Calculater switch statement

AirAndVolume.cpp

#include "AirAndVolume.h"
#include <iostream>
using namespace std;


AirAndVolume::AirAndVolume()
{
    float CubeLO,CubeLA,CubeHA,CubeVolume,CubeAL,CubeAT,CubePDB,CubeADLB;
string CubeExit;
CubeStart:
    cout<<"Stats de un Rectangle ou cube\n "<<endl;
cout<<"    	 _________________________\n        / _____________________  /|\n       / / ___________________/ / |\n      / / /| |               / /  |\n     / / / | |              / / . |\n    / / /| | |             / / /| |\n   / / / | | |            / / / | |\n  / / /  | | |           / / /| | |\n / /_/__________________/ / / | | |\n/________________________/ /  | | |\n| ______________________ | |  | | |\n| | |    | | |_________| | |__| | |\n| | |    | |___________| | |____| |\n| | |   / / ___________| | |_  / /\n| | |  / / /           | | |/ / /\n| | | / / /            | | | / /\n| | |/ / /             | | |/ /\n| | | / /              | | ' /\n| | |/_/_______________| |  /\n| |____________________| | /\n|________________________|/\n";
    cout<<"Quelle est la Longeur de votre Rectangle?\n:";
    cin>>CubeLO;
    cout<<"Quelle est la Largeur de votre Rectangle?\n";
    cin>>CubeLA;
    cout<<"Quelle est la Hauteur de votre Rectangle?\n";
    cin>>CubeHA;
    CubeADLB = CubeLO * CubeLA;
    CubePDB = (CubeHA*2)+(CubeLA*2)+(CubeLO*2);
    CubeAL = CubePDB*CubeHA;
    CubeAT = CubeAL+2*CubeADLB;
    CubeVolume = CubeADLB*CubeHA;

    cout<<"\nVolume ------------------- " <<CubeVolume<<"\nAir Laterale ------------- "<<CubeAL<<"\nAir Totale --------------- "<<CubeAT<<"\nAire De La Base ---------- "<<CubeADLB<<"\nPreimetre de la base ----- "<<CubePDB<<endl;
    cout<<"\n\nVous voulez calculer de nouveau?";
    cin>> CubeExit;
if(CubeExit == "oui"){
    goto CubeStart;
}else{

}




}

int test()
{
cout<<"testfonction";
}

AirAndVolume.h

#ifndef AIRANDVOLUME_H
#define AIRANDVOLUME_H


class AirAndVolume
{
    public:
        AirAndVolume();


};

#endif // AIRANDVOLUME_H

main.cpp

#include <iostream>
#include "AirAndVolume.h"
using namespace std;

int main()
{
int MAINChois;
MAINStart:

    cout<<"    ----- CalculatorV -----"<<endl;
    cout<<"\n\n\n";
    cout<<"		~Volumes et Aires~\n\n1) Cube/Rectangle	2) Triangle\n3) Cylindre		4) Pyramide\n5) Cone			6) Sphere / Demi Sphere\n\n";

    cout<<"Select a option with the number of the option :";
    cin>>MAINChois;
switch(MAINChois){
    case 1:{
        AirAndVolume Cube;
        break;
    }
    case 2:{
        test a;
    }
    default:

    cout<<"unknow option."
    goto MAINStart;

}

}