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【JZ64 求1+2+3+...+n】
2022-07-30 10:37:00 【爱吃榴莲的喵星人】
一、题目描述
二、题目代码
提示:内部类实现
class Solution {
private:
class Sum
{
public:
Sum()
{
_ret += _i;
_i++;
}
};
static int _ret;
static int _i;
public:
int Sum_Solution(int n) {
Sum arr[n];
return _ret;
}
};
int Solution::_ret = 0;
int Solution::_i = 1;
class Sum
{
public:
Sum()
{
_ret += _i;
_i++;
}
static int get_ret()
{
return _ret;
}
private:
static int _ret;
static int _i;
};
int Sum::_ret = 0;
int Sum::_i = 1;
class Solution {
public:
int Sum_Solution(int n) {
Sum arr[n];
return Sum::get_ret();
}
};
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