题解 | #实现四舍五入#

#include <iostream>
using namespace std;

int main() {
    float number;
    cin>>number;
    if(number>=0)
      {if((number-(int)number)*10>=5)
       {
        cout<<(int)number+1;
       }
       else
       {
        cout<<(int)number;
       }
      }
    else 
    {
    if((-(number-(int)number)*10)>=5)
    {
        cout<<(int)number-1;
    }
    else 
    {
        cout<<(int)number;
    }
    
    }
}