题解 | #求1+2+3+...+n#
求1+2+3+...+n
http://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1
public class Solution {
public int Sum_Solution(int n) {
boolean flag = (n > 0) && (n += Sum_Solution(n - 1)) > 0;
return n;
}
}
查看13道真题和解析