HOMEWORK 7 Simple Pointers
HOMEWORK 7
SIMPLE POINTERS
Write a C program that will calculate the gross pay of a set of employees. Declare an array of structures to hold your employees as well as a pointer to it. Do not use any array references with indexes.
emp[i].wage /* this is bad, it uses an array reference with an index, in this case, i */
emp_ptr->wage; /* this is good, it uses a pointer to reference the wage value */
The program determines the overtime hours (anything over 40 hours), the gross pay and then outputs a table in the following format.
Column alignment, leading zeros in Clock#, and zero suppression in float fields is important.
Use 1.5 as the overtime pay factor.
---------------------------------------------------------_x000D_
Name Clock# Wage Hours OT Gross_x000D_
---------------------------------------------------------_x000D_
Connie Cobol 098401 10.60 51.0 11.0 598.90_x000D_
Mary Apl 526488 9.75 42.5 2.5 426.56_x000D_
Frank Fortran 765349 10.50 37.0 0.0 388.50_x000D_
Jeff Ada 034645 12.25 45.0 5.0 581.88_x000D_
Anton Pascal 127615 10.00 40.0 0.0 400.00_x000D_
---------------------------------------------------------
You should implement this program using a structure similar to the suggested one below to store the information for each employee. Feel free to tweak it if you wish. For example, its OK to have a first and last name member instead of just a name member, and if you want to use different types (such as long or double), that is OK as well.
struct employee
{
char name [20];
int id;
float wage;
float hours;
float overtime;
float gross;
};Use the following information to initialize your data.
Connie Cobol 98401 10.60
Mary Apl 526488 9.75
Frank Fortran 765349 10.50
Jeff Ada 34645 12.25
Anton Pascal 127615 10.00
Create an array of structures with 5 elements, each being of type struct employee
Initialize the array with the data provided.
Set a pointer to it and then use that pointer going forward to access elements (and their associated members) in your array of structures. Again, do not use array references with indexes.
Challenge: If you wish, optionally add code needed to generate a total and average of the hour, overtime, and gross pay values, just like you did in the previous homework.
Here is a template to use for homework 7. If you want to deviate from it, that is fine, as long as you follow the rules mentioned above. The template will compile and start printing values right out of the box. It is your job to fill in the missing code and provide input so that it displays the correct information.
/************************************************************************/_x000D_ /* */_x000D_ /* HOMEWORK: 7 */_x000D_ /* */_x000D_ /* Name: Joe Student */_x000D_ /* */_x000D_ /* Class: C Programming, Cybercourse */_x000D_ /* */_x000D_ /* Date: 6/29/2012 */_x000D_ /* */_x000D_ /* Description: Program which determines gross pay based on overtime */_x000D_ /* and outputs a formatted answer. Employee information */_x000D_ /* is stored in an array of structures and referenced */_x000D_ /* through the use of pointers. */_x000D_ /************************************************************************/_x000D_ _x000D_ #include <stdio.h>_x000D_ #include <stdlib.h>_x000D_/* define all constants here */_x000D_ #define STD_HOURS 40.0_x000D_ #define TIME_HALF 1.5_x000D_ #define SIZE 5_x000D_ _x000D_ /* type to hold employee information */_x000D_ struct employee_x000D_ {_x000D_ char name [20]; /* Employee first and last name */_x000D_ int id; /* unique employee identifier */_x000D_ float wage; /* hourly wage rate */_x000D_ float hours; /* hours worked in a given week */_x000D_ float overtime; /* hours worked after the standard work week */_x000D_ float gross; /* total gross pay, standard pay + overtime pay */_x000D_ };_x000D_ /************************************************************************/_x000D_ /* Function: getHours */_x000D_ /* */_x000D_ /* Purpose: Obtains the number of hours worked per employee from */_x000D_ /* user and stores the results in an array that is */_x000D_ /* passed back to the calling program by reference. */_x000D_ /* */_x000D_ /* Parameters: emp_ptr - pointer to array of structures */_x000D_ /* size - number of employees