Thread: Basic Order booking program for a Restaurant ....

Hello again ....

I have written a Basic program of an assignment on "Functions" related to a Restaurant Order Booking system.

I am facing following two problems in it :

1- I want to clear screen every time after a user's input so that the Screen related to User's input only show. What should I do to perform it?

2- While selecting Zero (0) to jump back to Main Menu from Sub-Menu, the program works perfect. But after selecting Sub-Menu Card option, the program only shows the Input Option and not reflecting complete Sub-Menu Card option before it. I couldn't understand what I am lacking here ..... !

I am providing the Program Code below and would be thankful if anyone of you point-out the missing error to run the program correctly.

Code:

#include <iostream>


using namespace std;


char mainmenucard (void);
char chinesecuisine(void);
char barbq(void);
char pakistanicuisine(void);
char beverages(void);


char aboveline(void);
char belowline(void);
char nextline(void);


char tabulation2(void);




int main()
{
    int mainmenu;
    mainmenu = (1,2,3,4);


    int submenu;
    submenu = (0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18);


    int friedrice = 0;
    int chickenshashlik = 0;
    int thaisoup = 0;
    int noodles = 0;
    int snacks = 0;
    int chickentikka = 0;
    int katakut = 0;
    int rashmikabab = 0;
    int chickenkerhai = 0;
    int biryani = 0;
    int quorma = 0;
    int nan = 0;
    int taftan = 0;
    int coke = 0;
    int sevenup = 0;
    int coffee = 0;
    int tea = 0;


          aboveline();
          nextline(); nextline(); nextline();


          cout << '\t' << "    " << "!.....  WELCOME TO THE DELICIOUS FOODS RESTAURANT .....!";
          nextline();


          mainmenucard();
          cin >> mainmenu;
          nextline(); nextline();


       while (0);
       {
            if ( mainmenu < 1 || mainmenu > 4 )
            {
                cout << tabulation2() << "PLEASE INPUT YOUR OPTION FROM MAIN MENU \n"; nextline();
                cout << tabulation2() << "1, 2, 3 OR 4 TO CHECK SUB MENU CARD: ";
                cin >> mainmenu;
                cin.ignore();
                nextline(); nextline();
            }


            if (mainmenu == 1 )
            {
                chinesecuisine();
            }


            if (mainmenu == 2 )
            {
                barbq();
            }


            if (mainmenu == 3 )
            {
                pakistanicuisine();
            }


            if (mainmenu == 4 )
            {
                beverages();
            }


       }


        while (1)
        {
            if (submenu == 0)
            {
                mainmenucard();
                cin >> mainmenu;
                nextline(); nextline();
            }


            nextline();
            cout << '\t' << "PRESS ZERO ( 0 ) TO RETURN BACK TO MAIN MENU \n";
            nextline();
            cout << '\t' << "PRESS ( 18 ) TO EXIT AND PRINT YOUR ORDER \n";
            nextline();
            cout << '\t' << "PLEASE PLACE YOUR ORDER HERE : ";
            cin >> submenu;
            nextline(); nextline();




            if (submenu == 1 )
            {
                friedrice++;
            }


            if (submenu == 2 )
            {
                chickenshashlik++;
            }


            if (submenu == 3 )
            {
                thaisoup++;
            }


            if (submenu == 4 )
            {
                noodles++;
            }


            if (submenu == 5 )
            {
                snacks++;
            }


            if (submenu == 6 )
            {
                chickentikka++;
            }


            if (submenu == 7 )
            {
                katakut++;
            }


            if (submenu == 8 )
            {
                rashmikabab++;
            }


            if (submenu == 9 )
            {
                chickenkerhai++;
            }


            if (submenu == 10 )
            {
                biryani++;
            }


            if (submenu == 11 )
            {
                quorma++;
            }


            if (submenu == 12 )
            {
                nan++;
            }


            if (submenu == 13 )
            {
                taftan++;
            }


            if (submenu == 14 )
            {
                coke++;
            }


            if (submenu == 15 )
            {
                sevenup++;
            }


            if (submenu == 16 )
            {
                coffee++;
            }


            if (submenu == 17 )
            {
                tea++;
            }




            if (submenu > 18)
            {
                nextline();
                cout << '\t' << "PRESS ZERO ( 0 ) TO RETURN BACK TO MAIN MENU \n";
                nextline();
                cout << '\t' << "PRESS ( 18 ) TO EXIT AND PRINT YOUR ORDER \n";
                nextline();
                cout << '\t' << "PLEASE PLACE YOUR ORDER HERE : ";
                cin >> submenu;
                nextline(); nextline();
            }


