2010 Final IPE_UNIXC-1151a question 1

#include <iostream>
using namespace std;
int main()
{
        int mt;
      char ask;
      cout<<"Do you want to continue y or n  ";
        cin>>ask;

       
        while(ask=='y' || ask=='Y' )
        {

      cout<<"Enter your Menu type  :";
      cin>>mt;
      if(mt==1)
      {
      cout<<"Your total cost is =  "<<(150+250+320)*95/100<<endl;
      }
      else if(mt==2)
      {
      cout<<"your total cost is =  "<<(170+280+360)*93/100<<endl;
      }
      else if(mt==3)
        {
        cout<<"your total cost is =  "<<(200+350+400)*91/100<<endl;
      }
      else if(mt==4)
        {
        cout<<"your total cost is =  "<<(250+380+450)*90/100<<endl;
      }

      else
      {
      cout<<"invalid Menu type "<<endl;
      }
        cout<<"Do you want to continue y or n :  ";
      cin>>ask;
      }

        return 0;

}