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struct array and enum problems

 
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  #1
Apr 20th, 2005
Our program got cut down from a .h and 2 .cpps to just one .h and one .cpp.... so trying to convert fucntions back to my .h I received tons of errors. Hopefully someone can help me get rid of most of these? please? I need to turn in the final program in like 23 hours. Thanks if you can help or if you will. I am not asking anyone to do it... just steer me in the right direction if you see where i am going wrong.... My program is nasty. :cry:

Here is the main thing on my lab that I am working on with it too.... for where the structs and arrays come in:
An array of 10 structures of type aClass will make up the storage mechanism; i.e., you will process 10 students.

Heres my .h:

C++ Syntax (Toggle Plain Text) 
  1. #include<iostream> // all the classes I could ever need for this program
  2. #include<iomanip> // and a few extra just incase.
  3. #include<cmath>
  4. #include<cstdlib>
  5. #include<string>
  6. using namespace std;
  7.  
  8. enum aGrade {a, b, c, d, f, w, i};
  9.  
  10. struct aClass
  11. {
  12. string courses;
  13. aGrade grades;
  14. int hours;
  15. float GP;
  16. };
  17.  
  18. aClass mycourses;
  19.  
  20. void printHead () // this section will display the heading for the output table
  21. {
  22. cout<<"\n\nList of the Courses"<<endl<<"\n Class Hours Grade \n";
  23. cout<<"-----------------------------------"<<endl;
  24. }
  25.  
  26. aGrade convert(enum aGrade in, //OUT: in
  27. aClass mycourses) //IN: grades
  28.  
  29. { 
  30. switch (mycourses.grades) //switch stmt to get all the letters into the enum catagories 
  31. {
  32. case 'a':case 'A':
  33. in = a;
  34. break;
  35. case 'b':case 'B':
  36. in = b;
  37. break;
  38. case 'c':case 'C':
  39. in = c;
  40. break;
  41. case 'd':case 'D':
  42. in = d;
  43. break;
  44. case 'f':case 'F':
  45. in = f;
  46. break;
  47. case 'w':case 'W':
  48. in = w;
  49. break;
  50. case 'i':case 'I':
  51. in = i;
  52. break;
  53.  
  54. }
  55.  
  56. return in;
  57. }
  58.  
  59. int calcGradePoint(enum aGrade in,
  60. aClass mycourses) //This function is used to calculate the totalgpa for one class 
  61.  
  62. { 
  63. if(in == a) 
  64. return 4 * mycourses.hours;
  65. if(in == b)
  66. return 3 * mycourses.hours;
  67. if(in == c)
  68. return 2 * mycourses.hours;
  69. if(in == d)
  70. return 1 * mycourses.hours;
  71. if(in == f)
  72. return 0 * mycourses.hours;
  73. if(in == w)
  74. return 0 * mycourses.hours;
  75. if(in == i)
  76. return 0 * mycourses.hours;
  77.  
  78. }
  79.  
  80.  
  81. void sortClass (aClass mycourses) //IN: cnt
  82. //This bubblesort is used to put the courses into alphabetical order
  83.  
  84. { 
  85. int i = cnt, j = 0, k = 1, temper;
  86. string temp;
  87. char tmp;
  88.  
  89. while (i >= 0 && k)
  90. {
  91.  
  92. k = 0;
  93. for (j = 0; j <= i; j++)
  94. if (mycourses.courses[j] > mycourses.courses[j+1])
  95. {
  96. temp = mycourses.courses[j];
  97. mycourses.courses[j] = mycourses.courses[j+1];
  98. mycourses.courses[j+1] = temp;
  99.  
  100. temper = mycourses.hours[j];
  101. mycourses.hours[j] = mycourses.hours[j+1];
  102. mycourses.hours[j+1] = temper;
  103.  
  104. tmp = mycourses.grades[j];
  105. mycourses.grades[j] = mycourses.grades[j+1];
  106. mycourses.grades[j+1] = tmp;
  107.  
  108. k = 1;
  109. }
  110. i--;
  111. }
  112. }
  113.  
  114.  
  115.  
  116. float calcGPA(const float gpaSum, //IN: gpaSum
  117. const float totalHours ) //IN: totalHours
  118. //This function is used to calculate overall gpa = totalofgpa / totalhours
  119.  
  120. { 
  121. float gpa;
  122. gpa = float (gpaSum / totalHours);
  123. return gpa;
  124. }
  125.  
  126.  
  127. void printLine (cnt, b, aClass mycourses, gpa, totalHour)
  128. {
  129. for (int b = 1; b <= cnt; b++) //puts the information into the table
  130. {
  131. cout<<setw(12)<<mycourses.courses<<setw(9)<<mycourses.hours<<setw(10)<<mycourses.grades<<endl;
  132. }
  133.  
  134. cout<<"\nThe total GPA is "<<gpa<<" and you attempted "<<totalHours<<" hours."<<endl;
  135. }

