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Nov 3rd, 2009
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Overload Boolean Comparison Operators

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I am trying to overload the Comparison Operators, to have them compare the RMR of two fitness trackers. I need to change the RMR from a double to an int for the comparison. How would I do this when the RMR is calculated by a function. Here is my code.

C++ Syntax (Toggle Plain Text)
  1. #include <iostream>
  2. #include <fstream>
  3. #include <string>
  4. #include <iomanip>
  5. #include "FitnessTracker.h" 
  6. using namespace std;
  7.  
  8. struct Activity 
  9. {
  10. 	string name;
  11.     int burnForLo; // <150lbs
  12.     int burnForMed; // 150-250
  13.     int burnForHi; // >250
  14. }info[12];
  15.  
  16. void CreateStruct(Activity info[], ifstream &Activities);
  17. void StartTracker(FitnessTracker &Tracker);
  18. char DisplayAndMenu(FitnessTracker &Tracker);
  19. void AddCalories(FitnessTracker &Tracker);
  20. void ExerciseMenu(Activity info[], int &exercise);
  21. void CalculateCalsBurned(Activity info[], int &exercise, FitnessTracker &Tracker);
  22. void EndDay(FitnessTracker &Tracker);
  23. void main()
  24. {
  25. 	char Menu;
  26. 	int exercise;
  27. 	FitnessTracker Tracker(0, 0, 0, 'M');
  28. 	ifstream Activities;
  29. 	CreateStruct(info, Activities);
  30. 	StartTracker(Tracker);
  31. 	do
  32. 	{
  33. 		Menu = DisplayAndMenu(Tracker);
  34. 		if (Menu == 'A' || Menu == 'a')
  35. 			AddCalories(Tracker);
  36. 		else if (Menu == 'D' || Menu == 'd')
  37. 		{
  38. 			ExerciseMenu(info, exercise);
  39. 			CalculateCalsBurned(info, exercise, Tracker);
  40. 		}
  41. 		else if (Menu == 'E' || Menu == 'e')
  42. 			EndDay(Tracker);
  43. 	}while (Menu != 'Q' && Menu != 'q');
  44. }
  45. void CreateStruct(Activity info[], ifstream &Activities)
  46. {
  47. 	int i;
  48. 	Activities.open("exerciseTotals.txt");
  49.  
  50. 	for (i=0; i<12; i++)
  51. 	{
  52. 		Activities >> info[i].name >> info[i].burnForLo >> info[i].burnForMed >> info[i].burnForHi;
  53. 	}
  54. }
  55. void StartTracker(FitnessTracker &Tracker)
  56. {
  57. 	cout << endl << "     Welcome to the Fitness Tracker!" << endl << endl;          
  58. 	Tracker.intializeAge();
  59. 	Tracker.intializeHeight();
  60. 	Tracker.intializeWeight();
  61. 	Tracker.intializeGender();
  62. 	cout << "Thank you, let's begin." << endl;
  63. 	system("pause");
  64. 	system("cls");
  65. }
  66. char DisplayAndMenu(FitnessTracker &Tracker)
  67. {
  68. 	char Menu;
  69. 	cout << Tracker;
  70. 	cout << endl << "Please select an option:" << endl
  71. 		<< "A)dd Calories Eaten" << endl
  72. 		<< "D)o Some Exercise" << endl
  73. 		<< "E)nd The Day" << endl
  74. 		<< "Q)uit" << endl
  75. 		<< "Your choice? ";
  76. 	cin >> Menu;
  77. 	while ((Menu != 'A') && (Menu != 'a') && (Menu != 'D') && (Menu != 'd') && (Menu != 'E') &&
  78. 			(Menu != 'e') && (Menu != 'Q') && (Menu != 'q'))
  79. 	{
  80. 		cout << "That is not a valid option. Please try again: ";
  81. 		cin >> Menu;
  82. 	}
  83. 	return Menu;
  84. }
  85. void AddCalories(FitnessTracker &Tracker)
  86. {
  87. 	int Calories;
  88. 	cout << "How many calories did you eat? ";
  89. 	cin >> Calories;
  90. 	while (Calories < 0)
  91. 	{
  92. 		cout << "You cannot eat fewer than zero calories! Try again." << endl
  93. 			<< "How many calories did you eat? ";
  94. 		cin >> Calories;
  95. 	}
  96. 	Tracker.AddCaloriesConsumed(Calories);
  97. 	cout << endl << "*****************" << endl
  98. 		<< "  " << Calories << " calories added" << endl
  99. 		<< "*****************" << endl << endl;
  100. }
  101. void ExerciseMenu(Activity info[], int &exercise)
  102. {
  103. 	int i;
  104. 	do 
  105. 	{
  106. 		cout << "Please choose an exercise from the list:" << endl;
  107. 		for (i=0; i<12; i++)
  108. 		{
  109. 			cout << i+1 << ") " << info[i].name << endl;
  110. 		} 
  111. 		cout << "13.) None." << endl;
  112. 		cin >> exercise;
  113. 	}while ((exercise < 1) || (exercise > 13));
  114. }
  115. void CalculateCalsBurned(Activity info[], int &exercise, FitnessTracker &Tracker)
  116. {
  117. 	int CalsBurned;
  118.  
