go语言——随机数

// +build ignore

package main

import (
	"fmt"
	"math/rand"
	"time"
)


func main() {
    
	num1 := rand.Int()
	fmt.Println(num1)

	for i := 1; i < 10; i++ {
		num := rand.Intn(10)
		fmt.Print(num,"\t")
	}
	fmt.Println()

	rand.Seed(100)
	num2 := rand.Intn(10)
	fmt.Println(num2)

	t1 := time.Now()
	fmt.Println(t1)
	//时间戳，1970.1.1
	t2 := t1.Unix()
	fmt.Println(t2)

	t3 := t1.UnixNano  //纳秒
	fmt.Println(t3)

    //引入时间戳作为种子，防止每次运行生成的数字一样
	rand.Seed(time.Now().UnixNano())
	for i := 1; i < 10; i++ {
		num := rand.Intn(10)
		fmt.Print(num,"\t")
	}


}