Go Example--格式化字符串

Posted 2021-01-15 promenader

package main

import (
    "fmt"
    "os"
)

type point struct {
    x, y int
}

func main() {
    p := point{1, 2}
    fmt.Printf("%v
", p)
    fmt.Printf("%+v
", p)
    fmt.Printf("%#v
", p)
    fmt.Printf("%T
", p)
    fmt.Printf("%t
", true)
    fmt.Printf("%d
", 123)
    fmt.Printf("%b
", 14)
    fmt.Printf("%c
", 33)
    fmt.Printf("%x
", 456)
    fmt.Printf("%f
", 78.9)
    fmt.Printf("%e
", 12340000.0)
    fmt.Printf("%E
", 12340000.0)
    fmt.Printf("%s
", ""string"")
    fmt.Printf("%q
", ""string"")
    fmt.Printf("%x
", "hex this")
    fmt.Printf("%p
", &p)
    fmt.Printf("|%6d|%6d|
", 12, 345)
    fmt.Printf("|%6.2f|%6.2f|
", 1.2, 3.45)
    fmt.Printf("|%-6.2f|%-6.2f|
", 1.2, 3.45)
    fmt.Printf("|%6s|%6s|
", "foo", "b")
    fmt.Printf("|%-6s|%-6s|
", "foo", "b")
    s := fmt.Sprintf("a %s", "string")
    fmt.Println(s)
    fmt.Fprintf(os.Stderr, "an %s
", "error")
}