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  1. //********************************************************
  2. //
  3. // Assignment 10 - Linked Lists, Typedef, and Macros
  4. //
  5. // Name: <replace with your name>
  6. //
  7. // Class: C Programming, <replace with Semester and Year>
  8. //
  9. // Date: <replace with the current date>
  10. //
  11. // Description: Program which determines overtime and 
  12. // gross pay for a set of employees with outputs sent 
  13. // to standard output (the screen).
  14. //
  15. // This assignment also adds the employee name, their tax state,
  16. // and calculates the state tax, federal tax, and net pay.   It
  17. // also calculates totals, averages, minimum, and maximum values.
  18. //
  19. // Array and Structure references have all been replaced with
  20. // pointer references to speed up the processing of this code.
  21. // A linked list has been created and deployed to dynamically
  22. // allocate and process employees as needed.
  23. //
  24. // It will also take advantage of the C Preprocessor features,
  25. // in particular with using macros, and will replace all 
  26. // struct type references in the code with a typedef alias
  27. // reference.
  28. //
  29. // Call by Reference design (using pointers)
  30. //
  31. //********************************************************
  32.  
  33. // necessary header files
  34. #include <stdio.h>
  35. #include <string.h>
  36. #include <ctype.h>   // for char functions
  37. #include <stdlib.h>  // for malloc
  38.  
  39. // define constants
  40. #define STD_HOURS 40.0
  41. #define OT_RATE 1.5
  42. #define MA_TAX_RATE 0.05
  43. #define NH_TAX_RATE 0.0
  44. #define VT_TAX_RATE 0.06
  45. #define CA_TAX_RATE 0.07
  46. #define DEFAULT_STATE_TAX_RATE 0.08
  47. #define NAME_SIZE 20
  48. #define TAX_STATE_SIZE 3
  49. #define FED_TAX_RATE 0.25
  50. #define FIRST_NAME_SIZE 10
  51. #define LAST_NAME_SIZE 10
  52.  
  53. // define macros
  54. #define CALC_OT_HOURS(theHours) ((theHours > STD_HOURS) ? theHours - STD_HOURS : 0)
  55. #define CALC_STATE_TAX(thePay,theStateTaxRate) (thePay * theStateTaxRate)
  56. #define CALC_FED_TAX(thePay) (thePay * FED_TAX_RATE)
  57. #define CALC_NET_PAY(thePay,theStateTax,theFedTax) (thePay - (theStateTax + theFedTax))
  58. #define CALC_NORMAL_PAY(theWageRate,theHours,theOvertimeHrs) \
  59. (theWageRate * (theHours - theOvertimeHrs))
  60. #define CALC_OT_PAY(theWageRate,theOvertimeHrs) (theOvertimeHrs * (OT_RATE * theWageRate))
  61. #define CALC_MIN(theValue, currentMin) ((theValue < currentMin) ? theValue : currentMin)
  62. #define CALC_MAX(theValue, currentMax) ((theValue > currentMax) ? theValue : currentMax)
  63.  
  64. // Define a global structure type to store an employee name
  65. struct name
  66. {
  67.     char firstName[FIRST_NAME_SIZE];
  68.     char lastName [LAST_NAME_SIZE];
  69. };
  70.  
  71. // Define a global structure type to pass employee data between functions
  72. typedef struct employee
  73. {
  74.     struct name empName;
  75.     char taxState [TAX_STATE_SIZE];
  76.     long int clockNumber;
  77.     float wageRate;
  78.     float hours;
  79.     float overtimeHrs;
  80.     float grossPay;
  81.     float stateTax;
  82.     float fedTax;
  83.     float netPay;
  84.     struct employee * next;
  85. } EMPLOYEE;
  86.  
  87. // This structure type defines the totals of all floating point items
  88. typedef struct totals
  89. {
  90.     float total_wageRate;
  91.     float total_hours;
  92.     float total_overtimeHrs;
  93.     float total_grossPay;
  94.     float total_stateTax;
  95.     float total_fedTax;
  96.     float total_netPay;
  97. } TOTALS;
  98.  
