How to input ip address from keyboard in Go?

huangapple
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英文:

How to input ip address from keyboard in Go?

问题

我正在尝试在Go语言中从键盘输入IP地址。当我尝试使用bufio输入IP地址时，无法将"*bufio.Convert"类型转换为"string"类型。当我尝试使用Scanf()输入IP地址时，程序会跳过第二个变量的输入。如果我想将输入转换为字符串，我该怎么做？

  1. import (
  2. 	"bufio"
  3. 	"fmt"
  4. 	"net"
  5. 	"os"
  6. )
  8. func checkerror(err error) {
  9. 	if err != nil {
  10. 		fmt.Println("Error:", err)
  11. 	}
  12. }
  14. func main() {
  15. 	typeofoperation := bufio.NewScanner(os.Stdin)
  16. 	typeofoperation.Scan()
  17. 	typeofoperation.Text()
  19. 	addr := bufio.NewScanner(os.Stdin)
  20. 	addr.Scan()
  21. 	addr.Text()
  23. 	if typeofoperation.Text() == "tcp" {
  24. 		address, err := net.ResolveTCPAddr("tcp", addr.Text())
  25. 		checkerror(err)
  26. 		conn, err1 := net.DialTCP("tcp", nil, address)
  27. 		checkerror(err1)
  28. 		fmt.Println(conn, "TCP end")
  29. 	} else if typeofoperation.Text() == "ip" {
  30. 		address, err := net.ResolveIPAddr("ip", addr.Text())
  31. 		checkerror(err)
  32. 		conn, err1 := net.DialIP("ip", nil, address)
  33. 		checkerror(err1)
  34. 		fmt.Println(conn, "IP end")
  35. 	}
  37. 	fmt.Println("End")
  38. }

以上是你提供的代码的翻译。

英文:

Im trying to input IP address from keyboard in Go. When Im trying to input IP address using bufio i can`t convert "*bufio.Convert" type to "string" type. When Im trying to input ip address using Scanf() program skips input of second variable. What I must to do if i want to convert input to string?

  1. import (
  2.     "bufio"
  3.     "fmt"
  4.     "net"
  5.     "os"
  6. )
  8. func checkerror(err error) {
  9.    if err != nil {
  10. 	    fmt.Println("Error:=", err)
  11.    }
  12. }
  14. func main() {
  15.    typeofoperation := bufio.NewScanner(os.Stdin)
  16.    typeofoperation.Scan()
  17.    typeofoperation.Text()
  18.    //fmt.Println("IP or TCP dial?")
  19.    //fmt.Println("Input Address")
  20.    //fmt.Scanf("%s", &typeofoperation)
  21.    //fmt.Scanf("%s", &addr)
  22.    addr := bufio.NewScanner(os.Stdin)
  23.    addr.Scan()
  24.    addr.Text()
  25.       if typeofoperation == "tcp" {
  26.    	     address, err := net.ResolveTCPAddr("tcp", addr)
  27. 	     checkerror(err)
  28. 	     conn, err1 := net.DialTCP("tcp", nil, address)
  29. 	     checkerror(err1)
  30. 	     fmt.Println(conn, "TCP end")
  31.       } else if typeofoperation == "ip" {
  32. 	     address, err := net.ResolveIPAddr("ip", addr)
  33. 	     checkerror(err)
  34. 	     conn, err1 := net.DialIP("ip", nil, address)
  35. 	     checkerror(err1)
  36. 	     fmt.Println(conn, "IP end")
  37.    }
  38.       fmt.Println("End")
  39. }

答案1

得分: 1

问题在于你在这里使用的是Scanner的实例进行比较，而不是输入值。你应该将Text()返回的值存储在一个变量中，并将其用于比较。

  1. typeofoperation_input := typeofoperation.Text()
  2. add_input := addr.Text()
  4. if typeofoperation_input == "tcp" {
  5. }
英文:

The issue is that you're using Scanner's instance for comparison here not the input. You should store the value returned by Text() in a variable and use it for comparison.

  1. typeofoperation_input := typeofoperation.Text()
  2. add_input := addr.Text()
  4. if typeofoperation_input == "tcp" {
  5. }

huangapple
  • 本文由 发表于 2016年11月22日 20:19:46
  • 转载请务必保留本文链接：https://go.coder-hub.com/40741719.html
  • go
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