  119. 	if (Tracker.getWeight() < 150)
  120. 		CalsBurned = info[exercise-1].burnForLo;
  121. 	else if ((Tracker.getWeight() >= 150) && (Tracker.getWeight() <= 250))
  122. 		CalsBurned = info[exercise-1].burnForMed;
  123. 	else
  124. 		CalsBurned = info[exercise-1].burnForHi;
  125.  
  126. 	cout << endl << "*****************" << endl 
  127. 		 << "   " << CalsBurned << " calories burned" << endl
  128. 		 << "*****************" << endl;
  129. 	Tracker.AddCaloriesBurned(CalsBurned);
  130. }
  131. void EndDay(FitnessTracker &Tracker)
  132. {
  133. 	cout << endl << "**************End of Day**************" << endl;
  134. 	if (Tracker.AdjustWeight() < 0)
  135. 		cout << "You lost " << (Tracker.AdjustWeight()*-1) << " pounds" << endl;
  136. 	else if (Tracker.AdjustWeight() > 0)
  137. 		cout << "You gained" << Tracker.AdjustWeight() << "pounds" << endl;
  138. 	cout << "**************End of Day**************" << endl << endl;
  139. 	Tracker.setCaloriesBurned(0);
  140. 	Tracker.setCaloriesConsumed(0);
  141. 	Tracker.setWeight(Tracker.getWeight()+Tracker.AdjustWeight());
  142. }

C++ Syntax (Toggle Plain Text)
  1. // FitnessTracker.cpp
  2. #include <iostream>
  3. #include <iomanip>
  4. #include "FitnessTracker.h"
  5. using namespace std;
  6.  
  7. // constructors:
  8. FitnessTracker::FitnessTracker()
  9. {
  10. }
  11. FitnessTracker::FitnessTracker(int A, int H, int W, char G)
  12. {
  13.     Age = A;
  14.     Height = H;
  15.     Weight = W;
  16.     Gender = G;
  17. 	CaloriesBurned = 0;
  18. 	CaloriesConsumed = 0;
  19. }
  20.  
  21. // Overloaded Operators 
  22. ostream & operator << (ostream &os, FitnessTracker &Tracker)
  23. {
  24. 	 os << "Age:           " <<  Tracker.Age << endl
  25. 		<< "Gender:        " << Tracker.Gender << endl
  26. 		<< "Weight:        " << Tracker.Weight << endl
  27. 		<< "Height:        " << Tracker.Height << endl
  28. 		<< "RMR:           " << Tracker.RMR() << endl
  29. 		<< "Cals Burned:   " << Tracker.CaloriesBurned + Tracker.RMR() << endl
  30. 		<< "Cals Consumed: " << Tracker.CaloriesConsumed << endl
  31. 		<< "Calorie Difference: " << Tracker.CalorieDifference() << endl;
  32. return os;
  33. }
  34.  
  35.  
  36.  
  37. // utility functions:
  38. double FitnessTracker::RMR()
  39. {
  40. 	if (getGender() == 'M')
  41. 		return (66+(6.22*getWeight())+(12.7*getHeight())-(6.8*getAge()));
  42. 	else
  43. 		return (655+(4.36*getWeight())+(4.32*getHeight())-(4.7*getAge()));
  44. }
  45. int FitnessTracker::CalorieDifference()
  46. {
  47. 	return (getCaloriesConsumed()-(getCaloriesBurned()+RMR()));
  48. }
  49. double FitnessTracker::AdjustWeight()
  50. {
  51. 	return (CalorieDifference()/3500.0);
  52. }
  53.  
  54. // intializing functions
  55. void FitnessTracker::intializeAge()
  56. {
  57. 	int Age;
  58. 	cout << "Please enter your Age: ";
  59. 	cin >> Age;
  60. 	setAge(Age);
  61. 	while (setAge(Age) == false)
  62. 	{
  63. 		cout << "That Age is not valid, please enter your Age again: ";
  64. 		cin >> Age;
  65. 		setAge(Age);
  66. 	}
  67. }
  68. void FitnessTracker::intializeHeight()
  69. {
  70. 	double Height;
  71. 	cout << "Please enter your Height: ";
  72. 	cin >> Height;
  73. 	setHeight(Height);
  74. 	while (setHeight(Height) == false)
  75. 	{
  76. 		cout << "That Height is not valid, please enter your Height again: ";
  77. 		cin >> Height;
  78. 		setHeight(Height);
  79. 	}
  80. }
  81. void FitnessTracker::intializeWeight()
  82. {
  83. 	double Weight;
  84. 	cout << "Please enter your Weight: ";
  85. 	cin >> Weight;
  86. 	setWeight(Weight);
  87. 	while (setWeight(Weight) == false)
  88. 	{
  89. 		cout << "That Weight is not valid, please enter your Weight again: ";
  90. 		cin >> Weight;
  91. 		setWeight(Weight);
  92. 	}
  93. }
  94. void FitnessTracker::intializeGender()
  95. {
  96. 	char Gender;
  97. 	cout << "Please enter your Gender (M or F): ";
  98. 	cin >> Gender;
  99. 	setGender(Gender);
  100. 	while (setGender(Gender) == false)
  101. 	{
  102. 		cout << "That Gender is not valid, please enter your Gender (M or F) again: ";
  103. 		cin >> Gender;
  104. 		setGender(Gender);
  105. 	}
  106. }
  107. // mutators:
  108. bool FitnessTracker::setAge(int A)
  109. {
  110.     if(A <= 0) return false;
  111.  
