上下取整

头文件：#include <cmath>
double floor (double x); 向下取证
double ceil (double x); 向上取证 </cmath>

#include <cmath>
#include <iostream>

using namespace std;

int main()
{
    double num;
    cin >> num;
    int floor_num = floor(num);
    int ceil_num = ceil(num);
    cout << floor_num << endl;
    cout << ceil_num << endl;
    return 0;
}