  99. // This structure type defines the min and max values
  100. typedef struct min_max
  101. {
  102.     float min_wageRate;
  103.     float min_hours;
  104.     float min_overtimeHrs;
  105.     float min_grossPay;
  106.     float min_stateTax;
  107.     float min_fedTax;
  108.     float min_netPay;
  109.     float max_wageRate;
  110.     float max_hours;
  111.     float max_overtimeHrs;
  112.     float max_grossPay;
  113.     float max_stateTax;
  114.     float max_fedTax;
  115.     float max_netPay;
  116. } MIN_MAX;
  117.  
  118. // Define prototypes here for each function except main
  119. EMPLOYEE * getEmpData (void);
  120. int isEmployeeSize (EMPLOYEE * head_ptr);
  121. void calcOvertimeHrs (EMPLOYEE * head_ptr);
  122. void calcGrossPay (EMPLOYEE * head_ptr);
  123. void printHeader (void);
  124. void printEmp (EMPLOYEE * head_ptr);
  125. void calcStateTax (EMPLOYEE * head_ptr);
  126. void calcFedTax (EMPLOYEE * head_ptr);
  127. void calcNetPay (EMPLOYEE * head_ptr);
  128. void calcEmployeeTotals (EMPLOYEE * head_ptr,
  129.                          TOTALS * emp_totals_ptr);
  130. void calcEmployeeMinMax (EMPLOYEE * head_ptr,
  131.                          MIN_MAX * emp_minMax_ptr);
  132. void printEmpStatistics (TOTALS * emp_totals_ptr, 
  133.                          MIN_MAX * emp_minMax_ptr,
  134.                          int size);
  135.  
  136. int main ()
  137. {
  138.     EMPLOYEE * head_ptr; // always points to first linked list node
  139.  
  140.     int theSize; // number of employees processed
  141.  
  142.     // set up structure to store totals and initialize all to zero
  143.     TOTALS employeeTotals  = {0,0,0,0,0,0,0};
  144.  
  145.     // pointer to the employeeTotals structure
  146.     TOTALS * emp_totals_ptr = &employeeTotals;
  147.  
  148.     // set up structure to store min and max values and initialize all to zero
  149.     MIN_MAX employeeMinMax = {0,0,0,0,0,0,0,0,0,0,0,0,0,0};
  150.  
  151.     // pointer to the employeeMinMax structure
  152.     MIN_MAX * emp_minMax_ptr = &employeeMinMax;
  153.  
  154.     head_ptr = getEmpData ();
  155.  
  156.     theSize = isEmployeeSize (head_ptr);
  157.  
  158.     if (theSize <= 0)
  159.     {
  160.         printf("\n\n**** There was no employee input to process ***\n");
  161.     }
  162.     else
  163.     {    
  164.         calcOvertimeHrs (head_ptr);
  165.         calcGrossPay (head_ptr); 
  166.         calcStateTax (head_ptr);
  167.         calcFedTax (head_ptr);
  168.         calcNetPay (head_ptr); 
  169.         calcEmployeeTotals (head_ptr, &employeeTotals);
  170.         calcEmployeeMinMax (head_ptr, &employeeMinMax);
  171.         printHeader();
  172.         printEmp (head_ptr); 
  173.         printEmpStatistics (&employeeTotals, &employeeMinMax, theSize);
  174.     }
  175.  
  176.     printf ("\n\n *** End of Program *** \n");
  177.  
  178.     return (0);
  179.  
  180. } // main
  181.  
  182. //**************************************************************
  183. // Function: getEmpData 
  184. //**************************************************************
  185. EMPLOYEE * getEmpData (void)
  186. {
  187.     char   answer[80];
  188.     int    more_data = 1;
  189.     char   value;
  190.  
  191.     EMPLOYEE *current_ptr,
  192.              *head_ptr;
  193.  
  194.     head_ptr = (EMPLOYEE *) malloc (sizeof(EMPLOYEE));
  195.     current_ptr = head_ptr;
  196.  
