Visual C++ .NET/Collections/set

Adding element to a set

<source lang="csharp">

1. include "stdafx.h"
2. include <cliext/set>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public:

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) {

   set<MyClass^> pets; 
   MyClass^ King = gcnew MyClass("K");
   pets.insert(pets.end(), gcnew MyClass("A"));
   pets.insert(King); 
   pets.insert(gcnew MyClass("B"));
   return (0);

}

 </source>

Display set with for loop using reverse_iterator

<source lang="csharp">

1. include "stdafx.h"
2. include <cliext/set>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public:

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) {

   set<MyClass^> pets; 
   MyClass^ King = gcnew MyClass("K");
   pets.insert(pets.end(), gcnew MyClass("A"));
   pets.insert(King); 
   pets.insert(gcnew MyClass("B"));
   set<MyClass^>::pair_iter_bool success;
   success = pets.insert(gcnew MyClass("N"));
   Console::WriteLine("First Time {0} is added {1}", success.first->Name, 
       success.second ? "successfully" : "unsuccessfully");
   success = pets.insert(gcnew MyClass("N"));
   Console::WriteLine("Second Time {0} is added {1}", success.first->Name,
       success.second ? "successfully" : "unsuccessfully");
   set<MyClass^>::reverse_iterator pet_ri;
   for(pet_ri = pets.rbegin(); pet_ri != pets.rend(); pet_ri++)
       System::Console::Write("{0} ", pet_ri->Name); 
       
   return (0);

}

 </source>

Find element in a set

<source lang="csharp">

1. include "stdafx.h"
2. include <cliext/set>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public:

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) {

   set<MyClass^> pets; 
   MyClass^ King = gcnew MyClass("K");
   pets.insert(pets.end(), gcnew MyClass("A"));
   pets.insert(King); 
   pets.insert(gcnew MyClass("B"));
   
   Console::WriteLine("\n\nFound = {0}", pets.find(King)->Name);
   return (0);

}

 </source>

find function returns set<MyClass^>::iterator

<source lang="csharp">

1. include "stdafx.h"
2. include <cliext/set>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public:

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) {

   set<MyClass^> pets; 
   MyClass^ King = gcnew MyClass("K");
   pets.insert(pets.end(), gcnew MyClass("A"));
   pets.insert(King); 
   pets.insert(gcnew MyClass("B"));
   
   set<MyClass^>::iterator Lady = pets.find(gcnew MyClass("L"));
   Console::WriteLine(Lady == pets.end());
   return (0);

}

 </source>

Insert and erase element from a set

<source lang="csharp">

1. include "stdafx.h"
2. include <cliext/set>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public:

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) {

   set<MyClass^> pets; 
   MyClass^ King = gcnew MyClass("K");
   pets.insert(pets.end(), gcnew MyClass("A"));
   pets.insert(King); 
   pets.insert(gcnew MyClass("B"));
   
   set<MyClass^> copy;
   set<MyClass^>::iterator pets_e = pets.end();
   copy.insert(pets.begin(), --pets_e);
   set<MyClass^>::iterator pets_cb = copy.begin();
   copy.erase(++pets_cb);
   copy.erase(gcnew MyClass("Lady"));
   for each (MyClass^ pet in copy) 
       System::Console::Write("{0} ", pet->Name); 
   return (0);

}

 </source>

Inserting duplicate elements to set

<source lang="csharp">

1. include "stdafx.h"
2. include <cliext/set>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public:

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) {

   set<MyClass^> pets; 
   MyClass^ King = gcnew MyClass("K");
   pets.insert(pets.end(), gcnew MyClass("A"));
   pets.insert(King); 
   pets.insert(gcnew MyClass("B"));
   set<MyClass^>::pair_iter_bool success;
   success = pets.insert(gcnew MyClass("N"));
   Console::WriteLine("First Time {0} is added {1}", success.first->Name, 
       success.second ? "successfully" : "unsuccessfully");
   success = pets.insert(gcnew MyClass("N"));
   Console::WriteLine("Second Time {0} is added {1}", success.first->Name,
       success.second ? "successfully" : "unsuccessfully");
   set<MyClass^>::reverse_iterator pet_ri;
   for(pet_ri = pets.rbegin(); pet_ri != pets.rend(); pet_ri++)
       System::Console::Write("{0} ", pet_ri->Name); 
       
   return (0);

}

 </source>