class ConSum{
private:
static int n;
static int sum;
public：
ConSum(){++n;sum+n}
static int getSum(){return sum;}
};
? ?
int ConSum::n=0;
int ConSum::sum=0;
int sum_solution(int n){
ConSum *a=new ConSum[n];
return ConSum::getSum();
}
原文：http://www.cnblogs.com/keedor/p/4376514.html