i need algorithm for r tree in c and along with c code with

i need algorithm for r- tree in c++ and along with c++ code with setp by step explanation of code

Solution

#include <iostream>
#include \"RTree.h\"

using namespace std;

typedef int vluType;

struct Rctt
{
Rctt() {}

Rctt(int AMIN, int aMINy, int aMINX, int AMXVY)
{
min[0] = AMIN;
min[1] = aMINy;

max[0] = aMINX;
max[1] = AMXVY;
}

int min[2];
int max[2];
};

struct Rctt rcgcs[] =
{
Rctt(0, 0, 2, 2),
Rctt(5, 5, 7, 7),
Rctt(8, 5, 9, 6),
Rctt(7, 1, 9, 2),
};

int nrects = sizeof(rcgcs) / sizeof(rcgcs[0]);

Rctt search_rect(6, 4, 10, 6); // search will find above rcgcs that this one overlaps

bool mysrchCallbak(vluType id, void* arg)
{
cout << \"Hit data rect \" << id << \"\ \";
return true;
}

int main()
{
typedef RTree<vluType, int, 2, float> MyTree;
MyTree tree;

int i, nhits;
cout << \"nrects = \" << nrects << \"\ \";

for(i=0; i<nrects; i++)
{
tree.Insert(rcgcs[i].min, rcgcs[i].max, i); // Note, all values including zero are fine in this version
}

nhits = tree.Search(search_rect.min, search_rect.max, mysrchCallbak, NULL);

cout << \"Search resulted in \" << nhits << \" hits\ \";

  
int itIndex = 0;
MyTree::Iterator it;
for( tree.GetFirst(it);
!tree.IsNull(it);
tree.GetNext(it) )
{
int value = tree.GetAt(it);

int boundsMin[2] = {0,0};
int boundsMax[2] = {0,0};
it.GetBounds(boundsMin, boundsMax);
cout << \"it[\" << itIndex++ << \"] \" << value << \" = (\" << boundsMin[0] << \",\" << boundsMin[1] << \",\" << boundsMax[0] << \",\" << boundsMax[1] << \")\ \";
}

// Iterator test, alternate syntax
itIndex = 0;
tree.GetFirst(it);
while( !it.IsNull() )
{
int value = *it;
++it;
cout << \"it[\" << itIndex++ << \"] \" << value << \"\ \";
}

return 0;
}