The user will enter product and quantity while they want and when they do not want the program should show a total bill

Question

1.00/5 (2 votes)

See more:

i am making a c++ program of hotel management system.I want that the user will enter product number and quantity.After writing, the program will ask if the user wants to order any other product if he write 'y'the program should again ask to enter product number and quantity.It should continue while user wants.
When the user writes 'n'instead of 'y'
the program should show the total amount.Also it should show which product i have order and quantity and total rupess for each of them in bill and at last it should show the net amount.

What I have tried:

C++

#include<iostream.h>                  
#include<conio.h>
void main()
{
clrscr();
start:
cout<<"--------------------------------HOTEL RED CHILLIES------------------------------" ;
cout<<"                             M.G.ROAD RAIPUR - 492001";
cout<<"\n\t\t\t\tPHONE: 0771-4024196";
cout<<"\n--------------------------------------------------------------------------------";

cout<<"*CATEGORIES*\t\tPrice\t\t *CATEGORIES*\t\tPrice"  ;

cout<<"\n\nChinese Noodles\t\t\t Pizza";
cout<<"\n\n1.Veg Chowmein\t\t 100 \t\t 7.Red Green Pizza\t 160";
cout<<"\n2.Chili Garlic Noodles\t 100\t\t 8.Deluxe Margherita\t 180";
cout<<"\n3.American Chop Suey\t 110\t\t 9.Tomato Deluxe\t 180";

cout<<"\n------------------------------\t\t -----------------------------";

cout<<"\n\nPasta\t\t\t\t\t Soup";
cout<<"\n\n4.Pasta Red Sauce\t 160\t\t 10.Hot and Sour\t 70";
cout<<"\n5.Pasta Mexican\t\t 160\t\t 11.Tomato Soup\t\t 70";
cout<<"\n6.Pasta White Sauce\t 170\t\t 12.Manchow Soup\t 70";

cout<<"\n-------------------------------\t\t -----------------------------";
int num,qt,i=0,t,sum;
char pro;

do
{cout<<"\nEnter the product number(1-12)- ";
cin>>num;
cout<<"\nEnter the quantity- ";
cin>>qt;
switch(num)
{
case 1: t=100*qt;
case 2: t=100*qt;
case 3: t=100*qt;
case 4: t=100*qt;
case 5: t=100*qt;
case 6: t=100*qt;
case 7: t=100*qt;
case 8: t=100*qt;
case 9: t=100*qt;
case 10: t=100*qt;
case 11: t=100*qt;
case 12: t=100*qt;
}

cout<<"\nDo you want to order any other product(y/n) ";
cin>>pro;

if(pro=='y')
{
clrscr();
goto start;

}
}
while(pro=='y');
do{
for(t=1; ;t++)
sum=t;}
while(pro=='y') ;
if(pro=='n')
cout<<"total is"<<sum;

Posted 6-Feb-18 20:01pm

Member 13665211

Updated 6-Feb-18 23:58pm

CPallini

v2

Add a Solution

Comments

OriginalGriff 7-Feb-18 2:26am

And?
What does it do that you didn't expect, or not do that you did?
What have you tried to find out why?
Where are you stuck?
What help do you need?

Member 13665211 7-Feb-18 2:30am

i have used do while statement.
in last i am rying to use do while statement to calculate the total forall

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2018-02-06T21:51:00

Don't use goto, you don't really need it.
Don't use such an ancient compiler (conio.h has gone long time ago).
Do use structured data.
Do use STL containers.

A C++98 implementation sketch

C++

#include <iostream>
#include <vector>

using namespace std;


struct Product
{
  string desc;
  int price;
  Product(string desc, int price):desc(desc), price(price){}
};


void show_menu(const vector<Product> & vp);

int main()
{
  vector <Product> vp;

  vp.push_back(Product("Veg Chowmein", 100));
  vp.push_back(Product("Chili Garlic Noodles", 110));
  // add more products...


  int sum = 0;

  while (true)
  {
    show_menu(vp);
    int index, qty;
    cin >> index;
    if ( index == -1) break;
    --index;
    if ( index >= 0 && index < static_cast<int>(vp.size()) )
    {
      cout << "please enter quantity" << endl;
      cin >> qty;
      sum += (qty * vp[index].price);
    }
  }
  cout << "the sum is " << sum << endl;
}


void show_menu( const vector<Product> & vp)
{
  cout << "please choose product (-1 to exit)" << endl;
  for (size_t n=0; n<vp.size(); ++n)
  {
    const Product & p = vp[n];
    cout << (n+1) << " " << p.desc << " " << p.price << endl;
  }
}

