ssss

#include <iostream>
#include <iomanip>
using namespace std;
class sv{
    string ten,xl;
    float dt,dv,dtb;
    public:
    sv(string ten,float dv,float dt) {
        this->ten=ten;
        this->dv=dv;
        this->dt=dt;
    };
    string getName(){
        return ten;
    }
    float getToan(){
        return dt;
    }
    float getVan(){
        return dv;
    }
    sv(sv & sv1){
        this->ten=sv1.ten;
        this->dv=sv1.dv;
        this->dt=sv1.dt;
        this->xl=sv1.xl;
        this->dtb=sv1.dtb;
    }
    ~sv(){
        delete this;
    }

    void nhap(){
        cin>>this->ten;
        cin>>this->dt;
        cin>>this->dv;
    }
    void setName(string ten){
        this->ten = ten;
    }
    void setToan(float dt){
        this->dt=dt;
    }
    void setVan(float dv){
        this->dv=dv;
    }

    float setDTB(){
        this->dtb=(dv+dt)/2;
        return this->dtb;
    }

    string setXL(){
        if(setDTB()>=8) xl= "Gioi";
        else if(setDTB()>=7) xl= "Kha";
        else if(setDTB()>=5) xl= "Trung binh";
        else xl= "Yeu";    
        return xl;
    }
    void xuat(){
        setXL();
        cout<<setw(20)<<ten<<setw(20)<<dv<<setw(20)<<dt<<setw(20)<<dtb<<setw(20)<<xl<<endl;
    }
};
int main(){
    sv sv1("Le Van Tu",9,10);
    sv1.setToan(9.5);
    sv1.xuat();
}