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？
import (
"bufio"
"fmt"
"net"
"os"
)
func checkerror(err error) {
if err != nil {
fmt.Println("Error:", err)
}
}
func main() {
typeofoperation := bufio.NewScanner(os.Stdin)
typeofoperation.Scan()
typeofoperation.Text()
addr := bufio.NewScanner(os.Stdin)
addr.Scan()
addr.Text()
if typeofoperation.Text() == "tcp" {
address, err := net.ResolveTCPAddr("tcp", addr.Text())
checkerror(err)
conn, err1 := net.DialTCP("tcp", nil, address)
checkerror(err1)
fmt.Println(conn, "TCP end")
} else if typeofoperation.Text() == "ip" {
address, err := net.ResolveIPAddr("ip", addr.Text())
checkerror(err)
conn, err1 := net.DialIP("ip", nil, address)
checkerror(err1)
fmt.Println(conn, "IP end")
}
fmt.Println("End")
}
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?
import (
"bufio"
"fmt"
"net"
"os"
)
func checkerror(err error) {
if err != nil {
fmt.Println("Error:=", err)
}
}
func main() {
typeofoperation := bufio.NewScanner(os.Stdin)
typeofoperation.Scan()
typeofoperation.Text()
//fmt.Println("IP or TCP dial?")
//fmt.Println("Input Address")
//fmt.Scanf("%s", &typeofoperation)
//fmt.Scanf("%s", &addr)
addr := bufio.NewScanner(os.Stdin)
addr.Scan()
addr.Text()
if typeofoperation == "tcp" {
address, err := net.ResolveTCPAddr("tcp", addr)
checkerror(err)
conn, err1 := net.DialTCP("tcp", nil, address)
checkerror(err1)
fmt.Println(conn, "TCP end")
} else if typeofoperation == "ip" {
address, err := net.ResolveIPAddr("ip", addr)
checkerror(err)
conn, err1 := net.DialIP("ip", nil, address)
checkerror(err1)
fmt.Println(conn, "IP end")
}
fmt.Println("End")
}
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。
typeofoperation_input := typeofoperation.Text()
add_input := addr.Text()
if typeofoperation_input == "tcp" {
}
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.
typeofoperation_input := typeofoperation.Text()
add_input := addr.Text()
if typeofoperation_input == "tcp" {
}
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