题解 | 小乐乐求和递归题解
小乐乐求和
https://www.nowcoder.com/practice/ce0b2eacd3d04647831358c2876e44ff
#include <iostream>
using namespace std;
long sum(long n){
if (n == 1)
return 1;
else
return n + sum(n-1);
};
int main() {
long n;
scanf("%ld", &n);
printf("%ld",sum(n));
}