  197.     while (more_data)
  198.     {
  199.         printf ("\nEnter employee first name: ");
  200.         scanf ("%s", current_ptr->empName.firstName);
  201.  
  202.         printf ("\nEnter employee last name: ");
  203.         scanf ("%s", current_ptr->empName.lastName);
  204.  
  205.         printf ("\nEnter employee two character tax state: ");
  206.         scanf ("%s", current_ptr->taxState);
  207.  
  208.         printf("\nEnter employee clock number: ");
  209.         scanf("%li", &current_ptr->clockNumber);
  210.  
  211.         printf("\nEnter employee hourly wage: ");
  212.         scanf("%f", &current_ptr->wageRate);
  213.  
  214.         printf("\nEnter hours worked this week: ");
  215.         scanf("%f", &current_ptr->hours);
  216.  
  217.         printf("\nWould you like to add another employee? (y/n): ");
  218.         scanf("%s", answer);
  219.  
  220.         if ((value = toupper(answer[0])) != 'Y')
  221.         {
  222.            current_ptr->next = (EMPLOYEE *) NULL;
  223.            more_data = 0; 
  224.         }
  225.         else
  226.         {
  227.            current_ptr->next = (EMPLOYEE *) malloc (sizeof(EMPLOYEE));
  228.            current_ptr = current_ptr->next;
  229.         }
  230.  
  231.     } // while
  232.  
  233.     return(head_ptr);
  234.  
  235. } // getEmpData
  236.  
  237. //**************************************************************
  238. // Function: isEmployeeSize
  239. //**************************************************************
  240. int isEmployeeSize (EMPLOYEE * head_ptr)
  241. {
  242.     EMPLOYEE * current_ptr;
  243.     int theSize;
  244.  
  245.     theSize = 0;
  246.  
  247.     if (head_ptr->empName.firstName[0] != '\0')
  248.     {
  249.         for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  250.         {  
  251.             ++theSize;
  252.         }
  253.     }
  254.  
  255.     return (theSize);
  256.  
  257. } // isEmployeeSize
  258.  
  259. //**************************************************************
  260. // Function: printHeader
  261. //**************************************************************
  262. void printHeader (void) 
  263. { 
  264.     printf ("\n\n*** Pay Calculator ***\n");
  265.  
  266.     printf("\n--------------------------------------------------------------");
  267.     printf("-------------------");
  268.     printf("\nName                Tax  Clock# Wage   Hours  OT   Gross ");
  269.     printf("  State  Fed      Net");
  270.     printf("\n                   State                           Pay   ");
  271.     printf("  Tax    Tax      Pay");
  272.     printf("\n--------------------------------------------------------------");
  273.     printf("-------------------");
  274.  
  275. } // printHeader
  276.  
  277. //**************************************************************
  278. // Function: printEmp
  279. //**************************************************************
  280. void printEmp (EMPLOYEE * head_ptr)
  281. {
  282.     char name [FIRST_NAME_SIZE + LAST_NAME_SIZE + 1];
  283.     EMPLOYEE * current_ptr;
  284.  
  285.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  286.     {
  287.         strcpy (name, current_ptr->empName.firstName);
  288.         strcat (name, " ");
  289.         strcat (name, current_ptr->empName.lastName);
  290.  
  291.         printf("\n%-20.20s %-2.2s  %06li %5.2f  %4.1f  %4.1f %7.2f %6.2f %7.2f %8.2f",
  292.                name, current_ptr->taxState, current_ptr->clockNumber, 
  293.                current_ptr->wageRate, current_ptr->hours,
  294.                current_ptr->overtimeHrs, current_ptr->grossPay, 
  295.                current_ptr->stateTax, current_ptr->fedTax, 
  296.                current_ptr->netPay);
  297.     }
  298.  
  299. } // printEmp
  300.  
  301. //**************************************************************
  302. // Function: printEmpStatistics
  303. //**************************************************************
  304. void printEmpStatistics (TOTALS  * emp_totals_ptr,
  305.                          MIN_MAX * emp_minMax_ptr,
  306.                          int theSize)
  307. {
  308.     printf("\n--------------------------------------------------------------");
  309.     printf("-------------------");
  310.  
