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Help with Classes !!! (Homework)

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Help with Classes !!! (Homework)

 
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  #1
Jul 23rd, 2005
I am doing an assignment that has to use a class dayType.
The program has to set the day, print the day and return the next day.
I am receiving the error:
--------------------Configuration: Program9 - Win32 Debug--------------------
Compiling...
Program9.cpp
C:\Documents and Settings\Faculdade\ISM3232\Assig9\Program9\Program9.cpp(45) : error C2447: missing function header (old-style formal list?)
Error executing cl.exe.

Program9.exe - 1 error(s), 0 warning(s)

Can somebody help me please ?
I am reading the book 100 times but can figure out what is happening.
Thanks a lot



C++ Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. #include <string>
  3.  
  4. using namespace std;
  5.  
  6. class dayType
  7. {
  8. public:
  9.     void setDay(char day);
  10.     void nextDay();
  11.     void printDay() const;
  12.  
  13. private:
  14.     string dayofweek[7];
  15.     int current;
  16.     char userEntry;
  17. };
  18.  
  19. int main();
  20. {
  21. 	dayType myDay;
  22. 	char day;
  23.  
  24. 	cout << "Please enter M for Monday, T for Tuesday, W for Wednesday" << endl;
  25. 	cout << "R for Thursday, F for Friday, S for Saturday or U for Sunday" << endl;
  26. 	cout << endl;
  27.  
  28. 	cin >> day;  
  29.  
  30. 	myDay.setDay(day); // set the day
  31. 	cout << endl;
  32. 	myDay.printDay() const; // print the day
  33. 	cout << endl;
  34. 	myDay.nextDay(); // return the next day
  35. 	cout << endl;
  36.  
  37. 	cout << myDay.printDay() << endl;
  38.  
  39. 	return 0;
  40. } // end of main
  41.  
  42. void dayType::setDay(char day)
  43. {
  44. 	if (day = "m" || "M")
  45. 	{
  46. 		(dayofweek [0] == "MONDAY");
  47. 	    current = 1;
  48. 		userEntry = day;
  49. 	}
  50.  
  51. 	if (day = "t" || "T")
  52. 	{
  53. 		(dayofweek [1] == "TUESDAY");
  54. 	    current = 2;
  55. 		userEntry = day;
  56. 	}
  57.  
  58. 	if (day = "w" || "W")
  59. 	{
  60. 		(dayofweek [2] == "WEDNESDAY");
  61. 	    current = 3;
  62. 		userEntry = day;
  63. 	}
  64.  
  65. 	if (day = "r" || "R")
  66. 	{
  67. 		(dayofweek [3] == "THURSDAY");
  68. 	    current = 4;
  69. 		userEntry = day;
  70. 	}
  71.  
  72. 	if (day = "f" || "F")
  73. 	{
  74. 		(dayofweek [4] == "FRIDAY");
  75. 	    current = 5;
  76. 		userEntry = day;
  77. 	}
  78.  
  79. 	if (day = "s" || "S")
  80. 	{
  81. 		(dayofweek [5] == "SATURDAY");
  82. 	    current = 6;
  83. 		userEntry = day;
  84. 	}
  85.  
  86. 	if (day = "u" || "U")
  87. 	{
  88. 		(dayofweek [6] == "SUNDAY");
  89. 	    current = 7;
  90. 		userEntry = day;
  91. 	}
  92. }
  93.  
  94. void dayType::nextDay()
  95. {
  96. 	{
  97. 	current++;
  98. 	if (current = 7)
  99. 	current = 0;
  100. 	}
  101.  
  102. 	{
  103. 	current++;
  104. 	if (current = 6)
  105. 	current = 7;
  106. 	}
  107.  
  108. 	{
  109. 	current++;
  110. 	if (current = 5)
  111. 	current = 6;
  112. 	}
  113.  
  114. 	{
  115. 	current++;
  116. 	if (current = 4)
  117. 	current = 5;
  118. 	}
  119.  
  120. 	{
  121. 	current++;
  122. 	if (current = 3)
  123. 	current = 4;
  124. 	}
  125.  
  126. 	{
  127. 	current++;
  128. 	if (current = 2)
  129. 	current = 3;
  130. 	}
  131.  
  132. 	{
  133. 	current++;
  134. 	if (current = 1)
  135. 	current = 2;
  136. 	}
  137. }
  138.  
  139. void dayType::printDay() const
  140. {
  141. 	cout << "The day is: " << dayofweek << endl;
  142. 	printDay();
  143. }
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Re: Help with Classes !!! (Homework)

 
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  #2
Jul 23rd, 2005
Couple of problems:

if (day = "m" || "M")

must be

if ( day == 'm' || day == 'M' )
because day is a single character. (Even if it were a string you couldn't do a comparison like that, you'd need to use strcmp)

You must specify day once for each comparison. Plus, you want to do double = if you are checking for equality. A single = sets a variable...
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Re: Help with Classes !!! (Homework)

 
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  #3
Jul 23rd, 2005
The setday and nextday functions may be candidates for a switch. Which would be good because you can have it do something then in the default case if the user inputs something besides a char that corresponds to a day of the week.
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Re: Help with Classes !!! (Homework)

 
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  #4
Jul 23rd, 2005
OK. Thanks for the explanation. I fixed.
Do you see anything else wrong ?
What am I missing ?
Coulf you please give me a hint ?
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Re: Help with Classes !!! (Homework)

 
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  #5
Jul 23rd, 2005
A switch inside a function on a class ? Is that OK ?
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Re: Help with Classes !!! (Homework)

 
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  #6
Jul 24th, 2005 
int main();
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Re: Help with Classes !!! (Homework)

 
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  #7
Jul 24th, 2005
How do I get rid of this error:

Deleting intermediate files and output files for project 'Program9 - Win32 Debug'.
--------------------Configuration: Program9 - Win32 Debug--------------------
Compiling...
Program9.cpp
c:\documents and settings\faculdade\ism3232\assig9\program9\program9.cpp(45) : error C2447: missing function header (old-style formal list?)
Error executing cl.exe.

