немного иправить программу

#include <iostream>
#include <clocale>
#include <tchar.h>
 
using namespace std;
 
class drob {
double a,b,y,z,g,k;
public:
drob (double x,double y) {a = x,b = y;}
~drob ();
void sum ();
void min ();
void func2 ();
void func ();
double NOD (int r,int t);
};
 
drob::~drob () {};
 
void drob::sum ()
{
y = a + b;
cout«"Ñóììà ðàâíà: "«y«endl;
}
 
void drob::min ()
{
z = a - b;
cout«"Ðàçíîñòü ðàâíà: "«z«endl;
}
 
void drob::func ()
{
cout«"Âûáåðèòå ïóíêò èç ìåíþ: "«endl;
cout«"1.Ïîñ÷èòàòü ñóììó: "«endl;
cout«"2.Ïîñ÷èòàòü âû÷èòàíèå: "«endl;
cout«"3.Ïðèâåñòè äðîáü ê íåñîêðàòèìîìó âèäó: "«endl;
}
 
double drob::NOD (int r,int t)
{
cout«"Ââåäèòå r è t"«endl;
cin»r»t;
 
while (r!=t)
{
if(r>t)
if (r % t !=0)
r %= t;
else a=b;
else
if (r % t != 0)
r %= t;
else r = t;
}
return t;
}
void drob::func2 ()
{
if(g == 0)
return;
int n = NOD (g,k);
g /= n;
k /= n;
 
cout«g;
}
 
int _tmain(int argc, _TCHAR* argv[])
{
setlocale (LC_ALL,"Russian");
 
drob pr (13.5,14.6),m (15.7,123.6);
int menu;
char c;
bool done;
 
do {
pr.func ();
cout«"Ââåäèòå ïóíêò ìåíþ: ";
cout«endl;
cin»menu;
 
switch (menu) {
case 1 : pr.sum ();break;
case 2 : pr.min ();break;
case 3: pr.func2 ();
default : "Òàêîãî ïóíêòà ìåíþ íåòó!"; 
}
cout«"Ïðîäîëæèòü (y/n)"«endl;
cin»c;
done = (c != 'y');
 
} while (!done);
 
system ("pause");
return 0;
}

#include <iostream>
#include <clocale>
#include <tchar.h>
 
using namespace std;
 
class drob {
double a,b,y,z,g,k;
public:
drob (double x,double y) {a = x,b = y;}
~drob ();
void sum ();
void min ();
void func2 ();
void func ();
double NOD (int r,int t);
};
 
drob::~drob () {};
 
void drob::sum ()
{
y = a + b;
cout<<"Ñóììà ðàâíà: "<<y<<endl;
}
 
void drob::min ()
{
z = a - b;
cout<<"Ðàçíîñòü ðàâíà: "<<z<<endl;
}
 
void drob::func ()
{
cout<<"Âûáåðèòå ïóíêò èç ìåíþ: "<<endl;
cout<<"1.Ïîñ÷èòàòü ñóììó: "<<endl;
cout<<"2.Ïîñ÷èòàòü âû÷èòàíèå: "<<endl;
cout<<"3.Ïðèâåñòè äðîáü ê íåñîêðàòèìîìó âèäó: "<<endl;
}
 
double drob::NOD (int r,int t)
{
cout<<"Ââåäèòå r è t"<<endl;
cin>>r>>t;
 
while (r!=t)
{
if(r>t)
if (r % t !=0)
r %= t;
else a=b;
else
if (r % t != 0)
r %= t;
else r = t;
}
return t;
}
void drob::func2 ()
{
if(g == 0)
return;
int n = NOD (g,k);
g /= n;
k /= n;
 
cout«g;
}
 
int _tmain(int argc, _TCHAR* argv[])
{
setlocale (LC_ALL,"Russian");
 
drob pr (13.5,14.6),m (15.7,123.6);
int menu;
char c;
bool done;
 
do {
pr.func ();
cout<<"Ââåäèòå ïóíêò ìåíþ: ";
cout<<endl;
cin>>menu;
 
switch (menu) {
case 1 : pr.sum ();break;
case 2 : pr.min ();break;
case 3: pr.func2 ();
default : "Òàêîãî ïóíêòà ìåíþ íåòó!"; 
}
cout<<"Ïðîäîëæèòü (y/n)"<<endl;
cin>>c;
done = (c != 'y');
 
} while (!done);
 
system ("pause");
return 0;
}