[update]
Using an array instead of std::vector

C++

#include <iostream>

using namespace std;

struct Product
{
  string desc;
  int price;
  Product(string desc, int price):desc(desc), price(price){}
};

void show_menu( Product ap[], int ITEMS);

int main()
{
  Product ap[] = { 
     Product("Veg Chowmein", 100), 
     Product("Chili Garlic Noodles", 110)
  };
  // add more products..

  const int ITEMS = sizeof(ap)/sizeof(ap[0]);

  int sum = 0;

  while (true)
  {
    show_menu(ap, ITEMS);
    int index, qty;
    cin >> index;
    if ( index == -1) break;
    --index;
    if ( index >= 0 && index <ITEMS )
    {
      cout << "please enter quantity" << endl;
      cin >> qty;
      sum += (qty * ap[index].price);
    }
  }
  cout << "the sum is " << sum << endl;
}


void show_menu( Product ap[], int ITEMS)
{
  cout << "please choose product (-1 to exit)" << endl;
  for (int n=0; n<ITEMS; ++n)
  {
    const Product & p = ap[n];
    cout << (n+1) << " " << p.desc << " " << p.price << endl;
  }
}

[/update]

Richard MacCutchan · Answer 2 · 2018-02-06T22:20:00

Solution 3

C++

cin>>qt;
switch(num)
{
case 1: t=100*qt;
case 2: t=100*qt;
case 3: t=100*qt;
case 4: t=100*qt;
case 5: t=100*qt;
case 6: t=100*qt;
case 7: t=100*qt;
case 8: t=100*qt;
case 9: t=100*qt;
case 10: t=100*qt;
case 11: t=100*qt;
case 12: t=100*qt;
}

What is the point of this switch block, since every case calculates the same value? And since you have no break statements you just repeat the same calculation up to 12 times.

Posted 6-Feb-18 22:20pm

Richard MacCutchan

Comments

Member 13665211 7-Feb-18 4:31am

no i have not edited the price.I just copied 12 times for 12 products.When the program will be made i will just rename

Richard MacCutchan 7-Feb-18 4:52am

Well that code is still wrong.

Member 13665211 7-Feb-18 5:59am

please can u send me the exact code

Member 13665211 7-Feb-18 6:01am

please can u send me.the exact code

Member 13665211 7-Feb-18 6:40am

i have uploaded the whole code which i have made.Please can u send me the afterward code..You can make any changes

Richard MacCutchan 7-Feb-18 7:05am

I cannot do your work for you, only help you to fix errors. Go back to your study notes and check the proper syntax of a switch block. Think what you are trying to do: if the total for a product is the quantity times the price, then you do not need to test which product it is before doing the calculation. Try and make use of functions to do commonly repeated tasks, rather than having everything inline.

Member 13665211 7-Feb-18 7:08am

i just want you to do that tell me how can i just do total=prod*quantity while user want and display net total using do while

Richard MacCutchan 7-Feb-18 7:15am

Why do you need do/while? The answer is simply: total = price * quantity. So after doing that calculation you can display the details using cout. If you want the total amount for all products then set another variable grandtotal to zero at the beginning, and then every time through the loop you just add the latest total to it.

Member 13665211 7-Feb-18 7:27am

please can u send me the loop format as per my coding for doing grandtotal bcz when i does it just go on infinity

Richard MacCutchan 7-Feb-18 8:17am

A for loop is not that difficult:

int index;
for (index = 0; index < 10; index++)
{        I           T        E
    // I: set the initial value to zero
    // perform the code inside the braces
    // E: perform any end of loop expression - in this case add 1 to index
    // T: perform any test expression - in this case compare index to 10, if it is less then repeat the loop, if it is equal or greater terminate the loop
//
}

Member 13665211 7-Feb-18 8:22am

i know but i am not able to do the sane for calculating the total and grandtotal for all product

Richard MacCutchan 7-Feb-18 8:45am

Programming is not just about writing code, it is more thinking about what you are trying to achieve. Start with a piece of paper and write down your requirements:
- What input data do you need to receive?
- what output information do you need to produce?
- how do you use the input data to create the outputs?
- what interim or temporary values do you need to keep?
etc.

