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Using control breaks to subtotal inputfile data

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Join Date: Jul 2009
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jko2326 jko2326 is offline Offline
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Using control breaks to subtotal inputfile data

 
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  #1
Aug 31st, 2009
For this project I am suppose to create a data file which includes this info:

Miller Ford Mustang 28000
Miller Ford Escape 23000
Miller Ford Van 32000
Sam_Car Ford Focus 17000
Sam_Car Ford Ranger 18250
Sam_Car Chev Impala 31500
Tina_Sells Chev Camero 33000
Tina_Sells Chev SUV 38000

Then I am suppose to create a program that reads in all the data but uses a control break, one that subtotals each salespersons sales. then it it suppose to display the read data including the subtotal, and earned commission which is 4% of the total sales (subtotal).
This is what I have so far, it read all the data and displays it. I just need help on how to start on the subtotaling for each seller? Can anyone show me an example or lead me in the direction to a solution for my program? Thanks.
C++ Syntax (Toggle Plain Text) 
  1. ///Preprocessive directives
  2. #include "stdafx.h"
  3. #include <iostream>
  4. #include <fstream>
  5. #include <iomanip>
  6. using namespace std;
  7.  
  8. //Prototypes
  9. void initialization();
  10. void process ();
  11. void eoj ();
  12. void openIt();
  13. void readIt(); 
  14. void writeIt();
  15. void calculateIt();
  16. void accumulateIt();
  17.  
  18. //Input Records
  19. ifstream inputFile;
  20. char sSalesPerson[15];
  21. char sMake[10]; 
  22. char sModel [10];
  23. int iSellingPrice;
  24.  
  25. //Program Variables
  26. int iEarnedCommission;
  27.  
  28.  
  29. int main()
  30. {
  31. 	cout << "\n\t\tWeekly Car Sales Report\n\n";
  32. 	cout << "Salesperson    Make        Model    Selling Price\n";
  33. 	cout << "-------------------------------------------------\n";
  34. 	initialization();
  35.  
  36. 	if (!inputFile.fail())    
  37. 	{
  38. 		process();
  39.  
  40. 	}
  41.  
  42. 	eoj();
  43.  
  44. 	return 0;
  45. }
  46.  
  47. void initialization()
  48. {
  49. 	openIt();
  50.  
  51. 	return;
  52. }
  53. void process ()
  54. {
  55. 	readIt();
  56. 	while (!inputFile.eof())
  57. 	{
  58. 		calculateIt();
  59. 		accumulateIt();
  60. 		writeIt();
  61. 		readIt();
  62. 	}
  63.  
  64.  
  65.  
  66.  
  67.  
  68. 	return;
  69. }
  70. void eoj ()
  71. {
  72.  inputFile.close();
  73.  return;
  74. }
  75. void openIt()
  76. {
  77. 	inputFile.open("c:\\auto.dat");
  78. 	if (inputFile.fail())
  79. 		cout << "AUTO file open failed" << endl;
  80. 	return;
  81.  
  82. }
  83. void readIt()
  84. {
  85.  
  86. 		inputFile >> sSalesPerson >> sMake >> sModel >> iSellingPrice;
  87.  
  88.  
  89. 	return;
  90. }
  91. void calculateIt()
  92. {
  93.  
  94. 	return;
  95.  
  96. }
  97. void accumulateIt()
  98. {  
  99.  
  100.  
  101.      return;
  102. }
  103. void writeIt()
  104. {
  105. 	cout << left << setw(15) << sSalesPerson << setw(12)<< sMake << setw(12) << sModel <<  setw(12)
  106. 		<< iSellingPrice << endl; 
  107.  
  108.  
  109.  
  110.  
  111. 	return;
  112. }
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GDICommander GDICommander is offline Offline
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Re: Using control breaks to subtotal inputfile data

 
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  #2
Aug 31st, 2009
You should pay attention to how you have divided your problem into functions.

A function like computeCommission(int price) can be useful...
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