package main

import (
	"fmt"
	"time"
)

func main() {
	base := time.Date(2026, 6, 3, 18, 30, 45, 0, time.UTC)

	// 加减
	oneDayLater := base.Add(24 * time.Hour)
	oneHourBefore := base.Add(-time.Hour)

	// 输出使用变量，解决未使用报错
	fmt.Println("基准时间:", base)
	fmt.Println("加一天后:", oneDayLater)
	fmt.Println("减一小时后:", oneHourBefore)

	// 差值
	diff := oneDayLater.Sub(base)
	fmt.Println("时间差:", diff)

	// 截断 & 舍入
	trunc := base.Truncate(time.Hour)
	round := base.Round(time.Minute)

	fmt.Println("截断到小时:", trunc)
	fmt.Println("四舍五入到分钟:", round)
}