Struct{...}

#include <iostream>
#include <iomanip>
using namespace std;
struct school {
    string city,surname,name,patronymic;
    int numbers,russianl,mathem,physics;
    school(){};
    void input();
    bool best();
};
 
void school::input(){
    cout<<"Enter city : ";
    cin>>city;
    cout<<"Enter surname name patronymic : ";
    cin>>surname>>name>>patronymic;
    cout<<"Enter number of schools : ";
    cin>>numbers;
    cout<<"Enter mark on Russian language : ";
    cin>>russianl;
    cout<<setw(33)<<"on mathematics : ";
    cin>>mathem;
    cout<<setw(33)<<"on physics : ";
    cin>>physics;
    }
bool school::best() {
    if(russianl==5 && mathem==5 && physics==5)
       return true;
    return false;
}        
            
int main () {
    school ob[30]; // 30 учеников максимум
    char n=0;
    for(int i=0;i<30;i++){  
        cout<<"Do you want to enter some information about schooler ? (y\\n) : ";
        cin>>n;
        if(n=='n'||n=='N') break;
        ob[i].input();
    } 
    cout<<"Do you want to see list of excellent pupil ? (y\\n) : "; 
    cin>>n;
    if(n=='y'||n=='Y'){
        int f=0;
        for(int i=0;i<30;i++){
           if(ob[i].best()){
              ++f; 
              cout<<ob[i].surname<<" "\
                  <<ob[i].name<<" "\
                  <<ob[i].patronymic<<" is excellent pupil!"<<endl;}
           if (i==29 && f==0) 
              cout<<"No excellent pupil!"<<endl;
              }
    }       
    cout<<"Goodbye!"<<endl;                             
    system ("pause");
    return 0;
              }