题解 | #求1+2+3+...+n#
求1+2+3+...+n
https://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1
class A{
public:
A(){
++N;
sum+=N;
}
static void Reset(){
N=0;
sum=0;
}
static int N;
static int sum;
};
int A::N=0;
int A::sum=0;
class Solution {
public:
int Sum_Solution(int n) {
A::Reset();
A *a=new A[n];
delete []a;
a=nullptr;
return A::sum;
}
};
