题解 | #实现四舍五入#

#include <iostream>
using namespace std;

int main()
{
    float a;
    cin>>a;
    if(a>0)
    {
        if((a-(int)a<0.5))
        {
            cout<<(int)a<<endl;
        }
        else
        {
            int b=(int)a+1;
            cout<<b<<endl;
        }
        return 0;
    }
    else
    {
        if((a-(int)a>-0.5))
        {
            cout<<(int)a<<endl;
        }
        else
        {
            int b=(int)a-1;
            cout<<b<<endl;
        }
        return 0;
    }
    
}