Golang指针操作字符串方法详解

func printString(s *string) {
    println(*s)
}

func main() {
    str := "hello"
    printString(&str) // 传递字符串地址
}

func modifyString(s *string) {
    bytes := []byte(*s)
    for i := range bytes {
        if bytes[i] == 'o' {
            bytes[i] = '0'
        }
    }
    *s = string(bytes) // 将结果写回原字符串
}

func main() {
    str := "hello"
    modifyString(&str)
    println(str) // 输出：hell0
}

func safePrint(s *string) {
    if s != nil {
        println(*s)
    } else {
        println("string is nil")
    }
}

func main() {
    var p *string
    safePrint(p) // 输出：string is nil

    str := "world"
    p = &str
    safePrint(p) // 输出：world
}

func main() {
    s1, s2 := "a", "b"
    ptrs := []*string{&s1, &s2}

    for _, p := range ptrs {
        println(*p)
    }
}