class template methods
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I am inheriting from a template class in order to store strings within a list type of structure, CGenericList. I would like to call an instance of this class so that I can use its methods within the implementation of the base class. CSentenceList.h class CSentenceList : CGenericList { public: .... CGenericList Sentences(); //linked list of sentences }; CSentenceList.cpp CSentenceList::CSentenceList(char strFileToRead[MAX_SENTENCE_LENGTH + 1], bool bSorted) : CGenericList () {//initialize} ... void CSentenceList::readFile(char strFileToRead[MAX_FILENAME_LENGTH]) { char strLine[MAX_SENTENCE_LENGTH + 1]; fstream fileToRead(strFileToRead,ios::in); while (!fileToRead.eof() && Size < MAX_LINES) // Read line of text from file and update Sentences.strSentence. { fileToRead.getline(strLine, MAX_SENTENCE_LENGTH); Sentences.Insert(&strLine); // Error 2228: SentenceList.cpp(34): error C2228: left of '.Insert' must have class/struct/union type Size++; } fileToRead.close(); } How can I use methods of Sentences? Is it possible to implement it in another way? Jon
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I am inheriting from a template class in order to store strings within a list type of structure, CGenericList. I would like to call an instance of this class so that I can use its methods within the implementation of the base class. CSentenceList.h class CSentenceList : CGenericList { public: .... CGenericList Sentences(); //linked list of sentences }; CSentenceList.cpp CSentenceList::CSentenceList(char strFileToRead[MAX_SENTENCE_LENGTH + 1], bool bSorted) : CGenericList () {//initialize} ... void CSentenceList::readFile(char strFileToRead[MAX_FILENAME_LENGTH]) { char strLine[MAX_SENTENCE_LENGTH + 1]; fstream fileToRead(strFileToRead,ios::in); while (!fileToRead.eof() && Size < MAX_LINES) // Read line of text from file and update Sentences.strSentence. { fileToRead.getline(strLine, MAX_SENTENCE_LENGTH); Sentences.Insert(&strLine); // Error 2228: SentenceList.cpp(34): error C2228: left of '.Insert' must have class/struct/union type Size++; } fileToRead.close(); } How can I use methods of Sentences? Is it possible to implement it in another way? Jon
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I am inheriting from a template class in order to store strings within a list type of structure, CGenericList. I would like to call an instance of this class so that I can use its methods within the implementation of the base class. CSentenceList.h class CSentenceList : CGenericList { public: .... CGenericList Sentences(); //linked list of sentences }; CSentenceList.cpp CSentenceList::CSentenceList(char strFileToRead[MAX_SENTENCE_LENGTH + 1], bool bSorted) : CGenericList () {//initialize} ... void CSentenceList::readFile(char strFileToRead[MAX_FILENAME_LENGTH]) { char strLine[MAX_SENTENCE_LENGTH + 1]; fstream fileToRead(strFileToRead,ios::in); while (!fileToRead.eof() && Size < MAX_LINES) // Read line of text from file and update Sentences.strSentence. { fileToRead.getline(strLine, MAX_SENTENCE_LENGTH); Sentences.Insert(&strLine); // Error 2228: SentenceList.cpp(34): error C2228: left of '.Insert' must have class/struct/union type Size++; } fileToRead.close(); } How can I use methods of Sentences? Is it possible to implement it in another way? Jon
Just out of curiousity, is there some reason you are not using the
stringandlist(orvector) classes?If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac
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typically derived class is whatever is base class. in this case derived class is defined as a base class and can access base class functions template base { public: b(){} }; template derived : base { public: d{} { base::b() }; Kuphryn
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Just out of curiousity, is there some reason you are not using the
stringandlist(orvector) classes?If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac
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Just out of curiousity, is there some reason you are not using the
stringandlist(orvector) classes?If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac
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This is an academic assignment and the tutor discouraged me from using strings, because I can understand arrays of chars more easily I guess. I don't know what vectors are to be honest.
Jon
jon_80 wrote:
This is an academic assignment and the tutor discouraged me from using strings, because I can understand arrays of chars more easily I guess.
Most likely, he (or she) wanted you to understand what actually goes on under the hood of the
stringclass (and those like it). This isn't a bad thing, but you should remember that once you understand what it does, there is no need to reinvent the wheel, and doing so is actually bad practice. edit: Is this code for an assignment? If so, what are the restrictions on the assignment?jon_80 wrote:
I don't know what vectors are to be honest.
A
vectoris nothing more than an array. Thevectortemplate class wraps an array so that you can dynamically add/remove elements in it without worrying about the details of memory allocation/deallocation for the array yourself. -- modified at 13:41 Thursday 10th August, 2006If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac
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Btw, any idea on how I can resolve it, please? I'm sorry but as you know I'm quite new to c++... no wonder everyone says it's 'techy' tho :) Jon
Without seeing what else you have defined in your CSentenceList class, I can't even tell you if you are using a decent design.
If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac
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Without seeing what else you have defined in your CSentenceList class, I can't even tell you if you are using a decent design.
If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac
CSentenceList.h --------------------------------------------------- class CSentenceList : CGenericList { public: //Methods CSentenceList(char strFileToRead[MAX_SENTENCE_LENGTH], bool bSorted = false); virtual ~CSentenceList(void); void sort(); unsigned int search(const char *strSearch); CGenericList Sentences(); //linked list of sentences //Properties unsigned int Size; private: unsigned int searchInSentence(const char* sentence, const char* strSearch); void CSentenceList::readFile(char strFileToRead[MAX_FILENAME_LENGTH]); }; CSentenceList.cpp (extract) --------------------------- SentenceList::CSentenceList(char strFileToRead[MAX_SENTENCE_LENGTH + 1], bool bSorted) : CGenericList () ... void CSentenceList::readFile(char strFileToRead[MAX_FILENAME_LENGTH]) { char strLine[MAX_SENTENCE_LENGTH + 1]; fstream fileToRead(strFileToRead,ios::in); while (!fileToRead.eof() && Size < MAX_LINES) // Read line of text from file and update Sentences.strSentence. { fileToRead.getline(strLine, MAX_SENTENCE_LENGTH); Sentences.Insert(&strLine); //error C2228: left of '.Insert' must have class/struct/union type Size++; } fileToRead.close(); } Jon