题解 | #实现四舍五入#

#include <cstdio>
#include <iostream>
using namespace std;

int main()
{
    double d;
    int a;
    cin >> d;
    a = d;
    if (d-a >= 0.5)
        cout << a + 1;
    else if (d-a <= -0.5 )
        cout << a-1; 

    else
        cout << a;    
}