Program9.exe - 1 error(s), 0 warning(s)
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Re: Help with Classes !!! (Homework)

 
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  #8
Jul 24th, 2005
Post the offending line or full code..
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Re: Help with Classes !!! (Homework)

 
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  #9
Jul 24th, 2005
ahahahahahah

C++ Syntax (Toggle Plain Text) 
  1. #include <iostream> // library to use cin and cout
  2. #include <string> // library to strings
  3.  
  4. using namespace std;
  5.  
  6. class dayType
  7. {
  8. public:
  9.     void setDay(char day);
  10.     void nextDay();
  11. 	void printDay() const;
  12.  
  13. private:
  14.     string dayofweek[7];
  15. 	int current;
  16. 	char userEntry;
  17. };
  18.  
  19. int main();
  20. {
  21. 	dayType myDay; // class named dayType - object named myDay
  22. 	char day;
  23.  
  24. 	cout << "Please enter M for Monday, T for Tuesday, W for Wednesday" << endl;
  25. 	cout << "R for Thursday, F for Friday, S for Saturday or U for Sunday" << endl;
  26. 	cout << endl;
  27.  
  28. 	cin >> day;  
  29.  
  30. 	myDay.setDay(day); // set the day
  31. 	cout << endl;
  32. 	myDay.printDay() const; // print the day
  33. 	cout << endl;
  34. 	myDay.nextDay(); // return the next day
  35. 	cout << endl;
  36.  
  37. 	cout << myDay.printDay() << endl;
  38.  
  39. 	return 0;
  40. } // end of main
  41.  
  42. void dayType::setDay(char day)
  43. {
  44. 	if ( day == 'm' || day == 'M' )
  45. 	{
  46. 		(dayofweek [0] == "MONDAY");
  47. 	    current = 1;
  48. 		userEntry = day;
  49. 	}
  50.  
  51. 	if ( day == 't' || day == 'T' )
  52. 	{
  53. 		(dayofweek [1] == "TUESDAY");
  54. 	    current = 2;
  55. 		userEntry = day;
  56. 	}
  57.  
  58. 	if ( day == 'w' || day == 'W' )
  59. 	{
  60. 		(dayofweek [2] == "WEDNESDAY");
  61. 	    current = 3;
  62. 		userEntry = day;
  63. 	}
  64.  
  65. 	if ( day == 'r' || day == 'R' )
  66. 	{
  67. 		(dayofweek [3] == "THURSDAY");
  68. 	    current = 4;
  69. 		userEntry = day;
  70. 	}
  71.  
  72. 	if ( day == 'f' || day == 'F' )
  73. 	{
  74. 		(dayofweek [4] == "FRIDAY");
  75. 	    current = 5;
  76. 		userEntry = day;
  77. 	}
  78.  
  79. 	if ( day == 's' || day == 'S' )
  80. 	{
  81. 		(dayofweek [5] == "SATURDAY");
  82. 	    current = 6;
  83. 		userEntry = day;
  84. 	}
  85.  
  86. 	if ( day == 'u' || day == 'U' )
  87. 	{
  88. 		(dayofweek [6] == "SUNDAY");
  89. 	    current = 7;
  90. 		userEntry = day;
  91. 	}
  92. }
  93.  
  94. void dayType::nextDay()
  95. {
  96. 	{
  97. 	current++;
  98. 	if (current = 7)
  99. 	current = 0;
  100. 	}
  101.  
  102. 	{
  103. 	current++;
  104. 	if (current = 6)
  105. 	current = 7;
  106. 	}
  107.  
  108. 	{
  109. 	current++;
  110. 	if (current = 5)
  111. 	current = 6;
  112. 	}
  113.  
  114. 	{
  115. 	current++;
  116. 	if (current = 4)
  117. 	current = 5;
  118. 	}
  119.  
  120. 	{
  121. 	current++;
  122. 	if (current = 3)
  123. 	current = 4;
  124. 	}
  125.  
  126. 	{
  127. 	current++;
  128. 	if (current = 2)
  129. 	current = 3;
  130. 	}
  131.  
  132. 	{
  133. 	current++;
  134. 	if (current = 1)
  135. 	current = 2;
  136. 	}
  137. }
  138.  
  139. void dayType::printDay() const
  140. {
  141. 	cout << "The day is: " << dayofweek << endl;
  142. 	printDay();
  143. }
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Re: Help with Classes !!! (Homework)

 
0
  #10
Jul 24th, 2005
A couple of issues:


int main(); should be int main() (no ;)

myDay.printDay() const; should be myDay.printDay();
You can't do this:
cout << myDay.printDay() << endl;

because printDay() does not return anything (it returns void)

Also,

You'll end up with some kind of endless loop/recursion here as you are calling your self inside:
void dayType::printDay() const
{
cout << "The day is: " << dayofweek << endl;
printDay();
}
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