总代码：
1 #include <bits/stdc++.h> 2 using namespace std; 3 4 5 typedef int ElementType; 6 typedef struct TNode *Position; 7 typedef Position BinTree; 8 struct TNode{ 9 ElementType Data; 10 BinTree Left; 11 BinTree Right; 12 }; 13 14 void PreorderTraversal( BinTree BT ); 15 void InorderTraversal( BinTree BT ); 16 void PostorderTraversal( BinTree BT ); 17 18 BinTree Insert( BinTree BST, ElementType X ); 19 BinTree Delete( BinTree BST, ElementType X ); 20 Position Find( BinTree BST, ElementType X ); 21 Position FindMin( BinTree BST ); 22 Position FindMax( BinTree BST ); 23 24 int main() 25 { 26 BinTree BST, MinP, MaxP, Tmp; 27 ElementType X; 28 int N,i; 29 30 BST = NULL; 31 scanf("%d",&N); 32 for(int i=0;i<N;i++){ 33 scanf("%d",&X); 34 BST = Insert(BST,X); 35 } 36 printf("Preorder: "); PreorderTraversal(BST); printf(" "); 37 MinP = FindMin(BST); 38 MaxP = FindMax(BST); 39 scanf("%d",&N); 40 for(int i=0;i<N;i++){ 41 scanf("%d",&X); 42 Tmp = Find(BST,X); 43 if( Tmp==NULL ) printf("%d is not found ",X); 44 else{ 45 printf("%d is found ",Tmp->Data); 46 if( Tmp==MinP ) printf("%d is the smallest key ", Tmp->Data); 47 if( Tmp==MaxP ) printf("%d is the largest key ", Tmp->Data); 48 } 49 } 50 scanf("%d",&N); 51 for(int i=0;i<N;i++){ 52 scanf("%d",&X); 53 BST = Delete(BST,X); 54 } 55 printf("Inorder:"); InorderTraversal(BST); printf(" "); 56 } 57 58 BinTree Insert(BinTree BST, ElementType X){ 59 if( !BST ){ 60 BST = (BinTree)malloc(sizeof(struct TNode)); 61 BST -> Data = X; 62 BST -> Left = BST -> Right = NULL; 63 } 64 else{ 65 if( X<BST->Data ){ 66 BST -> Left = Insert(BST->Left, X); 67 }else if( X>=BST->Data ){ 68 BST -> Right = Insert(BST->Right,X); 69 } 70 } 71 return BST; 72 } 73 74 BinTree Delete(BinTree BST, ElementType X){ 75 Position Temp; 76 if( !BST ) printf("Not Found "); 77 else if( X>BST->Data ) BST->Right = Delete(BST->Right,X); 78 else if( X<BST->Data ) BST->Left = Delete(BST->Left,X); 79 else{ 80 if( BST->Left && BST->Right ){ 81 Temp = FindMax(BST->Left); 82 BST->Data = Temp->Data; 83 BST->Left = Delete(BST->Left,BST->Data); 84 }else{ 85 Temp = BST; 86 if( !BST->Left ) BST = BST->Right; 87 else BST = BST->Left; 88 free(Temp); 89 } 90 } 91 return BST; 92 } 93 94 void PreorderTraversal(BinTree BST){ 95 if( BST ){ 96 printf("%d ",BST->Data); 97 PreorderTraversal(BST->Left); 98 PreorderTraversal(BST->Right); 99 } 100 } 101 102 void InorderTraversal(BinTree BST){ 103 if( BST ){ 104 InorderTraversal(BST->Left); 105 printf("%d ",BST->Data); 106 InorderTraversal(BST->Right); 107 } 108 } 109 110 Position FindMin(BinTree BST){ 111 if( !BST ) return NULL; 112 else if( !BST->Left ) return BST; 113 else return FindMin(BST->Left); 114 } 115 116 Position FindMax(BinTree BST){ 117 if( !BST ) return NULL; 118 else if( !BST->Right ) return BST; 119 else return FindMax(BST->Right); 120 } 121 122 Position Find(BinTree BST, ElementType X){ 123 if( !BST ) return NULL; 124 else if( BST->Data==X ) return BST; 125 else{ 126 if( X>BST->Data ) return Find(BST->Right,X); 127 else if( X<BST->Data ) return Find(BST->Left,X); 128 } 129 }