Question

写一个python程序1!+2!+...+n!，n由用户输入

Answer 1

#include<stdio.h>
#include<math.h>
main(){
int n,i,j=0,s=0; scanf("%d",&n);
for(i=1;i<=n;i++) {
j=j+i; s=s+j;
}
printf("%d",s);
getch();
}

Answer 2

try:
     num=int(input())
except ValueError:
      print("输入有误，请输入正整数")

else:
    tmp = 1
    sum1 = 0
    c=int(num)
    if num==0:
         print("输入有误，请输入正整数")
    else:
         for i in range(1, c + 1):
            tmp = tmp * i
            sum1 = sum1 + tmp
         print("%d" % (sum1))