Hello! I require assistance with a rather complex C program. I have provided the details below:

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Read in the dictionary words from a file. The name of the dictionary file must be $$dictionary$.$txt$.$Make the following assumptions about the dictionary file:

a$.$Each line contains the words that begin with particular letter.

b$.$The words in each line are separated by tab $(\backslash$t$).$

c$.$Each word consists only of lowercase letters in the range a$-$z$.$

d$.$The maximum length of a single line is $99$characters$.$

e$.$The maximum number of words is $1000.$

Contents of dictionary.txt:

ape apple

ball bill bull

foot

parrot peeble

season

zebras zoo

If file unable to open, print: $$Failed to open dictionary file $$dictionary$.$txt$$followed by newline.$/$

Write a C program that prompts the user to select from $4$options:

$1.$Print the dictionary.

$2.$Search a word in the dictionary.

$3.$Group of letters.

$4.$Quit$.$

Make a Selection: $\_$

If the user selects $"1.$Print the dictionary":

The program should print in the screen the dictionary words from the dictionary file. After printing the dictionary file contents, it will go back to the main menu only when the user presses any key from the keyboard.

If the user selects $"2.$Search a word in the dictionary":

The program should ask the user which word he$/$she wants to search for, read the words of the dictionary one by one, and compare each word from the dictionary with the word the user provided. Then it will print to the screen if the word is in the dicitonary or not. After printing the result from the search, it will go back to the main menu only when the user presses any key from the keyboard. The user can enter the new word to search for in uppercase or lowercase, the search must be case insensitive $($ex: suppose the word zebras exists in the dictionary, if the user types ZEBRAS, the word does exist in the dictionary because it is the same as zebras$).$

If the user selects $"3.$Group of letters":

The program should prompt the user for a string that contains a series of letters. The program will read in the letters and print out which dictionary words can be made from the provided letters.

In very general terms, determining if a given word can be made from the given group of letters will require counting how many distinct kinds of letters there are in the given group of letters and in each word, executing this process word by word.

For example, assume that the word $$bull$$is in the dictionary. The word $$bull$$contains $1$b$$character$,2$l$$characters$,$and $1$u$$character$.$Now say the input letters were $$alblldi$.$In $$alblldi$,$we have enough $$b$$characters for $$bull$,$since $$alblldi$$contains at least $1$b$$character$.$Similarily$,$alblldi$,$has enough $$l$$characters for $$bull$,$since $$alblldi$$contains at least $2$l$$characters$.$However$,$alblldi$$does not have at least $1$u$$character$,$and as such we know that we cannot make $$bull$$using the group of letters $$alblldi$.$

The program will print the words that can be made using the provided letters, and $,$it will go back to the main menu only when the user presses any key from the keyboard.

For instance, the following would be some output from your program $($each example below represents a situation where the user selected the "Group of Letters" option$)$:

$------$first example $----$

enter letters: alblldi

alblldi:

$$ball

$$bill

press any key to go back to the main menu $\_$

$------$second example $----$

$$

enter letters: moo

moo:

press any key to go back to the main menu $\_$

$------$third example $----$

$$

enter letters: bleppa

bleppa:

$$ape

$$apple

press any key to go back to the main menu $\_$

$$

For Option $3,$the program must meet the following requirements for the group of letters option:

a$.$The program prints words in the dictionary that could be made in alphabetic order, as specified in the dictionary.

b$.$The program prints out what letters were typed in$,$followed by a colon $($:$),$followed by a list of the words that could be made $($if any$).$

c$.$Each word that could be made is prefixed by a tab character $(\backslash$t$).$

d$.$If the user types an upper case letter your program must convert it to lower case. $($Case Insensitive$).$

e$.$The group of letters could contain spaces or characters that are not letters of the english alphabet, and the program must remove the spaces or characters that are not letters and create a new string that only contains letters of the english alphabet. $($ex: if the user types "ALB@ LL$!$di$"$you must convert the string to "alblldi"$).$

There are a lot of different ways to perform this sort of counting, but the shortest way will probably involve an array of $26$integers$,$one for each letter of the alphabet. The first index in this array refers to the number of $$a$$characters$,$the second index the number of $$b$$characters$,$and so on$.$

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This is a large request, but I would greatly appreciate any help with this.