题解 | #求1+2+3+...+n#
求1+2+3+...+n
https://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1
class Solution {
public:
class sum
{
public:
sum()
{
_count += _i;
++_i;
}
};
int Sum_Solution(int n)
{
sum arr[n];
return _count;
}
private:
static int _i;
static int _count;
};
int Solution::_i = 1;
int Solution::_count = 0;
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