题解 | #实现四舍五入#

#include <iostream>
using namespace std;

int main() {

    double d;
    cin >> d;

    // write your code here......
    int a;
    a=(int)d;
    double b;
    b=d-a;
    if(b>=0.5){
        cout<<a+1<<endl;
    }else if(-0.5<b&&b<0.5){
        cout<<a<<endl;
    }
    else{
        cout<<a-1<<endl;
    }

    return 0;
}