and here is my .cpp


C++ Syntax (Toggle Plain Text) 
  1. #include "schedule.h"
  2.  
  3.  
  4. int main(){ //Calls main function
  5.  
  6. int cnt = 0; //Variables used
  7. char gpaForOneClass;
  8. float gpa = 0.0, totalHours = 0.0, gpaSum = 0.0;
  9. aGrade in;
  10.  
  11.  
  12. while (cnt < 10)
  13. {
  14. while (1)
  15. {
  16. cout<<"\nEnter a course, the letter grade received, and the credit hours. "<<endl;
  17. cin >> mycourses.courses;
  18.  
  19. if (mycourses.courses == "quit" || mycourses.courses == "QUIT" || mycourses.courses == "Quit") break; //ends input when quit or QUIT is typed
  20.  
  21. cin >> mycourses.grades; 
  22. cin >> mycourses.hours;
  23.  
  24. in = convert(in, aClass mycourses); //converts letter input into right value
  25. gpaForOneClass = calcGradePoint(in, aClass mycourses, cnt); //gets gpa total for one class
  26. gpaSum += gpaForOneClass; //totals up gpa
  27. totalHours = totalHours + mycourses.hours; //totals up hours
  28. cnt = cnt + 1;
  29.  
  30. }
  31.  
  32. }
  33.  
  34. gpa = calcGPA(gpaSum, totalHours); //calls gpa function
  35. printHead(); //calls header function to display table
  36. sortClass(aClass mycourses, cnt); // calls bsort function
  37. printLine(cnt, b, aClass mycourses, gpa, totalHours);
  38.  
  39.  
  40.  
  41. cin>>cnt;
  42.  
  43. return 0;
  44. }

and here are the ridiculous amount errors i get:

C++ Syntax (Toggle Plain Text) 
  1. 15 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp In file included from C:/Documents and Settings/Josh/Desktop/Lab5/cs110lab5.cpp 
  2. C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h In function `void sortClass(aClass)': 
  3. 87 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h `cnt' undeclared (first use this function) 
  4. 87 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h (Each undeclared identifier is reported only once for each function it appears 
  5. 100 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h cannot convert `std::string' to `char' in assignment 
  6.  
  7. 102 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h invalid types `int[int]' for array subscript 
  8. 103 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h invalid types `int[int]' for array subscript 
  9. 103 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h invalid types `int[int]' for array subscript 
  10. 104 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h invalid types `int[int]' for array subscript 
  11. 106 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h invalid types `aGrade[int]' for array subscript 
  12. 107 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h invalid types `aGrade[int]' for array subscript 
  13. 107 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h invalid types `aGrade[int]' for array subscript 
  14. 108 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h invalid types `aGrade[int]' for array subscript 
  15.  
  16. /Documents and Settings/Josh/Desktop/Lab5/schedule.h C:\Documents and Settings\Josh\Desktop\Lab5\C At global scope: 
  17. 129 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h syntax error before `,' token 
  18. C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h In function `void printLine(...)': 
  19. 136 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h `gpa' undeclared (first use this function) 
  20. 136 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h `totalHours' undeclared (first use this function) 
  21. C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp In function `int main()': 
  22.  
  23. 35 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp no match 
  24. for 'operator>>' in 'std::cin >> mycourses.aClass::grades' 
  25. error C:\Dev-Cpp\include\c++\3.3.1\bits\istream.tcc:83 candidates are: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, 
  26. 92 C:\Dev-Cpp\include\c++\3.3.1\bits\istream.tcc std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, 
  27. 101 C:\Dev-Cpp\include\c++\3.3.1\bits\istream.tcc std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, 
  28. That same error.... 19 more times then..
  29.  
  30. 74 C:\Dev-Cpp\include\c++\3.3.1\iomanip std::basic_istream<_CharT, _Traits>& 
  31. that same error....4 more times
  32.  
  33. 38 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp syntax error before `)' token 
  34. 39 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp syntax error before `,' token 
  35. 50 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp syntax error before `,' token 
  36. 51 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp syntax error before `,' token
  37.  
Last edited by BountyX; Apr 20th, 2005 at 7:46 pm. Reason: Code Tags
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Re: struct array and enum problems

