Convert array to pointers
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Hello All I have This Code [assignment] and I want the user to control over the maximum size of CSet. using integer pointer instead of integer array and by constructor can specifies the desired size.
#include <iostream> #include <conio.h> using namespace std; const int maxCard = 100; class CSet { private: int elems[maxCard]; int card; public: CSet() { card = 0; return; } bool Member (const int); void AddElem (const int); void RmvElem (const int); void Copy (CSet &); bool Equal (CSet &); void intersect (CSet &,CSet &); void Union (CSet &,CSet &); void print (); }; bool CSet::Member(const int elem) { for (register int i = 0;i < card;++i) if (elems[i] == elem) return true; return false; } void CSet::AddElem(const int elem) { if (Member(elem)) return; if (card < maxCard) elems[card++] = elem; else cout <<"Set Overflow"<<endl; } void CSet::RmvElem(const int elem) { for (register int i = 0;i <card;++i) if (elems[i] == elem) { for (;i<card - 1;++i) elems[i] = elems[i + 1]; --card; } } void CSet::Copy(CSet &set) { for (register int i =0;i<card;++i) set.elems[i] = elems[i]; set.card = card; return; } bool CSet::Equal(CSet &set) { if (card != set.card) return false; for (register int i = 0;i < card;++i) if (!set.Member(elems[i])) return false; return true; } void CSet::intersect(CSet & set,CSet &res) { res.card = 0; for (register int i = 0;i <card;++i) if (set.Member(elems[i])) res.elems[res.card++] = elems[i]; return; } void CSet::Union(CSet &set,CSet &res) { set.Copy(res); for (register int i=0;i <card;++i) res.AddElem(elems[i]); return; } void CSet::print() { cout <<"{"; for (int i=0;i<card-1;++i) cout <<elems[i] <<","; if (card > 0) cout <<elems[card - 1]; cout <<"}\n"; return; } int main () { CSet s1,s2,s3; s1.AddElem(10); s1.AddElem(20); s1.AddElem(30); s1.AddElem(40); s2.AddElem(30); s2.AddElem(50); s2.AddElem(10); s2.AddElem(60); cout <<"S1 = "; s1.print(); cout <<"\nS2 = "; s2.print(); cout <<endl; if (s1.Member(20)) cout <<"20 is in s1"<<endl; s1.intersect(s2,s3); cout <<"s1 intersection s2="; s3.print(); s1.Union(s2,s3) -
Hello All I have This Code [assignment] and I want the user to control over the maximum size of CSet. using integer pointer instead of integer array and by constructor can specifies the desired size.
#include <iostream> #include <conio.h> using namespace std; const int maxCard = 100; class CSet { private: int elems[maxCard]; int card; public: CSet() { card = 0; return; } bool Member (const int); void AddElem (const int); void RmvElem (const int); void Copy (CSet &); bool Equal (CSet &); void intersect (CSet &,CSet &); void Union (CSet &,CSet &); void print (); }; bool CSet::Member(const int elem) { for (register int i = 0;i < card;++i) if (elems[i] == elem) return true; return false; } void CSet::AddElem(const int elem) { if (Member(elem)) return; if (card < maxCard) elems[card++] = elem; else cout <<"Set Overflow"<<endl; } void CSet::RmvElem(const int elem) { for (register int i = 0;i <card;++i) if (elems[i] == elem) { for (;i<card - 1;++i) elems[i] = elems[i + 1]; --card; } } void CSet::Copy(CSet &set) { for (register int i =0;i<card;++i) set.elems[i] = elems[i]; set.card = card; return; } bool CSet::Equal(CSet &set) { if (card != set.card) return false; for (register int i = 0;i < card;++i) if (!set.Member(elems[i])) return false; return true; } void CSet::intersect(CSet & set,CSet &res) { res.card = 0; for (register int i = 0;i <card;++i) if (set.Member(elems[i])) res.elems[res.card++] = elems[i]; return; } void CSet::Union(CSet &set,CSet &res) { set.Copy(res); for (register int i=0;i <card;++i) res.AddElem(elems[i]); return; } void CSet::print() { cout <<"{"; for (int i=0;i<card-1;++i) cout <<elems[i] <<","; if (card > 0) cout <<elems[card - 1]; cout <<"}\n"; return; } int main () { CSet s1,s2,s3; s1.AddElem(10); s1.AddElem(20); s1.AddElem(30); s1.AddElem(40); s2.AddElem(30); s2.AddElem(50); s2.AddElem(10); s2.AddElem(60); cout <<"S1 = "; s1.print(); cout <<"\nS2 = "; s2.print(); cout <<endl; if (s1.Member(20)) cout <<"20 is in s1"<<endl; s1.intersect(s2,s3); cout <<"s1 intersection s2="; s3.print(); s1.Union(s2,s3)Making a pointer array is basic stuff. Look into your book where the
newanddeleteoperators are explained. Also check the chapter which explainsconstructors, and the answer to your question should be clear to you. These are the basics for programming C++ so finding the answer on your own is really best for you in this case, just read these 2 chapters. The only hint I'll give you is to use a parameter in the constructor and the elems will be a pointer in stead of an array. Have fun finding the answer, it should be quite easy with the hints I gave you and if you read about the points I mentioned. Regards, Davy