  311.     printf("\nTotals:                         %5.2f %5.1f %5.1f %7.2f %6.2f %7.2f %8.2f",
  312.            emp_totals_ptr->total_wageRate,
  313.            emp_totals_ptr->total_hours,
  314.            emp_totals_ptr->total_overtimeHrs,
  315.            emp_totals_ptr->total_grossPay,
  316.            emp_totals_ptr->total_stateTax,
  317.            emp_totals_ptr->total_fedTax,
  318.            emp_totals_ptr->total_netPay);
  319.  
  320.     if (theSize > 0)       
  321.     {
  322.         printf("\nAverages:                       %5.2f %5.1f %5.1f %7.2f %6.2f %7.2f %8.2f",
  323.                emp_totals_ptr->total_wageRate/theSize,
  324.                emp_totals_ptr->total_hours/theSize,
  325.                emp_totals_ptr->total_overtimeHrs/theSize,
  326.                emp_totals_ptr->total_grossPay/theSize,
  327.                emp_totals_ptr->total_stateTax/theSize,
  328.                emp_totals_ptr->total_fedTax/theSize,
  329.                emp_totals_ptr->total_netPay/theSize);
  330.     }
  331.  
  332.     printf("\nMinimum:                        %5.2f %5.1f %5.1f %7.2f %6.2f %7.2f %8.2f",
  333.            emp_minMax_ptr->min_wageRate,
  334.            emp_minMax_ptr->min_hours,
  335.            emp_minMax_ptr->min_overtimeHrs,
  336.            emp_minMax_ptr->min_grossPay,
  337.            emp_minMax_ptr->min_stateTax,
  338.            emp_minMax_ptr->min_fedTax,
  339.            emp_minMax_ptr->min_netPay);
  340.  
  341.     printf("\nMaximum:                        %5.2f %5.1f %5.1f %7.2f %6.2f %7.2f %8.2f",
  342.            emp_minMax_ptr->max_wageRate,
  343.            emp_minMax_ptr->max_hours,
  344.            emp_minMax_ptr->max_overtimeHrs,
  345.            emp_minMax_ptr->max_grossPay,
  346.            emp_minMax_ptr->max_stateTax,
  347.            emp_minMax_ptr->max_fedTax,
  348.            emp_minMax_ptr->max_netPay);
  349.  
  350.     printf ("\n\nThe total employees processed was: %i\n", theSize);
  351.  
  352. }  // printEmpStatistics
  353.  
  354. //**************************************************************
  355. // Function: calcOvertimeHrs
  356. //**************************************************************
  357. void calcOvertimeHrs (EMPLOYEE * head_ptr)
  358. {
  359.     EMPLOYEE * current_ptr;
  360.  
  361.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  362.     {  
  363.         current_ptr->overtimeHrs = CALC_OT_HOURS(current_ptr->hours);
  364.     }
  365.  
  366. } // calcOvertimeHrs
  367.  
  368. //**************************************************************
  369. // Function: calcGrossPay
  370. //**************************************************************
  371. void calcGrossPay (EMPLOYEE * head_ptr)
  372. {
  373.     float theNormalPay;
  374.     float theOvertimePay;
  375.  
  376.     EMPLOYEE * current_ptr;
  377.  
  378.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  379.     {
  380.         theNormalPay = CALC_NORMAL_PAY(current_ptr->wageRate,
  381.                                        current_ptr->hours,
  382.                                        current_ptr->overtimeHrs);
  383.  
  384.         theOvertimePay = CALC_OT_PAY(current_ptr->wageRate,
  385.                                      current_ptr->overtimeHrs);
  386.  
  387.         current_ptr->grossPay = theNormalPay + theOvertimePay;
  388.     }
  389.  
  390. } // calcGrossPay
  391.  
  392. //**************************************************************
  393. // Function: calcStateTax
  394. //**************************************************************
  395. void calcStateTax (EMPLOYEE * head_ptr)
  396. {
  397.     EMPLOYEE * current_ptr;
  398.  
