c作业辅导

b+ tree implementation

Posted on by cs daixie

Introduction

In this project, you will implement a B+-tree in which each node contain entries of the form [key, ptr] and some required header information. In the leaf node, ptr is the pointer pointing to the record id of a data record with search key value, and in the non-leaf node(index node), ptr is the pointer pointing to the child node which may be index or leaf node. Since we are not implementing data file layer in this project, we will keep all leaf node pointers NULL. You must implement the full search and insert algorithms as discussed in class. In particular, your insert routine must be capable of dealing with overflows (at any level of the tree) by splitting pages. Keys should be stored in sorted order. Deletes will be handled by simply deleting the key and pushing the remaining keys in the node. You do not need to implement merging of nodes on deletes. But, you do need to keep all nodes updated without any holes when records are deleted(i.e, when you delete a key

CS100: Matrices solution

Posted on by cs daixie

CS100: Matrices

Revision Date: April 16, 2015

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Preamble

The purpose of this assignment is to give you some practice in creating and using matrices. We want to make sure students are comfortable with iteration and recursion involving matrices. In addition to the above we want to make it so students are familiar with reading in matrices from a file as well.

Task 0: Create your directories (10 points)

Create your directories with the commands

    cd
    cd cs100/labs
    mkdir lab7
    cd lab7
    mkdir month ascii maze

You should be able to just copy and paste these commands into your console. When finished you should have three directories under your lab7 directory called ascii, maze, and month.

Task 1: Generate a month for a calendar (30 points)

Move into dir