                else if ( submenu == 18 )
            {
                aboveline();
                nextline();nextline();nextline();
                cout << '\t' << "YOU ORDERED FOLLOWING FOODS : \n";
                nextline(); nextline();
                belowline();


                cout << '\t'<< "01- Fried Rice :" " " << friedrice << "\n"; nextline();
                cout << '\t'<< "02- Chicken Shashlik :" " " << chickenshashlik << "\n"; nextline();
                cout << '\t'<< "03- Thai Soup :" " " << thaisoup << "\n"; nextline();
                cout << '\t'<< "04- Noodles :" " " << noodles << "\n"; nextline();
                cout << '\t'<< "05- Snacks :" " " << snacks << "\n"; nextline();
                cout << '\t'<< "06- Chicken Tikka :" " " << chickentikka << "\n"; nextline();
                cout << '\t'<< "07- Kata Kut :" " " << katakut << "\n"; nextline();
                cout << '\t'<< "08- Rashmi Kabab :" " " << rashmikabab << "\n"; nextline();
                cout << '\t'<< "09- Chicken Kerhai :" << chickenkerhai << "\n"; nextline();
                cout << '\t'<< "10- Biryani :" " " << biryani << "\n"; nextline();
                cout << '\t'<< "11- Qourma :" " " << quorma << "\n"; nextline();
                cout << '\t'<< "12- Nan :" " " << nan << "\n"; nextline();
                cout << '\t'<< "13- Taftan :" " " << taftan << "\n"; nextline();
                cout << '\t'<< "14- Coke : " " " << coke << "\n"; nextline();
                cout << '\t'<< "15- 7-Up : " " " << sevenup << "\n"; nextline();
                cout << '\t'<< "16- Coffee :" " " << coffee << "\n"; nextline();
                cout << '\t'<< "17- Tea : " " " << tea << "\n"; nextline();
                belowline();
                cout << '\t' << "THANK YOU FOR YOUR ORDER - WE WILL DELIVER IT TO YOU SOON \n";
                nextline(); nextline();


                break;
            }


        }


}


char mainmenucard (void)
          {
          aboveline();
          nextline(); nextline(); nextline();nextline();


          cout << tabulation2() << tabulation2() << "'MAIN MENU CARD \n";
          cout << tabulation2() << tabulation2() << " ______________ \n";
          nextline(); nextline();


          cout << tabulation2() << " I T E M S \n";
          cout << tabulation2() << " _________ \n";
          nextline(); nextline(); nextline();


          cout << tabulation2() << "1- CHINESE CUISINE \n";
          nextline();nextline();


          cout << tabulation2() << "2- BAR B-Q \n";
          nextline();nextline();


          cout << tabulation2() << "3- PAKISTANIS CUISINE \n";
          nextline(); nextline();


          cout << tabulation2() << "4- BEVERAGES \n";
          nextline(); nextline();
          belowline();


          cout << tabulation2() << "PLEASE INPUT YOUR OPTION 1, 2, 3 OR 4 \n"; nextline();
          cout << tabulation2() << "FROM MAIN MENU TO CHECK SUB MENU CARD: ";
          }


char nextline(void)
    {
      cout << '\n';


    }


char tabulation2()
{
    cout << '\t' << '\t';
}


char aboveline()
{
  nextline(); nextline();
  cout << '\t' << " *************************************************************** ";
}


char belowline ()
{
   cout << '\t' << " *************************************************************** ";
   nextline(); nextline();
}




char chinesecuisine()
{
    aboveline();
    nextline(); nextline();
    cout << tabulation2() << "I- CHINESE CUISINE \n";
    cout << tabulation2() << "__________________ \n";
    nextline();


    cout << tabulation2() << "1- Fried Rice \n";
    nextline();


    cout << tabulation2() << "2- Chicken Shashlik \n";
    nextline();


    cout << tabulation2() << "3- Thai Soup \n";
    nextline();


    cout << tabulation2() << "4- Noodles \n";
    nextline();


    cout << tabulation2()  << "5- Snacks \n";
    nextline(); belowline();
}


char barbq()
{
    aboveline();
    nextline(); nextline();
    cout << tabulation2() << "II- BAR B-Q \n";
    cout << tabulation2() << "__________ \n";
    nextline();


    cout << tabulation2() << "6- Chicken Tikka \n";
    nextline();


    cout << tabulation2() << "7- Kata Kut \n";
    nextline();


    cout << tabulation2() << "8- Rashmi Kabab \n";
    nextline();
    cout << belowline();
}


