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