  112.     Age = A;
  113.     return true;
  114. }
  115. bool FitnessTracker::setHeight(double H)
  116. {
  117.     if(H <= 0) return false;
  118.  
  119.     Height = H;
  120.     return true;
  121. }
  122. bool FitnessTracker::setWeight(double W)
  123. {
  124.     if(W <= 0) return false;
  125.  
  126.     Weight = W;
  127.     return true;
  128. }
  129. bool FitnessTracker::setGender(char G)
  130. {
  131.     if(G == 'm' || G == 'M') 
  132. 	{
  133. 		Gender = 'M';
  134. 		return true;
  135. 	}
  136. 	else if(G == 'f' || G == 'F')
  137. 	{
  138. 		Gender = 'F';
  139. 		return true;
  140. 	}
  141. 	return false;
  142. }
  143. bool FitnessTracker::setCaloriesBurned(int CB)
  144. {
  145. 	if (CB < 0) return false;
  146. 	CaloriesBurned = CB;
  147. 	return true;
  148. }
  149. void FitnessTracker::AddCaloriesBurned(int CB)
  150. {
  151. 	CaloriesBurned = getCaloriesBurned() + CB;
  152. }
  153. bool FitnessTracker::setCaloriesConsumed(int CC)
  154. {
  155. 	if (CC < 0) return false;
  156. 	CaloriesConsumed = CC;
  157. 	return true;
  158. }
  159. void FitnessTracker::AddCaloriesConsumed(int CC)
  160. {
  161. 	CaloriesConsumed = getCaloriesConsumed() + CC;
  162. }
  163. // accessors:
  164. int FitnessTracker::getAge()
  165. {
  166.     return Age;
  167. }
  168. double FitnessTracker::getHeight()
  169. {
  170.     return Height;
  171. }
  172. double FitnessTracker::getWeight()
  173. {
  174. 	return Weight;
  175. }
  176. char FitnessTracker::getGender()
  177. {
  178. 	return Gender;
  179. }
  180. int FitnessTracker::getCaloriesBurned()
  181. {
  182. 	return CaloriesBurned;
  183. }
  184. int FitnessTracker::getCaloriesConsumed()
  185. {
  186. 	return CaloriesConsumed;
  187. }

C++ Syntax (Toggle Plain Text)
  1. // FitnessTracker.h 
  2. #ifndef FitnessTracker_H
  3. #define FitnessTracker_H
  4. #include <iostream>
  5. using namespace std;
  6.  
  7. class FitnessTracker
  8. {
  9. public:
  10.     // constructors:
  11.     FitnessTracker();
  12. 	FitnessTracker(int A, int H, int W, char G);
  13.  
  14.     // accessors:
  15.     int getAge();
  16.     double getHeight();
  17.     double getWeight();
  18.     char getGender();
  19. 	int getCaloriesBurned();
  20. 	int getCaloriesConsumed();
  21.  
  22.  
  23.     // mutators:
  24.     bool setAge(int A);
  25.     bool setHeight(double H);
  26.     bool setWeight(double W);
  27.     bool setGender(char G);
  28. 	bool setCaloriesBurned(int CB);
  29. 	void AddCaloriesBurned(int CB);
  30. 	bool setCaloriesConsumed(int CC);
  31. 	void AddCaloriesConsumed(int CC);
  32.  
  33.     // utility functions:
  34.     void display();
  35. 	double RMR();
  36. 	int CalorieDifference();
  37. 	double AdjustWeight();
  38. 	void intializeAge();
  39. 	void intializeHeight();
  40. 	void intializeWeight();
  41. 	void intializeGender();
  42.  
  43. 	// Friend Functions
  44. 	friend ostream & operator<<(ostream& , FitnessTracker&);
  45.  
  46.  
  47. // private:
  48.     int Age;
  49.     double Height;
  50.     double Weight;
  51.     char Gender;
  52. 	int CaloriesBurned;
  53. 	int CaloriesConsumed;
  54. };
  55.  
  56. #endif
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