You are to implement four functions, see comments about what each function should do. We recommend you implement them in the order given, from the easist countKeys to the hardest addKey.

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Functions to implement

You are to implement four functions, see comments about what each function should do. We recommend you implement them in the order given, from the easist countKeys to the hardest addKey.

// count number of keys in a dict.

int countKeys(const dictNode *dict) { return 0;

}

// given a key, look up its corresponding value in the

// dictionary, returns -1 if the value is not in the dictionary.

// your search for key should end when the key in the next node

// is bigger than the lookup key or you reached the end of the

// list.

int lookupKey(const dictNode *dict, const char *key) { return -1;

}

 

// delete the node in a dict with given key, return the value of

// the deleted node if it was found, return -1 if it wasn't found.

int deleteKey(dictNode **dictPtr, const char *key) { return -1;

}

 

// given a key/value pair, first lookup the key in the dictionary,

// if it is already there, update the dictionary with the new

// value; if it is not in the dictionary, insert a new node into

// the dictionary, still make sure that the key is in alphabetical

// order.

// IMPORTANT: When creating a new node, make sure you dynamically

 

// allocate memory to store a copy of the key in the memory. You

// may use strdup function. DO NOT STORE the input key from the

// argument directly into the node. There is no guarantee that key

// pointer's value will stay the same.

// YOU MUST KEEP THE ALPHABETICAL ORDER OF THE KEY in the dictionary.

void addKey(dictNode **dictPtr, const char *key, int value) { return;

}

Useful library functions

The following library functions would be helpful during your implementation. use the command

 

%man functionName

 to learn more about how to use these library functions.

 

int strcmp(const char *s1, const char *s2); char *strdup(const char *s);

void *malloc(size_t size); void free(void *ptr);

 

Edit/Compile/Test your C code

Compile your code

Assuming you successfully copied and unpacked hw3handout.tar file in ~/311 folder on your W204 account, the following command will help you compile the given C program. The original tar file contains a complete C program that compiles and works.

cse-p204inst11.cse.psu.edu 160% cd ~/311/hw7handout

You use make command in the hw7handout folder to compile all the .c files to create an executable called dict.

Attachments:

Related Questions

. Introgramming & Unix Fall 2018, CRN 44882, Oakland University Homework Assignment 6 - Using Arrays and Functions in C

DescriptionIn this final assignment, the students will demonstrate their ability to apply two ma

. The standard path finding involves finding the (shortest) path from an origin to a destination, typically on a map. This is an

Path finding involves finding a path from A to B. Typically we want the path to have certain properties,such as being the shortest or to avoid going t

. Develop a program to emulate a purchase transaction at a retail store. This program will have two classes, a LineItem class and a Transaction class. The LineItem class will represent an individual

Develop a program to emulate a purchase transaction at a retail store. Thisprogram will have two classes, a LineItem class and a Transaction class. Th

. SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of Sea Ports. Here are the classes and their instance variables we wish to define:

1 Project 1 Introduction - the SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of

. Project 2 Introduction - the SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of Sea Ports. Here are the classes and their instance variables we wish to define:

1 Project 2 Introduction - the SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of