Rounding the decimal point

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#include<bits/stdc++.h>
#define IOS ios::sync_with_stdio(false),cin.tie(0);
using namespace std;
#define MAXN 10010
double a[MAXN],n,pass,exc;
double res_pass,res_exc;

int main()
{
    
    
    IOS;
    cin>>n;
    for(int i=0;i<n;i++){
    
    
        cin>>a[i];
        if(a[i]>=60)pass++;
        if(a[i]>=85)exc++;
    }
    res_pass=pass/n*100;res_pass=floor(res_pass+0.5);
    res_exc=exc/n*100;res_exc=floor(res_exc+0.5);
    return cout<<res_pass<<"%"<<"\n"<<res_exc<<"%"<<endl,0;
}

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#include<bits/stdc++.h>
#define IOS ios::sync_with_stdio(false),cin.tie(0);
using namespace std;
#define MAXN 10010
int a[MAXN],n,max_num=-999,min_num=999;
double sum;

int main()
{
    
    
    cin>>n;
    for(int i=0;i<n;i++){
    
    
        cin>>a[i];sum+=a[i];
        max_num=max(a[i],max_num);
        min_num=min(a[i],min_num);
    }
    cout<<max_num<<"\n"<<min_num<<endl;
    return cout<<fixed<<setprecision(2)<<sum/n<<endl,0;
}