Thread: Ugent pls help

The owner of the ‘Lunch Café’ aims to sell daily a reasonably-priced three-course lunch to the local student community. To save costs, each day there is only a single choice of starter, main course and dessert. As with most establishments of its kind, the largest profit comes from selling the main courses. Unfortunately, the local students being frugal, hard-working and cost-conscious tend to only order a starter and/or a dessert.
As an incentive to order main courses, the owner has decided – where customers order a main course – to provide, free of charge:
• a soft drink if they also order a starter;
• coffee if they also order a dessert;
• both a soft drink and a coffee if all 3 courses are ordered.
If customers do not order a main course or if they only order a main course, then there are no drinks provided.
You are to write a program that advises staff what to provide. The program should ask what course(s) the customer is ordering and output what is to be provided. The choices are:
• starter at RM3
• main course at RM6
• dessert at RM4
• soft drink at RM1.5 (free only if both a starter & a main course have been ordered)
• coffee at RM2 (free only of both a dessert & a main course have been ordered)






Menu:
Do you want to order starter? (true/false): true
No of starter: 1

Do you want to order main course? (true/false): true
No of main course: 2
Do you want to order dessert? (true/false): true
No of dessert:1
You have ordered 1 starters, 2 main course, 1 dessert,1 soft drink, 1 coffee
Total: RM19
Press 1 to next order and 0 to exit: __1





here is what i have done so far, i really dont know how to put the if and else statement

 //
 
import java.util.Scanner;
 
public class courseWork {
	static int no_starter,  no_mainCourse, no_desert, no_softDrink, no_coffee ;
   public static void main(String[] args) {
 
 
      int input;
      Scanner stdio = new Scanner( System.in );
 
      double Total = 0; // Total value of all the orders.
 
      /* Ask the user for the number of each type of course. */
 
      System.out.println("Do you want to order starter? ");
      input = stdio.nextInt();
 
 
      if(input == 1){
    	  System.out.print("Enter the number of starter:  ");
      no_starter = stdio.nextInt();
      stdio.nextLine();}
 
 
      System.out.println("Do you want to order main course?");
      input = stdio.nextInt();
 
      if(input == 1){
      System.out.print("Enter the number of main course: ");
      no_mainCourse = stdio.nextInt();
      stdio.nextLine();
      }
 
      System.out.println("Do you want to order desert?");
      input = stdio.nextInt();
 
      if(input == 1){
      System.out.print("Enter the number of desert: ");
      no_desert = stdio.nextInt();
      stdio.nextLine();
      }
 
      System.out.println("Do you want to order soft drink?");
      input = stdio.nextInt();
 
      if(input == 1){
      System.out.print("Enter the number of soft drink: ");
      no_softDrink = stdio.nextInt();
      stdio.nextLine();
      }
 
      System.out.println("Do you want to order coffee? ");
      input = stdio.nextInt();
      if(input == 1){
 
      System.out.print("Enter the number of coffee: ");
      no_coffee = stdio.nextInt();
      stdio.nextLine();
      }
      /* Add up the prices of the ordered courses. */
      double p_starter=(3*no_starter), p_mainCourse=(6*no_mainCourse), p_desert=(4*no_desert) , p_softDrink=(1.5*no_softDrink), p_coffee=(2*no_coffee);

//

i don't really know how to do that. wrap my code how?

oke now got it.

yh it is suppose to look like ask if the user wants to order starter if "yes" then enter the amount, but i tried using the scanner to enter input as y which will be yes but its giving me error each time

this is the code that i was using input as string.

//
import java.util.*;
 
public class Course_work {
 
  Scanner use = new Scanner(System.in);
 
 public  void main(String[] args) {
 
		int no_starter,  no_mainCourse, no_desert;
		String input,t = null,f= null;
		double total;
 
 
 
        System.out.println("Do you want to order starter?");
		input= use.nextLine();
 
 
		if (input == t)
		{
			System.out.println("Enter No of starter: ");
			no_starter= use.nextInt();
			use.nextLine();
			}
		System.out.println("Do you want to order main course? ");
		input= use.nextLine();
 
		if (input == t){
			System.out.println("Enter No of main course: ");
		no_mainCourse= use.nextInt();
		use.nextLine();
		}
 
		System.out.println("Do you want to order desert? ");
		input= use.nextLine();
 
		if (input == t){
 
			System.out.println("Enter No of desert: ");
		no_desert = use.nextInt();
		use.nextLine();
		}
 
		System.out.println("You have oedered " +no_starter +"Starter," +no_mainCourse + "main course" +no_desert + "desert");
 
		}
 
        }

//

and this is the error
Do you want to order starter?
y
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at courseWork.main(courseWork.java:16)

that was the only error message it showed coz im using eclipse.

this is the one that im currently working with, if u could just help me ajust it in such a way that i use the 'y' as input using the scanner instead of 1. And my if and else are too much and when the program execute it gives me an incorrect value as the Total.

//
 
import java.util.Scanner;
 
public class courseWork {
	static int no_starter,  no_mainCourse, no_desert, no_softDrink, no_coffee ;
   public static void main(String[] args) {
 
 
      int input;
      Scanner stdio = new Scanner( System.in );
 
      double Total = 0; // Total value of all the orders.
 