char pakistanicuisine()
{
    aboveline();
    nextline(); nextline();
    cout << tabulation2() << "III- PAKISTANIS CUISINE \n";
    cout << tabulation2() << "_______________________ \n";
    nextline();


    cout << tabulation2() << "9- Chicken Kerhai \n";
    nextline();


    cout << tabulation2() << "10- Biryani \n";
    nextline();


    cout << tabulation2() << "11- Qourma \n";
    nextline();


    cout << tabulation2() << "12- Nan \n";
    nextline();


    cout << tabulation2() << "13- Taftan \n";
    nextline();
    belowline();
}


char beverages()
{
    aboveline();
    nextline(); nextline();
    cout << tabulation2() << "IV- BEVERAGES \n";
    cout << tabulation2() << "_____________ \n";
    nextline();


    cout << tabulation2() << "14- Coke \n";
    nextline();


    cout << tabulation2() << "15- 7-Up \n";
    nextline();


    cout << tabulation2() << "16- Coffee \n";
    nextline();


    cout << tabulation2()<< "17- Tea \n";
    nextline();
    belowline();
}

Just as a thought, what would happen if the menu was expanded and customers had the choice of 512 different meals?

The predicament this would present is (probably) not your fault but your teacher's fault. I hate the stupid menu programs. Nobody has programmed this stuff for a long, long time -- basically because it's a waste of time.

Edit: I'd like to amend my statement. Nobody has ever written code like this because, essentially, back in ye olden days there was no RAM to write code like this. Please ask your teacher to contact me. Thanks.

Edit 2: I'm sorry if I seem to be in a non-supportive mood but I'm tired of seeing crap like this (not your fault!) being constantly, over and over and over and over, being posted on this board. This kind of program isn't "programming", it's just rubbish. You've wasted a lot of time to write 460 lines of code that I'm sure your teacher may like but it's just not how things work.[/rant]

Edit 3: I'll have the Thai Soup

@ Hodor:


Don't blame the teacher, just blame me because I don't have any teacher. I am learning C++ from the Book "Jumping into C++" by myself. And I have just finished sixth Chapter learned only few basics e.g., Conditional Statements, Loops and Functions.


On the basis of it, I tried to accomplish my assignment given at the end of Chapter-6.


I thought this platform is meant for learning and sharing knowledge to/with others. However, if my stupid Codes/Program really so much annoyed you, I won't put such rubbish codes/crap on this board in future where such an intelegent people like you exits.


Meanwhile, I would sugges just to copy the codes and run them into your Compiler twice. Firstly without using the Input Zero and
secondly with the Zero Input. You would definitely notice that the program didn't broken rather at first time the program would run perfectly till the end. However, at the second time the program would also run till the end but it won't show the Sub-Menu Card either.




@ DeadPlanet:


The problem is not with the int mainmenu or submenu code.


If I would use While (1) in my loop, the program would stop at first stage and never goes beyond it. That's why I used While (0).


I have checked to input submenu loop inside menu loop, but it didn't work either.


The,

Code:

 if (submenu > 18) { ..... code .... }

, is not redundant/duplicate code. Rather, it would revalidate or check the wrong input of user (if he/she input the value greater than 17).


I have also detected the problem relates to my codes/program i.e, I have set mainmenucard functions outside the main block whereas I put/call the said function 2nd time within a submenu loop that's why the program only perform as per instructions set therewith.

Originally Posted by khanzhut

If I would use While (1) in my loop, the program would stop at first stage and never goes beyond it. That's why I used While (0).

in fact, just the opposite is true. while (0) will not execute the loop even once. while (1) will execute forever, or until a break or return statement is encountered. if the condition inside the parentheses of a while statement evaluate to false (0 is false), the loop stops. your problem is the semicolon after the while (0).

Thanks God ..... I have corrected the problem with the help of you people and are reproducing my codes again .... its perfectly running.

Code:

#include <iostream>


using namespace std;


// DECLARING FUNCTIONS


char mainmenucard (void);
char chinesecuisine(void);
char barbq(void);
char pakistanicuisine(void);
char beverages(void);


char aboveline(void);
char belowline(void);
char nextline(void);


char tabulation2(void);


// START MAIN


int main()
{


    // DEFINING VARIABLES


    int mainmenu;
    mainmenu = (1,2,3,4);


    int submenu;
    submenu = (0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18);


    int friedrice = 0;
    int chickenshashlik = 0;
    int thaisoup = 0;
    int noodles = 0;
    int snacks = 0;
    int chickentikka = 0;
    int katakut = 0;
    int rashmikabab = 0;
    int chickenkerhai = 0;
    int biryani = 0;
    int quorma = 0;
    int nan = 0;
    int taftan = 0;
    int coke = 0;
    int sevenup = 0;
    int coffee = 0;
    int tea = 0;