From that you can start planning your actual program. Set out the variables that you will be using and what they will be used for. Think about what common functions you need to do calculations, capture input values, print reports etc. you can then code the skeleton of your program and test what happens when you run it. So a simple start point coudl be something like:

int calculate(int quantity, int price)
{
    // this is an oversimplification of a function

    int tot = quantity * price;
    return tot;
}
int main()
{
    int grandtotal;
    int total;
    int quantity;
    int price;
    char answer;
    grandtotal = 0;
    do
    {
        cout << "What\'s the quantity?" << endl;
        cin >> quantity;
        if (quantity == 0)
            break; // get out of this loop
        cout << "What\'s the price?" << endl;
        cin >> price;
        total = calculate(quantity, price);
        //
        // display interim result
        //
        grandtotal = grandtotal + total
    } while (true)
    // print the grandtotal message
}

Member 13665211 10-Feb-18 1:41am

i have created this code
can u help me to get the grandtotal of all the product and quantity
#include<iostream.h> 7
#include<conio.h>
int calculate(int quantity, int price)
{
// this is an oversimplification of a function

int tot = quantity * price;
return tot; }
void main()
{
clrscr();
start:
cout<<"--------------------------------HOTEL RED CHILLIES------------------------------" ;
cout<<" M.G.ROAD RAIPUR - 492001";
cout<<"\n\t\t\t\tPHONE: 0771-4024196";
cout<<"\n--------------------------------------------------------------------------------";

cout<<"*CATEGORIES*\t\tPrice\t\t *CATEGORIES*\t\tPrice" ;

cout<<"\n\nChinese Noodles\t\t\t Pizza";
cout<<"\n\n1.Veg Chowmein\t\t 100 \t\t 7.Red Green Pizza\t 160";
cout<<"\n2.Chili Garlic Noodles\t 100\t\t 8.Deluxe Margherita\t 180";
cout<<"\n3.American Chop Suey\t 110\t\t 9.Tomato Deluxe\t 180";

cout<<"\n------------------------------\t\t -----------------------------";

cout<<"\n\nPasta\t\t\t\t\t Soup";
cout<<"\n\n4.Pasta Red Sauce\t 160\t\t 10.Hot and Sour\t 70";
cout<<"\n5.Pasta Mexican\t\t 160\t\t 11.Tomato Soup\t\t 70";
cout<<"\n6.Pasta White Sauce\t 170\t\t 12.Manchow Soup\t 70";

cout<<"\n-------------------------------\t\t -----------------------------";
int num,qt,total;
char pro;
int grandtotal;
grandtotal=0;
do
{cout<<"\nEnter the product number(1-12)- ";
cin>>num;
switch(num)
{
case 1: cout<<"\nEnter the quantity- ";
cin>>qt;
total=100*qt;

break;
case 2: cout<<"\nEnter the quantity- ";
cin>>qt;
total=100*qt;

break;
case 3: cout<<"\nEnter the quantity- ";
cin>>qt;
total=110*qt;

break;
case 4: cout<<"\nEnter the quantity- ";
cin>>qt;
total=160*qt;

break;
case 5: cout<<"\nEnter the quantity- ";
cin>>qt;
total=160*qt;

break;
case 6: cout<<"\nEnter the quantity- ";
cin>>qt;
total=170*qt;

break;
case 7: cout<<"\nEnter the quantity- ";
cin>>qt;
total=160*qt;

break;
case 8: cout<<"\nEnter the quantity- ";
cin>>qt;
total=180*qt;

break;
case 9: cout<<"\nEnter the quantity- ";
cin>>qt;
total=180*qt;

break;
case 10: cout<<"\nEnter the quantity- ";
cin>>qt;
total=70*qt;

break;
case 11: cout<<"\nEnter the quantity- ";
cin>>qt;
total=70*qt;

break;
case 12: cout<<"\nEnter the quantity- ";
cin>>qt;
total=70*qt;

break;
}

cout<<"\nDo you want to order any other product(y/n) ";
cin>>pro;

if(pro=='y')
{
clrscr();
goto start;

}
grandtotal=grandtotal+total;

}
while(pro=='y');

if(pro=='n')
cout<<"total is"<<grandtotal;

getch();
}

Richard MacCutchan 10-Feb-18 3:43am

Why have you gone back to repeating the same code 12 times? I showed you how to do it properly in my previous message; use that as a starting point.

Patrice T · Answer 3 · 2018-02-06T23:58:00

You need to learn the usage of break in a switch statement.
-----
Learn to indent properly your code, it show its structure and it helps reading and understanding. It also helps spotting structures mistakes.

C++

while(pro=='y');
do{
    for(t=1; ;t++)
sum=t;
}
while(pro=='y') ;
if(pro=='n')
    cout<<"total is"<<sum;

Professional programmer's editors have this feature and others ones such as parenthesis matching and syntax highlighting.
Notepad++ Home[^]
ultraedit[^]
-----
There is a tool that allow you to see what your code is doing, its name is debugger. It is also a great learning tool because it show you reality and you can see which expectation match reality.
When you don't understand what your code is doing or why it does what it does, the answer is debugger.
Use the debugger to see what your code is doing. Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to. When the code don't do what is expected, you are close to a bug.

The user will enter product and quantity while they want and when they do not want the program should show a total bill

3 solutions

Solution 2

Solution 3

Solution 4

Add your solution here

Preview 0