 
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  #2
Apr 20th, 2005
Some of the variables being used in the .h file are declared in the .cpp file, which is after you include the info from the .h file.

I reccomend making a schedule class. The code, as it is now, seems unorganzied and making a class would tidy things up a bit. It would also fix most of your problems since they are related to using undeclared variables from the .h file.

Schedule.h can be a class declaration while Schedule.cpp can be the implementation. Have a seperate file (main.cpp?) that contains the main function and implements the class.
A Hacker's Mind:
"I thought what I'd do was, I'd pretend I was one of those deaf-mutes..." - J.D.Salinger
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Re: struct array and enum problems

 
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  #3
Apr 20th, 2005
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Originally Posted by BountyX
I reccomend making a schedule class. The code, as it is now, seems unorganzied and making a class would tidy things up a bit. It would also fix most of your problems since they are related to using undeclared variables from the .h file.
Well, originally I had a schedule class. I thought that was how it was supposed to be turned in (a schedule class, a schedule.cpp, and the main program .cpp) I went to lab today and was informed that "thats harder to do it that way and we are saving classes for lab 6". I had spent about 8 hours working on the program prior to this with defining the class, getting all the function variables lined up, etc. I was told if I did that, points would be taken away because they didnt want to look thru extra code if they didnt have to... Therefore I was trying to edit my program back to just the header file and the main.cpp file.... I agree its unorganized and needs major cleanup work. Thanks for your help.
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Re: struct array and enum problems

 
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  #4
Apr 21st, 2005
here's my header file... (we are supposed to include our functions here this file... i know its ugly.. but its at the professors/Teaching Assistants discretion.)


