英文:
How to calculate a random number in Go?
问题
以下是翻译好的内容：
package main
import "fmt"
import "math/rand"
func main() {
var milesdriven float64
var enginerunningloud bool = true
var changeoil bool = true
if milesdriven >= 3000.0 || enginerunningloud == false {
float64 := (milesdriven * Rand)
changeoil = true
fmt.Println("Change that oil duuuuuude")
}
}
这是我目前的代码，但我一直收到"imported and not used "math/rand""的错误提示，还有一个未定义的Rand是什么意思？我该怎么办？
英文:
package main
import "fmt"
import "math/rand"
func main() {
var milesdriven float64
var enginerunningloud bool = true
var changeoil bool = true
if milesdriven >= 3000.0 || enginerunningloud == false {
float64 := (milesdriven * Rand)
changeoil = true
fmt.Println("Change that oil duuuuuude")
}
}
This is what I have so far but I keep getting imported and not used "math/rand" and also a undefined Rand what does that mean? And what should I do?
答案1
得分: 2
请参考math/rand包的文档以了解如何生成随机数。例如：
package main
import "math/rand"
import "time"
func main() {
seed := time.Now().UnixNano()
random := rand.New(rand.NewSource(seed))
println(random.Float64()) // => +8.277637e-001
println(random.Int()) // => 7112143871403206581
// etc.
}
英文:
See the math/rand package documentation for how to generate random numbers. e.g.:
package main
import "math/rand"
import "time"
func main() {
seed := time.Now().UnixNano()
random := rand.New(rand.NewSource(seed))
println(random.Float64()) // => +8.277637e-001
println(random.Int()) // => 7112143871403206581
// etc.
}
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