      /* Ask the user for the number of each type of course. */
 
      System.out.println("Do you want to order starter? ");
      input = stdio.nextInt();
 
 
      if(input == 1){
    	  System.out.print("Enter the number of starter:  ");
      no_starter = stdio.nextInt();
      stdio.nextLine();}
 
 
      System.out.println("Do you want to order main course?");
      input = stdio.nextInt();
 
      if(input == 1){
      System.out.print("Enter the number of main course: ");
      no_mainCourse = stdio.nextInt();
      stdio.nextLine();
      }
 
      System.out.println("Do you want to order desert?");
      input = stdio.nextInt();
 
      if(input == 1){
      System.out.print("Enter the number of desert: ");
      no_desert = stdio.nextInt();
      stdio.nextLine();
      }
 
      System.out.println("Do you want to order soft drink?");
      input = stdio.nextInt();
 
      if(input == 1){
      System.out.print("Enter the number of soft drink: ");
      no_softDrink = stdio.nextInt();
      stdio.nextLine();
      }
 
      System.out.println("Do you want to order coffee? ");
      input = stdio.nextInt();
      if(input == 1){
 
      System.out.print("Enter the number of coffee: ");
      no_coffee = stdio.nextInt();
      stdio.nextLine();
      }
      /* Add up the prices of the ordered courses. */
      double p_starter=(3*no_starter), p_mainCourse=(6*no_mainCourse), p_desert=(4*no_desert) , p_softDrink=(1.5*no_softDrink), p_coffee=(2*no_coffee);
 
 
 
 
 
 
       if(no_starter >= 1 && no_mainCourse >=1 || no_softDrink>=1){
    	  Total = p_starter + p_mainCourse;
      }
 
      else if(no_starter >= 1 && no_mainCourse >=1 && no_coffee >=1){
    	  Total = p_starter + p_mainCourse + p_coffee;
      }
 
      else if(no_starter >=1 && no_mainCourse >=1 && no_desert >=1 || no_softDrink >=1 || no_coffee >=1)
      {
    	  Total =  p_starter + p_mainCourse + p_desert;
      }
      else if(no_desert >= 1 && no_mainCourse >=1 || no_coffee>=1){
    	  Total = p_mainCourse + p_desert;
      }
      else if(no_mainCourse >= 1 && no_softDrink >= 1 && no_softDrink >= 1){
    	  Total =  p_mainCourse + p_softDrink + p_softDrink;
      }
 
      else if(no_softDrink >=1 && no_coffee >=1)
      {
    	  Total=   p_softDrink +  p_coffee;
      }
      else if(no_softDrink >=1 && no_coffee >=1 && no_desert >=1)
      {
    	  Total=   p_softDrink +  p_coffee + p_desert;
      }
      else if(no_softDrink >=1 && no_coffee >=1 && no_mainCourse >=1)
      {
    	  Total=   p_softDrink +  p_coffee + p_mainCourse;
      }
 
      else if(no_softDrink >=1 && no_coffee >=1 && no_starter >=1)
      {
    	  Total=   p_softDrink +  p_coffee + p_starter;
      }
 
      else{
    	  System.out.println("nothing has been ordered");
    	  Total = 0;
      }
 
      /* Report the result back to the user. */
 
      System.out.println("You have oedered " + no_starter + " Starter " + no_mainCourse + " main course " + no_desert + " desert " + no_softDrink + " soft drink" + no_coffee + " coffee ");
      System.out.println();
      System.out.print("The total ");
      System.out.print(Total);  // Formatted output!
      System.out.println();
 
   }  // end main()
 
}  // end class

//

oke i have change the method of using string to scan the string, but what operator should i use here "if (input == t)" coz i tried using this" if (input != t)" and it work but it doesont matter weather i press t or anything it still skips and ask me to enter the number of course.

it seems alittle advance for me tho i checked through the API doc but i couldn't pull out anything as i'm not even sure what i'm looking for, pls help norm.

all i want to do is, if the program ask if i want t order starter the i press t, then it ask me to enter the number of staters i want, but if i press n then it jumps that and straight away ask me if i want to order main course

ok, firstly it asks the user if he wants to order a starter if yes then it goes on to ask for how many starter he wants to order after her puts the number the program goes to the next and ask the user again if he wants to order a main course if yes then ask for how many main course he wants to order it keeps asking till it reaches the last one which is coffee, after that it will print out how many of each course has he ordered the calculates the amount for each and displays the total. e.g
Menu:
Do you want to order starter? (true/false): true
No of starter: 1

Do you want to order main course? (true/false): true
No of main course: 2
Do you want to order dessert? (true/false): true
No of dessert:1
You have ordered 1 starters, 2 main course, 1 dessert,1 soft drink, 1 coffee
Total: RM19
Press 1 to next order and 0 to exit: __1

then not forgetting that
starter at RM3
• main course at RM6
• dessert at RM4
• soft drink at RM1.5 (free only if both a starter & a main course have been ordered)
• coffee at RM2 (free only of both a dessert & a main course have been ordered)

it must save that response in other to determine the last answers, and must execute the next step which is another question.

not an assignment statement, i meant literary it will take the response to know what to to do next, which is if t is been entered then the next thing is to ask the user of how many if not then skip to the next and request a responce of t again only at the last response the it shows all what has been entered.