n的阶乘之和-golang实现

题目

对于一个数n，求n的阶乘之和，即： 1！ + 2！ + 3！+…n!

代码

package main

import (
    "fmt"
)

func sum(n int) uint64 {
    var s uint64 = 1
    var sum uint64 = 0
    // 3! = 2！* 1
    for i := 1; i <= n; i++ {< span>        s = s * uint64(i)        fmt.Printf("%d!=%v\n", i, s)        sum += s    }    return sum}func main() {    var n int        fmt.Scanf("%d", &n)    s := sum(n)    fmt.Println(s)}
        s = s * uint64(i)
        fmt.Printf("%d!=%v\n", i, s)
        sum += s
    }
    return sum
}

func main() {
    var n int
    
    fmt.Scanf("%d", &n)
    s := sum(n)
    fmt.Println(s)
}