to process */_x000D_ /* */_x000D_ /* Returns: Nothing, since emp_ptr is passed by reference */_x000D_ /************************************************************************/_x000D_ _x000D_ void getHours ( struct employee * emp_ptr, int size )_x000D_ {_x000D_ _x000D_ }_x000D_ _x000D_ /************************************************************************/_x000D_ /* Function: calcOvertime */_x000D_ /* */_x000D_ /* Purpose: Calculates the number of overtime hours given the number*/_x000D_ /* of hours worked. Overtime hours are the number of hours */_x000D_ /* worked after 40 hrs. */_x000D_ /* */_x000D_ /* Parameters: emp_ptr - pointer to array of structures */_x000D_ /* size - number of employees to process */_x000D_ /* */_x000D_ /* Returns: Nothing, since emp_ptr is passed by reference */_x000D_ /************************************************************************/_x000D_ _x000D_ void calcOvertime ( struct employee * emp_ptr, int size )_x000D_ {_x000D_ _x000D_ }_x000D_ _x000D_ /************************************************************************/_x000D_ /* Function: calcGrossPay */_x000D_ /* */_x000D_ /* Purpose: Calculates gross pay including overtime given the number*/_x000D_ /* of hours an employee works and wage rate. */_x000D_ /* */_x000D_ /* Parameters: emp_ptr - pointer to array of structures */_x000D_ /* size - number of employees to process */_x000D_ /* */_x000D_ /* Returns: Nothing, since emp_ptr is passed by reference */_x000D_ /************************************************************************/_x000D_ _x000D_ void calcGrossPay ( struct employee * emp_ptr, int size )_x000D_ {_x000D_ _x000D_ }_x000D_ _x000D_ /************************************************************************/_x000D_ /* Function: printTable */_x000D_ /* */_x000D_ /* Purpose: Outputs to screen in a table format the following: */_x000D_ /* - Employee First and Last Name */_x000D_ /* - Employee clock number */_x000D_ /* - Wage rate for an employee. */_x000D_ /* - Total hours worked by employee. */_x000D_ /* - Overtime Hours. */_x000D_ /* - Gross Pay. */_x000D_ /* */_x000D_ /* Parameters: emp_ptr - pointer to array of structures */_x000D_ /* size - number of employees to process */_x000D_ /* */_x000D_ /* Returns: Nothing, since emp_ptr is passed by reference */_x000D_ /************************************************************************/_x000D_ _x000D_ void printTable ( struct employee * emp_ptr, int size )_x000D_ {_x000D_ int n; /* counter used in for loop to keep track of iterations */_x000D_ _x000D_ /* prints the table header to the screen */_x000D_ printf ("n-------------------------------------------------------------------n");_x000D_ printf (" Name Clock# Wage Hours OT Grossn");_x000D_ printf ("---------------------------------------------------------------------n");_x000D_ _x000D_ /* prints the output for all employees to the screen */_x000D_ for (n = 0; n < SIZE; n++)_x000D_ {_x000D_ printf ("%-20.20s %06i $%5.2f %4.1f %4.1f $%7.2f n", _x000D_ emp_ptr->name,_x000D_ emp_ptr->id, _x000D_ emp_ptr->wage, _x000D_ emp_ptr->hours, _x000D_ emp_ptr->overtime, _x000D_ emp_ptr->gross);_x000D_ _x000D_ ++emp_ptr; /* move to next employee */_x000D_ }_x000D_ printf ("n");_x000D_ }_x000D_ /************************************************************************/_x000D_ /* Function: Main */_x000D_ /************************************************************************/_x000D_ _x000D_ int main()_x000D_ {_x000D_ _x000D_ /* A structure array to hold information on employees */_x000D_ struct employee emp [SIZE] = { {"Connie Cobol", 98401, 10.60},_x000D_ {"Frank Fortran", 526488, 9.75},_x000D_ {"Mary Apl", 765349, 10.50},_x000D_ {"Jeff Ada", 34645, 12.25},_x000D_ {"Anton Pascal", 127615, 10.0}_x000D_ };_x000D_ _x000D_ /* Get user input for the hours worked for each employee */_x000D_ getHours ( emp, SIZE );_x000D_ _x000D_ /* Calculate gross pay for each employee */_x000D_ calcOvertime ( emp, SIZE );_x000D_ _x000D_ /* Calculate gross pay for each employee */_x000D_ calcGrossPay ( emp, SIZE );_x000D_ _x000D_ /* Print results to the screen */_x000D_ printTable ( emp, SIZE );_x000D_ _x000D_ return 0;_x000D_ }_x000D_
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