C++ Syntax (Toggle Plain Text) 
  1. #include<iostream>  // all the classes I could ever need for this program
  2. #include<iomanip>   // and a few extra just incase.
  3. #include<cmath>
  4. #include<cstdlib>
  5. #include<string>
  6. using namespace std;
  7.  
  8. enum aGrade {a, b, c, d, f, w, i};
  9.  
  10. struct aClass
  11. {
  12.        string courses;
  13.        aGrade grades;
  14.        int hours;
  15.        float GP;
  16. };
  17.  
  18. int  cnt = 0;                //Variables used
  19. char gpaForOneClass;
  20. float gpa = 0.0, totalHours = 0.0, gpaSum = 0.0;
  21. aGrade in;
  22.  
  23. aClass mycourses[10];
  24.  
  25. void printHead ()  // this section will display the heading for the output table
  26. {
  27.      cout<<"\n\nList of the Courses"<<endl<<"\n       Class      Hours     Grade       \n";
  28.      cout<<"-----------------------------------"<<endl;
  29. }
  30.  
  31. aGrade convert(enum aGrade in, int cnt,     //OUT: in
  32.                   aClass mycourses[])       //IN: grades
  33.  
  34. {                                                
  35.   switch (mycourses[cnt].grades)      //switch stmt to get all the letters into the enum catagories                       
  36.     {
  37.       case 'a':case 'A':
  38.         in = a;
  39.         break;
  40.       case 'b':case 'B':
  41.         in = b;
  42.         break;
  43.       case 'c':case 'C':
  44.         in = c;
  45.         break;
  46.       case 'd':case 'D':
  47.         in = d;
  48.         break;
  49.       case 'f':case 'F':
  50.         in = f;
  51.         break;
  52.       case 'w':case 'W':
  53.         in = w;
  54.         break;
  55.       case 'i':case 'I':
  56.         in = i;
  57.         break;
  58.  
  59.     }
  60.  
  61.   return in;
  62. }
  63.  
  64. int calcGradePoint(enum aGrade in,
  65.                aClass mycourses[])        //This function is used to calculate the totalgpa for one class                                      
  66.  
  67. {                                     
  68.  if(in == a)      
  69.    return 4 * mycourses[cnt].hours;
  70.  if(in == b)
  71.    return 3 * mycourses[cnt].hours;
  72.  if(in == c)
  73.    return 2 * mycourses[cnt].hours;
  74.  if(in == d)
  75.    return 1 * mycourses[cnt].hours;
  76.  if(in == f)
  77.     return 0 * mycourses[cnt].hours;
  78.  if(in == w)
  79.     return 0 * mycourses[cnt].hours;
  80.  if(in == i)
  81.     return 0 * mycourses[cnt].hours;
  82.  
  83. }
  84.  
  85.  
  86. void sortClass (aClass mycourses[], int cnt)    //IN: cnt
  87.             //This bubblesort is used to put the courses into alphabetical order
  88.  
  89. {                                 
  90.       int i = cnt, j = 0, k = 1, temper;
  91.       string temp;
  92.       char tmp;
  93.  
  94.       while (i >= 0 && k)
  95.       {
  96.  
  97.             k = 0;
  98.             for (j = 0; j <= i; j++)
  99.                  if (mycourses[j].courses > mycourses[j+1].courses)
  100.                  {
  101.                        temp = mycourses[j].courses;
  102.                        mycourses[j].courses = mycourses[j+1].courses;
  103.                        mycourses[j+1].courses = temp;
  104.  
  105.                        temper = mycourses[j].hours;
  106.                        mycourses[j].hours = mycourses[j+1].hours;
  107.                        mycourses[j+1].hours = temper;
  108.  
  109.                        tmp = mycourses[j].grades;
  110.                        mycourses[j].grades = mycourses[j+1].grades;
  111.                        mycourses[j+1].grades = tmp;
  112.  
  113.                        k = 1;
  114.                   }
  115.             i--;
  116.             }
  117. }
  118.  
  119.  
  120.  
  121. float calcGPA(const float gpaSum,    //IN: gpaSum
  122.              const float  totalHours )  //IN:  totalHours
  123.                 //This function is used to calculate overall gpa = totalofgpa / totalhours
  124.  
  125. {                                         
  126.       float gpa;
  127.       gpa = float (gpaSum / totalHours);
  128.       return gpa;
  129. }
  130.  
  131.  
  132. void printLine (cnt, b, aClass mycourses[], gpa, totalHour)
  133. {
  134.       for (int b = 1; b <= cnt; b++)  //puts the information into the table
  135.       {
  136.           cout<<setw(12)<<mycourses[b].courses<<setw(9)<<mycourses[b].hours<<setw(10)<<mycourses[b].grades<<endl;
  137.       }
  138.  
  139.       cout<<"\nThe total GPA is "<<gpa<<" and you attempted "<<totalHours<<" hours."<<endl;
  140. }


