给定值删除二叉树中的节点（C语言）

#include
#include
struct TreeNode{
    int data;
    struct TreeNode *left;
    struct TreeNode *right;
};
struct TreeNode *findMin(struct TreeNode *T){
    if(T==NULL){
        return NULL;
    }
    if(T->left==NULL){
        return T;
    }
    return findMin(T->left);
}
struct TreeNode *deleteNode(struct TreeNode *T,int num){
    if(T==NULL){
        return NULL;
    }
    if(T->data>num){
        T->left=deleteNode(T->left,num);
    }else if(T->dataright=deleteNode(T->right,num);
    }else if(T->left!=NULL&&T->right!=NULL){
        struct TreeNode *min=findMin(T);
        T->data=min->data;
        T->right=deleteNode(T->right,min->data);
    }else{
        struct TreeNode *temp;
        temp=T;
        if(T->left==NULL){
            T=T->right;
        }else if(T->right==NULL){
            T=T->left;
        }
        free(temp);
    }
    return T;
}
struct TreeNode *createNode(int num){
    struct TreeNode *T;
    T=(struct TreeNode *)malloc(sizeof(struct TreeNode));
    T->data=num;
    T->left=NULL;
    T->right=NULL;
    return T;
}
struct TreeNode *add(struct TreeNode *T,int num){
    if(T==NULL){
        return createNode(num);
    }
    if(numdata){
        T->left=add(T->left,num);
    }else if(num>T->data){
        T->right=add(T->right,num);
    }
    
    return T;
}
void PreOrder(struct TreeNode *T){
    if(T!=NULL){
        printf("t%d",T->data);
        PreOrder(T->left);
        PreOrder(T->right);
    }
}
void InOrder(struct TreeNode *T){
    if(T!=NULL){
        InOrder(T->left);
        printf("t%d",T->data);
        InOrder(T->right);
    }
}
void PostOrder(struct TreeNode *T){
    if(T!=NULL){
        PostOrder(T->left);
        PostOrder(T->right);
        printf("t%d",T->data);
    }
}
int main(){
    struct TreeNode *T;
    T=NULL;
    for(int i=0;i<12;i++){
        T=add(T,i);
    }
    printf("前序遍历:n");
    PreOrder(T);
    printf("n中序遍历:n");
    InOrder(T);
    printf("n后序遍历:n");
    PostOrder(T);
    deleteNode(T,3);
    deleteNode(T,5);
    printf("n删除节点值为3，5后的二叉树:");
     printf("n前序遍历:n");
    PreOrder(T);
    printf("n中序遍历:n");
    InOrder(T);
    printf("n后序遍历:n");
    PostOrder(T);
    return 0;
}