C++ For, Prims or Ins't Prime
char choice (2);
cout<<"input a number = ";
cin>>x;
for (int y = 1; y<=x; y++)
{
if (x % y == 0)
{
z++;
}
}
if (z==2)
{
cout<<"Prime"<<endl;
}
else
{
cout<<"isn't prime"<<endl;
}
cout<<"back to menu [y/n] : ";
cin>>choice;
if(choice == 'y')
{
goto a;
}
else
{
system("cls");
}
} 