and here is my main program... .cpp

C++ Syntax (Toggle Plain Text) 
  1. #include "schedule.h"
  2.  
  3.  
  4. int main(){      //Calls main function
  5.  
  6.  
  7.  
  8.     while (cnt < 10)
  9.     {
  10.           while (1)
  11.               {
  12.                    cout<<"\nEnter a course, the letter grade received, and the credit hours. "<<endl;
  13.                    cin >> mycourses[cnt].courses;
  14.  
  15.                    if (mycourses[cnt].courses == "quit" || mycourses[cnt].courses == "QUIT" || mycourses[cnt].courses == "Quit")  break;  //ends input when quit or QUIT is typed
  16.  
  17.                    cin >> mycourses[cnt].grades;            
  18.                    cin >> mycourses[cnt].hours;
  19.  
  20.                    in = convert(in, cnt, aClass mycourses[]);                    //converts letter input into right value
  21.                    gpaForOneClass = calcGradePoint(in, aClass mycourses[], cnt);  //gets gpa total for one class
  22.                    gpaSum += gpaForOneClass;                //totals up gpa
  23.                    totalHours = totalHours + mycourses[cnt].hours;        //totals up hours
  24.                    cnt = cnt + 1;
  25.  
  26.              }
  27.  
  28.     }
  29.  
  30.     gpa = calcGPA(gpaSum, totalHours);  //calls gpa function
  31.     printHead();                           //calls header function to display table
  32.     sortClass(aClass mycourses[], cnt);   // calls bsort function
  33.     printLine(cnt, b, aClass mycourses[], gpa, totalHours);
  34.  
  35.  
  36.  
  37.     cin>>cnt;
  38.  
  39.     return 0;
  40. }



and here are the errors i am receiving in full...

C++ Syntax (Toggle Plain Text) 
  1. 15 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp In file included from C:/Documents and Settings/Josh/Desktop/Lab5/cs110lab5.cpp 
  2.  C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h In function `void  sortClass(aClass*, int)': 
  3. 113 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h cannot  convert `char' to `aGrade' in assignment 
  4. /Documents and Settings/Josh/Desktop/Lab5/schedule.h C:\Documents and Settings\Josh\Desktop\Lab5\C At global scope: 
  5. 134 C:\Documents and Settings\Josh\Desktop\Lab5\schedule.h syntax error  before `[' token 
  6.  C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp In function `int  main()': 
  7.  
  8. 31 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp no match  for 'operator>>' in 'std::cin >> mycourses[cnt].aClass::grades' 
  9.  error C:\Dev-Cpp\include\c++\3.3.1\bits\istream.tcc:83 candidates are:  std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,  
  10. 92 C:\Dev-Cpp\include\c++\3.3.1\bits\istream.tcc                  std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,  
  11. 16 more of these errors.
  12.  
  13. 644 C:\Dev-Cpp\include\c++\3.3.1\istream                  std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char,  
  14. 3 more of these errors.
  15.  
  16. 74 C:\Dev-Cpp\include\c++\3.3.1\iomanip                  std::basic_istream<_CharT, _Traits>&  
  17. 4 more of these errors.
  18.  
  19. 34 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp syntax  error before `[' token 
  20. 35 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp syntax  error before `[' token 
  21. 46 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp syntax  error before `[' token 
  22. 47 C:\Documents and Settings\Josh\Desktop\Lab5\cs110lab5.cpp syntax  error before `[' token
  23.  

There is a problem with the enum file aGrade im sure but I'm not exactly sure how to fix it...

And i dont know how to fix the" syntax error before `[' token " errors.
Any advice? Thanks.
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Re: struct array and enum problems

 
0
  #5
Apr 21st, 2005
Sorry, I've just taken a cursory look.
•
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•
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Originally Posted by jhdobbins
There is a problem with the enum file aGrade im sure but I'm not exactly sure how to fix it...
Should tmp be an aGrade, should mycourses[j+1].grades be a char, or do you need to convert from a char to an aGrade?

•
•
•
•
Originally Posted by jhdobbins
And i dont know how to fix the" syntax error before `[' token " errors.
Provide type information for all parameters in the function definition. 
void printLine (/*???*/cnt, /*???*/b, aClass mycourses[], /*???*/gpa, /*???*/totalHour)

•
•
•
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Originally Posted by jhdobbins
(we are supposed to include our functions here this file... i know its ugly.. but its at the professors/Teaching Assistants discretion.)
My condolences. I wonder what other bad programming practices you will be taught.
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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