  399.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  400.     {
  401.         if (islower(current_ptr->taxState[0]))
  402.             current_ptr->taxState[0] = toupper(current_ptr->taxState[0]);
  403.         if (islower(current_ptr->taxState[1]))
  404.             current_ptr->taxState[1] = toupper(current_ptr->taxState[1]);
  405.  
  406.         if (strcmp(current_ptr->taxState, "MA") == 0)
  407.             current_ptr->stateTax = CALC_STATE_TAX(current_ptr->grossPay,
  408.                                                    MA_TAX_RATE);
  409.         else if (strcmp(current_ptr->taxState, "VT") == 0)
  410.             current_ptr->stateTax = CALC_STATE_TAX(current_ptr->grossPay,
  411.                                                    VT_TAX_RATE);
  412.         else if (strcmp(current_ptr->taxState, "NH") == 0)
  413.             current_ptr->stateTax = CALC_STATE_TAX(current_ptr->grossPay,
  414.                                                    NH_TAX_RATE);
  415.         else if (strcmp(current_ptr->taxState, "CA") == 0)
  416.             current_ptr->stateTax = CALC_STATE_TAX(current_ptr->grossPay,
  417.                                                    CA_TAX_RATE);
  418.         else
  419.             current_ptr->stateTax = CALC_STATE_TAX(current_ptr->grossPay,
  420.                                                    DEFAULT_STATE_TAX_RATE);
  421.     }
  422.  
  423. } // calcStateTax
  424.  
  425. //**************************************************************
  426. // Function: calcFedTax
  427. //**************************************************************
  428. void calcFedTax (EMPLOYEE * head_ptr)
  429. {
  430.     EMPLOYEE * current_ptr;
  431.  
  432.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  433.     {
  434.         current_ptr->fedTax = CALC_FED_TAX(current_ptr->grossPay);
  435.     }
  436.  
  437. } // calcFedTax
  438.  
  439. //**************************************************************
  440. // Function: calcNetPay
  441. //**************************************************************
  442. void calcNetPay (EMPLOYEE * head_ptr)
  443. {
  444.     EMPLOYEE * current_ptr;
  445.  
  446.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  447.     {
  448.         current_ptr->netPay = CALC_NET_PAY(current_ptr->grossPay,
  449.                                            current_ptr->stateTax,
  450.                                            current_ptr->fedTax);
  451.     }
  452.  
  453. } // calcNetPay
  454.  
  455. //**************************************************************
  456. // Function: calcEmployeeTotals
  457. //**************************************************************
  458. void calcEmployeeTotals (EMPLOYEE * head_ptr,
  459.                          TOTALS   * emp_totals_ptr)
  460. {
  461.     EMPLOYEE * current_ptr;
  462.  
  463.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  464.     {
  465.         emp_totals_ptr->total_wageRate += current_ptr->wageRate;
  466.         emp_totals_ptr->total_hours += current_ptr->hours;
  467.         emp_totals_ptr->total_overtimeHrs += current_ptr->overtimeHrs;
  468.         emp_totals_ptr->total_grossPay += current_ptr->grossPay;
  469.         emp_totals_ptr->total_stateTax += current_ptr->stateTax;
  470.         emp_totals_ptr->total_fedTax += current_ptr->fedTax;
  471.         emp_totals_ptr->total_netPay += current_ptr->netPay;
  472.     }
  473.  
  474. } // calcEmployeeTotals
  475.  
  476. //**************************************************************
  477. // Function: calcEmployeeMinMax
  478. //**************************************************************
  479. void calcEmployeeMinMax (EMPLOYEE * head_ptr,
  480.                          MIN_MAX  * emp_minMax_ptr)
  481. {
  482.     EMPLOYEE * current_ptr;
  483.  
  484.     current_ptr = head_ptr;
  485.  
