Re: Programming assignment, what am I doing wrong?
- From: "Dale Leavens" <dleavens@xxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Wed, 14 Jul 2010 23:09:54 -0400
If I understand the assignment correctly you need to analyze the problem more
fully and work out the desktop model more precisely before you do your coding.
You aren't accumulating the number of registrants from the various companies
and you aren't calculating the cost per company. For example you say if
registrants are 1 to three then the cost is 150 but that isn't correct. It is
the number of registrants times 150. Both the number of registrants and that
total for that company must be accumulated and must have the next company
information added to it. Only when a negative number is entered is the total
accumulated fee divided by the total number of registrants to arrive at the
average registration cost. All of this must happen within your loop before the
negative number is added then the final average calculation on exit.
Have you been introduced to function calls yet? I mean apart from the "main()"
function? If so, this would be the place to use one in your loop.You probably
should use a float value for your average since this is likely to be a
non-integer.
Hope I have interpreted the problem correctly and that this is helpful and not
confusing the issue further.
It is a long time since I programmed in C so I can't comment safely on your
syntax.
----- Original Message -----
From: Jes
To: programmingblind@xxxxxxxxxxxxx
Sent: Wednesday, July 14, 2010 10:02 PM
Subject: Programming assignment, what am I doing wrong?
Hi all,
HEre is the exact instructions for this programming assignment, along with my
code and the errors I am getting.
Thanks for any help.
***Programming Assignment:
In this exercise, you create a program that displays the registration
information for programming seminars. The price per person depends on the
number of people a company registers. (For example, if a company registers four
people, then the amount owed by that company is $400.) The following chart
shows the charges per registrant.
Number of registrants Charge per person ($)
1–3 150
4–9 100
10 or more 90
Create an IPO chart for the problem. Use a while loop to allow the user to
enter the number of people a company registers. The program should allow the
user to enter the number registered for as many companies as desired. Be sure
to use an appropriate sentinel value. The program should display the total
number of people registered, the total charge, and the average charge per
registrant. (For example, if one company registers 4 people and a second
company registers 2 people, then the total number of people registered is 6,
the total charge is $700, and the average charge per registrant is $116.67.)
Open the Ch7AppE04 Solution (Ch7AppE04 Solution.sln) file, which is contained
in the Cpp5\Chap07\Ch7AppE04 Solution folder. Use the IPO chart you created in
Step a to code the program.
Complete a desk-check table for the program. Use 3 as the number of people
registered by the first company, 12 as the number registered by the second
company, and 9 as the number registered by the third company; then enter your
sentinel value.
Save and then build the solution. Execute the program. Use the data from Step
c to test the program.
When the program is working correctly, use the File menu to close the
solution.
***My code:
//Ch7AppE04.cpp
//Displays registration information
//Created/revised by <your name> on <current date>
#include <iostream>
#include <iomanip>
using std::cout;
using std::cin;
using std::endl;
//using std::fixed;
//using std::setprecision;
//declare variables
int regNumber = 0;
//regNumber is the counter.
int totalPrice = 0;
//accumulator //Adds number of registrations until user enters negative
number to stop acumulating.
//The negative number is known as the senteniel value, which is the value
which stops the loop.
int main()
{
cout << "Enter number of registrations.\n Press enter after each number.\n
Enter a negative number to get the total price: " << endl;
cin >> regNumber;
do while (regNumber >= 0)
{
cout << "Enter your next entry. Remember, enter negative number to get total
price: " <<endl;
cin >> regNumber;
+=regNumber;
} //endwhile
regNumber + total
if (regNumber > 1 && regNumber < 3)
totalPrice = 150;
else if (regNumber > 4 < 9);
totalPrice = 100;
else if (regNumber > 10)
totalPrice = 90;
cout << totalPrice;
return 0;
} //end of main function
***Output results in Visual Studio 2008, after building the solution:
------ Build started: Project: Ch7AppE04 Project, Configuration: Debug Win32
------
Compiling...
cl : Command line warning D9035 : option 'Wp64' has been deprecated and will
be removed in a future release
Ch7AppE04.cpp
c:\course technology\83618-4\cpp5\chap07\ch7appe04 solution\ch7appe04
project\ch7appe04.cpp(29) : error C2143: syntax error : missing ';' before '+='
c:\course technology\83618-4\cpp5\chap07\ch7appe04 solution\ch7appe04
project\ch7appe04.cpp(31) : error C2061: syntax error : identifier 'regNumber'
c:\course technology\83618-4\cpp5\chap07\ch7appe04 solution\ch7appe04
project\ch7appe04.cpp(35) : error C2181: illegal else without matching if
c:\course technology\83618-4\cpp5\chap07\ch7appe04 solution\ch7appe04
project\ch7appe04.cpp(35) : warning C4804: '<' : unsafe use of type 'bool' in
operation
c:\course technology\83618-4\cpp5\chap07\ch7appe04 solution\ch7appe04
project\ch7appe04.cpp(36) : warning C4390: ';' : empty controlled statement
found; is this the intent?
c:\course technology\83618-4\cpp5\chap07\ch7appe04 solution\ch7appe04
project\ch7appe04.cpp(37) : error C2181: illegal else without matching if
Build log was saved at "file://c:\Course
Technology\83618-4\Cpp5\Chap07\Ch7AppE04 Solution\Ch7AppE04
Project\Debug\BuildLog.htm"
Ch7AppE04 Project - 4 error(s), 3 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Jes
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