题解 | #实现四舍五入#

#include <iostream>
using namespace std;
int main() {
   double a;
   cin>>a;
   int b=a;
   if(a>0){
    if(a+0.5>=b+1){
        cout<<b+1;
    }
    else{
        cout<<b;
    }
   }
   else{
    if(a-0.5<=b-1){
        cout<<b-1;
    }
    else{
        cout<<b;
    }
   }
   return 0;
}