package main

import (
    "fmt"
    "io/ioutil"
    "log"
    "net/http"

    "github.com/gin-gonic/gin"
)

// Phone asd
type Phone interface {
    call()
}

// MiPhone asd
type MiPhone struct {
}

go env -w GOPROXY=https://goproxy.cn,direct
go mod init api
go get -u github.com/gin-gonic/gin

package main

import (
    "fmt"

    "github.com/gin-gonic/gin"
)

func main() {

package main

import (
    "fmt"
    "github.com/gin-gonic/gin"
    "net/http"
)

type User struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {

    r := gin.Default()

| - src
    - index.go
    - libs
        - index.go

libs / index.go

package libs // 属于哪个包
//  方法名 首字母 大写才能导出
func Count( a int, b int ) int {
    return a + b
}

index.go