#include<bits/stdc++.h>
using namespace std;
int main(){
    double a=0,b=0;
    a=a+97+98+83;
    b=a/3;
    cout<<a<<endl;
    printf("%.1lf",b);
    return 0;
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main()
{
        float a,b,c,s=0;
        a=97;b=98;c=83;
        s=a+b+c;
        cout<<s<<endl;
        cout<<fixed<<setprecision(1)<<s/3;
}