Go Linux bash环境下 字符串strings.Trim截取无效

    result := "40%"
    if len(result) > 0 {
        fmt.Println("result:", result)
        numStr := strings.TrimSpace(strings.Trim(result, "%"))
        fmt.Println("numStr:", numStr)
        numFloat, err := strconv.ParseFloat(numStr, 4)
        if err != nil {
            fmt.Printf("strconv.ParseFloat Error:%v", err)
        }
        fmt.Println("float num:", numFloat)
    }

Linux 下报错 strconv.ParseFloat Error:strconv.ParseFloat: parsing "40%": invalid syntaxfloat num: 0

仔细查看输出：要去掉的%没有去除成功

result: 33%

numStr: 33%
strconv.ParseFloat Error:strconv.ParseFloat: parsing "33%": invalid syntaxfloat num: 0

测试解决方法： 字符串后面加一个换行符\n 解决

numStr := strings.TrimSpace(strings.Trim(result, "%\n"))

package main

import (
    "fmt"
    "os/exec"
    "strconv"
    "strings"
)

func main() {
    arg := "fping -C10 -p100  -b32 -t3000  -i100 8.8.8.8 | tail -n 1 | awk '{print $10}'"
    //arg := "fping -C10  -p100  -b32 -t3000  -i100 114.114.114.114 | tail -n 1 | awk '{print $10}'"
    // bash -c "fping -C10  -p100  -b32 -t3000  -i100 114.114.114.114 | tail -n 1 | awk '{print $10}
    //cmd := exec.Command("/bin/sh", "-c", arg)

    cmd := exec.Command("/bin/bash", "-c", arg)
    out, err := cmd.Output()
    if err != nil {
        fmt.Println(err)
    }
    result := string(out)
    if len(result) > 0 {
        fmt.Println("result:",result)
        numStr := strings.TrimSpace(strings.Trim(result,"%\n"))
        fmt.Println("numStr:",numStr)
        numFloat, err := strconv.ParseFloat(numStr, 4)
        if err != nil {
            fmt.Printf("strconv.ParseFloat Error:%v", err)
        }
        fmt.Println("float num:", numFloat)
    }
}