01042006vb

PG 45 building a payroll program-1st version

Where does the C derived from?  What does it stand for?

c replaces pascal as a teaching language. Pg 11

Language called B, B came from BCPL which came from CPL which came from Algon

on page 45:

2a:  Computing the Gross Pay without tax

message box 2a  = "GROSSPAY IS"          &grosspay

2b.  Net pay= gross less tax

message box 2b  = "GROSSPAY IS"            &grosspay

message box 2b       "TAX AMOUNT IS"           &taxamount

message box 2b  = "NETPAY IS"          &netpay

Variable name NOSPACE

Outside of the quotation variable can't have space between words

Leave 10 spaces after the word "is" for formatting reasons

In payroll program we will be suing name

e.g hourlyrate, grosspay, netpay, taxamount etc

Convention of naming use lowercase without using any special characters

Case study on page 51

employeeid, hoursworked, hourlyrate, grosspay, taxamount,netpay

The above variables are input variables, case study requires these will be the output.

what goes in comes out correctly

2A:

MSG BOX  "EMPLOYEE ID   "&employeeid

MSG BOX  = "HOURS WORKED  "&hoursworked

MSG BOX "HOURLY RATE  "&hourlyrate

MSG BOX  "GROSS PAY  "&grosspay

2b

MSG BOX  "EMPLOYEE ID  "&employeeid

MSG BOX  = "HOURS WORKED  "&hoursworked

MSG BOX "HOURLY RATE   "&hourlyrate

MSG BOX  "GROSS PAY  "grosspay

MSG BOX "TAX AMOUNT  "&taxamount

MSG BOX "NET PAY  "&netpay

ORDER IS VERY IMPORTANT, therefore GROSSPAY has to be before NETPAY

Tax amount has to be before net pay.

What operation is needed for 2a?  Multiplication  Line 14, pg 45

grosspay=hoursworked*hourlyrate

Operation needed for 2B is subtraction

grosspay=hoursworked*hourlyrate

taxamount=grosspay*taxrate

netpay=grosspay-taxamount

To input data into program we are going to use inputbox

what is syntax of inputbox

inputbox : employeeid=inputbox "EMPLOYEE ID"  

THIS INPUTBOX HAS TO BE ASSIGNED TO A VARIABLE NAME=EMPLOYEE ID

1ST stage of programming is to type it.

syntax error says declaration is missing

HOW DO U DECLARE A VARIABLE NAME

START WITH A HISTORICAL WORD DIM FOLLOWED BY NAME ITSELF, FOLLOW BY THE WORD AS, FOLLOWED BY THE TYPE OF DATA (integer, single, char, double, string, etc...)

Where does the Java come from? Ans: Coffee bean, from an Island in Indonesia.
Java was known as OAK

Unix Operating System: It's opponent of Microsoft Operating system.

On page 45:

2A) Computing the Gross Pay without Tax

msgbox ("GROSSPAY IS           "&grosspay)

2B) Net pay with Tax

msgbox ("GROSSPAY IS           "&grosspay)
msgbox ("NETPAY IS           "&netpay)

Netpay has TAXAMOUNT included. (Do not leave space)
Leave 10 spaces after the word "IS" for formatting reasons

In Payroll program we will be using name

Convention of naming is that to use all lowercase without using any special characters.
 employeeid

hoursworked

 hourlyrate

the above variables are input variables, case study requires these will be the output.

problem specification

what goes in comes out. Always you need to test your input data.
Therefore,

msgbox("EMPLOYEE ID            "&employeeid)

msgbox("HOURS WORKED         "&hoursworked)

msgbox("HOURLY RATE           "&hourlyrate)

msgbox("GROSS PAY       "&grosspay)

msgbox("TAX AMOUNT        "&taxamount)

msgbox("NET PAY           "&netpay)

ORDER IS VERY IMPORTANT, therefore GROSS PAY has to be before NETPAY
tax amount has to be before net pay

What is Operation? Multiplication,

line 14 page 45,

 grosspay=hoursworked*hourlyrate

syntax error if you put X instead of * (look at page 17; mysteries of programming)

Computation for 2B

grosspay=hoursworked*hourlyrate

taxmount=grosspay*taxrate

netpay=grosspay-taxamount

to input data into program we are going to use inputbox

what is syntax of inputbox

inputbox("ENTER THE EMPLOYEE ID")

This inputbox has to be assigned to a variable name

what is the variable name that above inputbox will be assigned?

 employeeid=inputbox("EMPLOYEE ID")

Programming is not about math, its not about art, its not about science, its not about engineering, its not about sociology. Programming is all of the above.  You need science to prove what you are doing and art to make it beautiful.

Now we are going to have hands on experience which is explained in the handout.

How would we write a program using VB .Net?

case study on page 51.

Make sure to be consistent in naming. What's wrong with these two words? hoursworked and hourworked.
one has "S" other doesn't.

Variable name NO SPACE
Outside of the quotation variable can't have space between the words.

click on new project

when you see this , please smile.

double click on the form box.

The first stage of the program is to type but don't type fast.

There is a problem with this program. What is it?

we are building the solution. Click on build and hit build solution.

SYNTAX ERROR SAYS DECLARATION IS MISSING.

HOW DO YOU DECLARE A VARIABLE NAME.

START WITH A HISTORICAL WORD DIM, FOLLOWED BY NAME ITSELF, FOLLOW BY THE WORD AS, FOLLOWED BY THE TYPE OF DATA (integer,single,char,double,string, etc...)

dim employeeid as integer

integer is whole is number

single is fraction

double is fraction either is too small or too big, double room occupancy

char is one letter or one digit or one hit

string is more than one

here is the whole program

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Dim employeeid As Integer

Dim hoursworked As Integer

Dim hourlyrate As Single

Dim taxrate As Single

Dim taxamount As Integer

Dim grosspay As Single

Dim netpay As Single

'start of input data'

'start of process or computation'

'start of output'

End Sub

End Class

There is a logical error there, there is an extra spurious (extraneous line)

Final program for this payroll

Dim employeeid As Integer

Dim hoursworked As Integer

Dim hourlyrate As Single

Dim taxrate As Single

Dim taxamount As Integer

Dim grosspay As Single

Dim netpay As Single

'start of input data'

'start of process or computation'

'start of output'