题解 | #小乐乐计算求和#
小乐乐计算求和
http://www.nowcoder.com/practice/c98aeab2362c459dbc840d4c75f07729
#include <stdio.h>
int jie(int n)
{
int jie = 1,sum = 0;
for(int i = 1;i<=n;++i)
{
jie*=i;
sum+=jie;
}return sum;
}
int main()
{
int n = 0;
scanf("%d",&n);
int sum = jie(n);
printf("%d\n",sum);
return 0;
}
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