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Thứ Sáu, 5 tháng 9, 2014

#include <stdio.h>
#include <conio.h>
#define MaxLength 10
#define NIL -1
typedef int Node;
typedef
char DataType;
typedef struct
Tree{
DataType Data[MaxLength];
Node Parent[MaxLength];
int
MaxNode;
};



void
MakeNullTree(Tree &T){
T.MaxNode=0;
}

int
EmptyTree (Tree T){
return
(T.MaxNode == 0);
}


Node Parent (Node n,Tree T){
if
(EmptyTree(T) || n>T.MaxNode-1)
return
NIL;
else
return
T.Parent[n];
}

DataType LabelNode(Node n, Tree T){
if
(!EmptyTree(T) && n<=T.MaxNode-1)
return
T.Data[n];
}

Node Root(Tree T){
if
(EmptyTree(T))
return
NIL;
else
return
0;
}

Node LeftMostChild (Node n, Tree T){
if
(n<0) return NIL;
for
(Node i=n+1;i<T.MaxNode;i++){
if
(Parent(i,T) ==n)
return
i;
}

return
NIL;
}


Node RightSibling(Node n, Tree T){
if
(n<0) return NIL;
Node parent = Parent(n,T);
for
(Node i=n+1;i<T.MaxNode;i++){
if
(Parent(i,T)==parent)
return
i;
}

return
NIL;
}


void
PreOrder(Node n, Tree T){
if
(!EmptyTree(T)){
printf("%c ",LabelNode(n,T));
Node i = LeftMostChild(n,T);
while
(i!=NIL){
PreOrder(i,T);
i=RightSibling(i,T);
}
}
}


void
InOrder(Node n, Tree T){
Node i = LeftMostChild(n,T);
if
(i!=NIL)
InOrder(i,T);
printf("%c ",LabelNode(n,T));
i=RightSibling(i,T);
while
(i!=NIL){
InOrder(i,T);
i=RightSibling(i,T);
}
}


void
PostOrder(Node n,Tree T){
Node i=LeftMostChild(n,T);
while
(i!=NIL){
PostOrder(i,T);
i=RightSibling(i,T);
}

printf("%c ",LabelNode(n,T));
}


int
Depth(Node n, Tree T){
Node p=Parent(n,T);
if
(p==-1)
return
0;
return
1+Depth(p,T);
}


int
OrderNode(Node n, Tree T){
int
bac=0;
for
(Node i=n+1;i<T.MaxNode;i++)
bac+=(Parent(i,T)==n);
return
bac;
}


int
OrderTree(Tree T){
int
m=0;
for
(Node i=0;i<T.MaxNode;i++){
int
n=OrderNode(i,T);
if
(m<n)
m=n;
}

return
m;
}


int
IsLeaf(Node n, Tree T){
return
(LeftMostChild(n,T)==NIL);
}


int
Height(Tree T){
int
h=0;
for
(Node i = 0; i<T.MaxNode;i++)
if
(IsLeaf(i,T)){
int
d=Depth(i,T);
if
(h<d)
h=d;
}

return
h;
}


int
IsAncestor(Node a, Node d, Tree T){
while
(d!=NIL){
if
(a==d)
return
1;
else

d=Parent(d,T);
}

return
0;
}



Node CommonAncestor(Node n,Node m, Tree T){
int
dn=Depth(n,T) , dm=Depth(m,T);
if
(Parent(n,T)== Parent(m,T)) return Parent(n,T);
if
(Parent(n,T)== m) return m;
if
(Parent(m,T)== n) return n;
if
(dn > dm)
CommonAncestor(Parent(n,T),m,T);
else if
(dn<dm)
CommonAncestor(n,Parent(m,T),T);
else

CommonAncestor(Parent(n,T),Parent(m,T),T);

}


int
main(){
Tree T;
MakeNullTree(T);
char
data[]={'A','B','C','D','E','F','G','H','I','J'};
int
parent[]={-1, 0, 0, 1, 1, 4, 4, 4, 2, 2 };
for
(int i=0;i<10;i++){
T.Data[i]= data[i];
T.Parent[i]=parent[i];
}

T.MaxNode=10;
printf("Duyet tien tu: "); PreOrder(0,T);
printf("\nDuyet trung tu: "); InOrder(0,T);
printf("\nDuyet hau tu: "); PostOrder(0,T);
printf("\nDo sau cua nut D: %d",Depth(3,T));
printf("\nBac cua nut A = %d va nut E = %d",OrderNode(0,T),OrderNode(4,T));
printf("\nBac cua cay T = %d",OrderTree(T));
printf("\nIsLeaf(B) ? %d ", IsLeaf(1,T));
printf("\nIsLeaf(J) ? %d ", IsLeaf(9,T));
printf("\nChieu cao cay T = %d",Height(T));
printf("\nIsAncestor(B,H) ? %d",IsAncestor(1,7,T));
printf("\nIsAncestor(D,H) ? %d",IsAncestor(3,7,T));
printf("\nIsAncestor(D,A) ? %d",IsAncestor(3,0,T));
printf("\nIsAncestor(D,D) ? %d",IsAncestor(3,3,T));
printf("\nCommonAncestor(F,B) ? %c",LabelNode(CommonAncestor(5,1,T),T));
printf("\nCommonAncestor(D,F) ? %c",LabelNode(CommonAncestor(3,5,T),T));
printf("\nCommonAncestor(F,D) ? %c",LabelNode(CommonAncestor(5,3,T),T));
printf("\nCommonAncestor(D,J) ? %c",LabelNode(CommonAncestor(3,8,T),T));
return
0;
}

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