    // WELCOME SCREEN


          aboveline();
          nextline(); nextline(); nextline();


          cout << '\t' << "    " << "!.....  WELCOME TO THE DELICIOUS FOODS RESTAURANT .....!";
          nextline();


          mainmenucard();
          cin >> mainmenu;
          nextline(); nextline();


       // MAIN MENU CARD AND INPUT INSTRUCTIONS


       while (1)
       {


            if (mainmenu == 1 )
            {
                chinesecuisine();
            }


            else if (mainmenu == 2 )
            {
                barbq();
            }


            else if (mainmenu == 3 )
            {
                pakistanicuisine();
            }


            else if (mainmenu == 4 )
            {
                beverages();
            }


            if ( mainmenu < 1 || mainmenu > 4 )
            {
                cout << tabulation2() << "YOU INPUT WRONG VALUE - PLEASE TRY AGAIN : ";
                cin >> mainmenu;
                nextline(); nextline();
            }




           // INSTRUCTION FOR SUB-MENU CARD, RETURN BACK TO MAIN MENU OR INSTRUCTION TO EXIT / PRINT ORDER


            nextline();
            cout << tabulation2() << "PRESS ZERO ( 0 ) TO RETURN BACK TO MAIN MENU \n";
            nextline();
            cout << tabulation2() << "PRESS ( 18 ) TO EXIT AND PRINT YOUR ORDER \n";
            nextline();
            cout << tabulation2() << "PLEASE PLACE YOUR ORDER HERE : ";
            cin >> submenu;
            nextline(); nextline();


            if (submenu == 0)
            {
                mainmenucard();
                cin >> mainmenu;
                nextline(); nextline();
            }


            if (submenu == 1 )
            {
                friedrice++;
            }


            else if (submenu == 2 )
            {
                chickenshashlik++;
            }


            else if (submenu == 3 )
            {
                thaisoup++;
            }


            if (submenu == 4 )
            {
                noodles++;
            }


            else if (submenu == 5 )
            {
                snacks++;
            }


            else if (submenu == 6 )
            {
                chickentikka++;
            }


            else if (submenu == 7 )
            {
                katakut++;
            }


            else if (submenu == 8 )
            {
                rashmikabab++;
            }


            else if (submenu == 9 )
            {
                chickenkerhai++;
            }


            else if (submenu == 10 )
            {
                biryani++;
            }


            else if (submenu == 11 )
            {
                quorma++;
            }


            else if (submenu == 12 )
            {
                nan++;
            }


            else if (submenu == 13 )
            {
                taftan++;
            }


            else if (submenu == 14 )
            {
                coke++;
            }


            else if (submenu == 15 )
            {
                sevenup++;
            }


            else if (submenu == 16 )
            {
                coffee++;
            }


            else if (submenu == 17 )
            {
                tea++;
            }


            // REVALIDATE THE PROGRAM IF USER INPUT WRONG VALUE GREATER THAN 17


            else if (submenu > 18)
            {
                nextline();
                cout << tabulation2() << "YOU ENTERED WRONG VALUE ... PLEASE TRY AGAIN : ";
                cin >> submenu;
                nextline(); nextline();
            }


            // IF INPUT = 18, EXIT AND PRINT ORDER


                else if ( submenu == 18 )
            {
                aboveline();
                nextline();nextline();nextline();
                cout << '\t' << "YOU ORDERED FOLLOWING FOODS : \n";
                nextline(); nextline();
                belowline();


                cout << '\t'<< "01- Fried Rice :" " " << friedrice << "\n"; nextline();
                cout << '\t'<< "02- Chicken Shashlik :" " " << chickenshashlik << "\n"; nextline();
                cout << '\t'<< "03- Thai Soup :" " " << thaisoup << "\n"; nextline();
                cout << '\t'<< "04- Noodles :" " " << noodles << "\n"; nextline();
                cout << '\t'<< "05- Snacks :" " " << snacks << "\n"; nextline();
                cout << '\t'<< "06- Chicken Tikka :" " " << chickentikka << "\n"; nextline();
                cout << '\t'<< "07- Kata Kut :" " " << katakut << "\n"; nextline();
                cout << '\t'<< "08- Rashmi Kabab :" " " << rashmikabab << "\n"; nextline();
                cout << '\t'<< "09- Chicken Kerhai :" << chickenkerhai << "\n"; nextline();
                cout << '\t'<< "10- Biryani :" " " << biryani << "\n"; nextline();
                cout << '\t'<< "11- Qourma :" " " << quorma << "\n"; nextline();
                cout << '\t'<< "12- Nan :" " " << nan << "\n"; nextline();
                cout << '\t'<< "13- Taftan :" " " << taftan << "\n"; nextline();
                cout << '\t'<< "14- Coke : " " " << coke << "\n"; nextline();
                cout << '\t'<< "15- 7-Up : " " " << sevenup << "\n"; nextline();
                cout << '\t'<< "16- Coffee :" " " << coffee << "\n"; nextline();
                cout << '\t'<< "17- Tea : " " " << tea << "\n"; nextline();
                belowline();


