])

		if err != nil {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		ret := simplemath.Sqrt(v)
		fmt.Println("Result: %d ", ret)
	default:
		Usage()
	}
}

Example #7

File: calc.go Project: javasgl/learnGo

func main() {
	for i, v := range os.Args {
		fmt.Printf("%d:\t%s\n", i, v)
	}
	args := os.Args[1:]
	if args == nil || len(args) < 2 {
		Usage()
		return
	}
	switch args[0] {
	case "add":
		if len(args) != 3 {
			fmt.Println("Usage calc add <integer><interger2>")
			return
		}
		v1, err1 := strconv.Atoi(args[1])
		v2, err2 := strconv.Atoi(args[2])
		if err1 != nil || err2 != nil {
			fmt.Println("Usage calc add <integer><interger2>")
			return
		}
		ret := simplemath.Add(v1, v2)
		fmt.Println("Result: ", ret)
	case "sqrt":
		if len(args) != 2 {
			fmt.Println("Usage calc sqrt <integer>")
			return
		}
		v, err := strconv.Atoi(args[1])
		if err != nil {
			fmt.Println("Usage calc sqrt <integer>")
			return
		}
		ret := simplemath.Sqrt(v)
		fmt.Println("ResultL: ", ret)
	default:
		Usage()
	}
}

Example #8

func main() {
	flag.Parse()
	args := flag.Args()
	if args == nil || len(args) < 2 {
		Usage()
		return
	}

	switch args[0] {
	case "add":
		if len(args) != 3 {
			fmt.Println("USAGE: calc add <integer1> <integer2>")
			return
		}
		v1, err1 := strconv.Atoi(args[1])
		v2, err2 := strconv.Atoi(args[2])
		if err1 != nil || err2 != nil {
			fmt.Println("USAGE: calc add <integer1> <integer2>")
			return
		}
		ret := simplemath.Add(v1, v2)
		fmt.Println("Result: ", ret)
	case "sqrt":
		if len(args) != 2 {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		v, err := strconv.Atoi(args[1])
		if err != nil {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		ret := simplemath.Sqrt(v)
		fmt.Println("Result: ", ret)
	default:
		Usage()
	}
}

Example #9

File: calc.go Project: golwei/gotest

func main() {
	args := os.Args
	//	fmt.Println(len(args))
	if args == nil || len(args) < 2 {
		Usage()
		return
	}
	switch args[1] {
	case "add":
		if len(args) != 4 {
			fmt.Println("Usage:add 3 8")
			return
		}

		v1, err1 := strconv.Atoi(args[2])
		v2, err2 := strconv.Atoi(args[3])
		if err1 != nil || err2 != nil {
			fmt.Println("USAGE:add 3 4")
			return
		}
		ret := simplemath.Add(v1, v2)
		fmt.Println("Result:", ret)
	case "sqrt":
		if len(args) != 3 {
			fmt.Println("sqrt 3-->")
		}
		v, err := strconv.Atoi(args[2])
		if err != nil {
			fmt.Println("这样输入:sqrt 3.")
			return
		}
		ret := simplemath.Sqrt(v)
		fmt.Println(ret)
	default:
		fmt.Println("default")
	}

}

Example #10

File: calc.go Project: yangchengjian/program

func main() {
	args := os.Args
	if args == nil || len(args) < 2 {
		Usage()
		return
	}

	switch args[1] {
	case "add":
		if len(args) != 4 {
			fmt.Println("USAGE: calc add <integer1><integer2>")
			return
		}
		v1, err1 := strconv.Atoi(args[2])
		v2, err2 := strconv.Atoi(args[3])
		if err1 != nil || err2 != nil {
			fmt.Println("USAGE: calc add <integer1><integer2>")
			return
		}
		ret := simplemath.Add(v1, v2)
		fmt.Println("Result: ", ret)
	case "sqrt":
		if len(args) != 3 {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		v, err := strconv.Atoi(args[2])
		if err != nil {
			fmt.Println("USAGE: calc sqrt <integer>")
			return
		}
		ret := simplemath.Sqrt(v)
		fmt.Println("Result: ", ret)
	default:
		Usage()
		//fmt.Printf("len(args): %d, args[0] : %s , args[1]: %s, args[2]: %d, args[3]: %d",len(args), args[0], args[1], args[2], args[3])
	}
}