首次提交：初始化项目代码

time/time_demo_5.go

@@ -0,0 +1,30 @@
+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)
+}