                // THANKS MESSAGE


                cout << '\t' << "THANK YOU FOR YOUR ORDER - WE WILL DELIVER IT TO YOU SOON \n";
                nextline(); nextline();


                break;
        }


        }


}


// DEFINING FUNCTIONS


char mainmenucard (void)
          {
          aboveline();
          nextline(); nextline(); nextline();nextline();


          cout << tabulation2() << tabulation2() << "'MAIN MENU CARD \n";
          cout << tabulation2() << tabulation2() << " ______________ \n";
          nextline(); nextline();


          cout << tabulation2() << " I T E M S \n";
          cout << tabulation2() << " _________ \n";
          nextline(); nextline(); nextline();


          cout << tabulation2() << "1- CHINESE CUISINE \n";
          nextline();nextline();


          cout << tabulation2() << "2- BAR B-Q \n";
          nextline();nextline();


          cout << tabulation2() << "3- PAKISTANIS CUISINE \n";
          nextline(); nextline();


          cout << tabulation2() << "4- BEVERAGES \n";
          nextline(); nextline();
          belowline();


          cout << tabulation2() << "PLEASE INPUT YOUR OPTION 1, 2, 3 OR 4 \n"; nextline();
          cout << tabulation2() << "FROM MAIN MENU TO CHECK SUB MENU CARD: ";
          }


char chinesecuisine()
{
    aboveline();
    nextline(); nextline();
    cout << tabulation2() << "I- CHINESE CUISINE \n";
    cout << tabulation2() << "__________________ \n";
    nextline();


    cout << tabulation2() << "1- Fried Rice \n";
    nextline();


    cout << tabulation2() << "2- Chicken Shashlik \n";
    nextline();


    cout << tabulation2() << "3- Thai Soup \n";
    nextline();


    cout << tabulation2() << "4- Noodles \n";
    nextline();


    cout << tabulation2()  << "5- Snacks \n";
    nextline(); belowline();
}


char barbq()
{
    aboveline();
    nextline(); nextline();
    cout << tabulation2() << "II- BAR B-Q \n";
    cout << tabulation2() << "__________ \n";
    nextline();


    cout << tabulation2() << "6- Chicken Tikka \n";
    nextline();


    cout << tabulation2() << "7- Kata Kut \n";
    nextline();


    cout << tabulation2() << "8- Rashmi Kabab \n";
    nextline();
    cout << belowline();
}


char pakistanicuisine()
{
    aboveline();
    nextline(); nextline();
    cout << tabulation2() << "III- PAKISTANIS CUISINE \n";
    cout << tabulation2() << "_______________________ \n";
    nextline();


    cout << tabulation2() << "9- Chicken Kerhai \n";
    nextline();


    cout << tabulation2() << "10- Biryani \n";
    nextline();


    cout << tabulation2() << "11- Qourma \n";
    nextline();


    cout << tabulation2() << "12- Nan \n";
    nextline();


    cout << tabulation2() << "13- Taftan \n";
    nextline();
    belowline();
}


char beverages()
{
    aboveline();
    nextline(); nextline();
    cout << tabulation2() << "IV- BEVERAGES \n";
    cout << tabulation2() << "_____________ \n";
    nextline();


    cout << tabulation2() << "14- Coke \n";
    nextline();


    cout << tabulation2() << "15- 7-Up \n";
    nextline();


    cout << tabulation2() << "16- Coffee \n";
    nextline();


    cout << tabulation2()<< "17- Tea \n";
    nextline();
    belowline();
}


char aboveline()
{
  nextline(); nextline();
  cout << '\t' << " *************************************************************** ";
}


char belowline ()
{
   cout << '\t' << " *************************************************************** ";
   nextline(); nextline();
}


char nextline(void)
    {
      cout << '\n';


    }


char tabulation2()
{
    cout << '\t' << '\t';
}

Edit: You may try it by yourself in your Compiler.

Actually, your functions all return a char, or so you've told the compiler, but you are in reality not returning anything. That's an error. This will not compile on some compilers.
You probably meant that the function should not return anything, so you should change their return type to void.