  486.     emp_minMax_ptr->min_wageRate = current_ptr->wageRate; 
  487.     emp_minMax_ptr->min_hours = current_ptr->hours;
  488.     emp_minMax_ptr->min_overtimeHrs = current_ptr->overtimeHrs; 
  489.     emp_minMax_ptr->min_grossPay = current_ptr->grossPay;
  490.     emp_minMax_ptr->min_stateTax = current_ptr->stateTax;
  491.     emp_minMax_ptr->min_fedTax = current_ptr->fedTax;
  492.     emp_minMax_ptr->min_netPay = current_ptr->netPay;
  493.  
  494.     emp_minMax_ptr->max_wageRate = current_ptr->wageRate; 
  495.     emp_minMax_ptr->max_hours = current_ptr->hours;
  496.     emp_minMax_ptr->max_overtimeHrs = current_ptr->overtimeHrs;
  497.     emp_minMax_ptr->max_grossPay = current_ptr->grossPay;
  498.     emp_minMax_ptr->max_stateTax = current_ptr->stateTax;
  499.     emp_minMax_ptr->max_fedTax = current_ptr->fedTax;
  500.     emp_minMax_ptr->max_netPay = current_ptr->netPay;
  501.  
  502.     current_ptr = current_ptr->next;
  503.  
  504.     for (; current_ptr; current_ptr = current_ptr->next) 
  505.     {
  506.         emp_minMax_ptr->min_wageRate = 
  507.            CALC_MIN(current_ptr->wageRate, emp_minMax_ptr->min_wageRate);
  508.         emp_minMax_ptr->max_wageRate = 
  509.            CALC_MAX(current_ptr->wageRate, emp_minMax_ptr->max_wageRate);
  510.  
  511.         emp_minMax_ptr->min_hours = 
  512.            CALC_MIN(current_ptr->hours, emp_minMax_ptr->min_hours);
  513.         emp_minMax_ptr->max_hours = 
  514.            CALC_MAX(current_ptr->hours, emp_minMax_ptr->max_hours);       
  515.  
  516.         emp_minMax_ptr->min_overtimeHrs = 
  517.            CALC_MIN(current_ptr->overtimeHrs, emp_minMax_ptr->min_overtimeHrs);
  518.         emp_minMax_ptr->max_overtimeHrs = 
  519.            CALC_MAX(current_ptr->overtimeHrs, emp_minMax_ptr->max_overtimeHrs);
  520.  
  521.         emp_minMax_ptr->min_grossPay = 
  522.            CALC_MIN(current_ptr->grossPay, emp_minMax_ptr->min_grossPay);
  523.         emp_minMax_ptr->max_grossPay = 
  524.            CALC_MAX(current_ptr->grossPay, emp_minMax_ptr->max_grossPay);
  525.  
  526.         emp_minMax_ptr->min_stateTax = 
  527.            CALC_MIN(current_ptr->stateTax, emp_minMax_ptr->min_stateTax);
  528.         emp_minMax_ptr->max_stateTax = 
  529.            CALC_MAX(current_ptr->stateTax, emp_minMax_ptr->max_stateTax);
  530.  
  531.         emp_minMax_ptr->min_fedTax = 
  532.            CALC_MIN(current_ptr->fedTax, emp_minMax_ptr->min_fedTax);
  533.         emp_minMax_ptr->max_fedTax = 
  534.            CALC_MAX(current_ptr->fedTax, emp_minMax_ptr->max_fedTax);
  535.  
  536.         emp_minMax_ptr->min_netPay = 
  537.            CALC_MIN(current_ptr->netPay, emp_minMax_ptr->min_netPay);
  538.         emp_minMax_ptr->max_netPay = 
  539.            CALC_MAX(current_ptr->netPay, emp_minMax_ptr->max_netPay);
  540.     }
  541.  
  542. } // calcEmployeeMinMax
Success #stdin #stdout 0s 5324KB
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stdin
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Standard input is empty
stdout
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Enter employee first name: 
Enter employee last name: 
Enter employee two character tax state: 
Enter employee clock number: 
Enter employee hourly wage: 
Enter hours worked this week: 
Would you like to add another employee? (y/n): 

**** There was no employee input to process ***


 *** End of Program ***
https://ideone.com/kTpsoe
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

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