PLEASE READ THE COMMENTS AND FILL IN THE FUNCTIONS: #include  #include  // Read before you start: // Do not modify any part of this program that you are given. Doing so may cause you to fail automated test cases. // You are given a partially complete program. Your job is to complete the functions in order for this program to work successfully. // You should complete this homework assignment using Microsoft Visual Studios 2013 (or a later version). // All instructions are given above the required functions, please read them and follow them carefully. // If you modify the function return types or parameters, you will fail the automated test cases. // You can assume that all inputs are valid. Ex: If prompted for a char, the input will be a char. // Global Macro Values #define NUM_STRINGS 5 #define STRING_LENGTH 32 // Forward Declarations void frequency(char[NUM_STRINGS][STRING_LENGTH],char); void remove_Number(char[NUM_STRINGS][STRING_LENGTH]); void swapStrings(char[STRING_LENGTH], char[STRING_LENGTH]); void sortStrings(char[NUM_STRINGS][STRING_LENGTH]); void printStrings(char[NUM_STRINGS][STRING_LENGTH]); int alpha_Counter(char[STRING_LENGTH]); int isAPalindrome(char[STRING_LENGTH]); void addLetter(char[STRING_LENGTH], char, int); // Problem 1: frequency (5 points) // Rewrite this function to perform the same task as in hw03, using only pointer operations. // You must use pointer operations only. If you use array operations, you will recieve no credit for this part. // You may use the code you submitted for hw03 or you may use the solution code for hw03. // Traverse the 2D array of characters variable 'strings' and check the frequency of a particular letter or a search_alphabetin a string. // In order to check the frequency, first you need to read the search_alphabet from the user. // If the string is "hello" and the search_alphabet is l, the code will count the number of 'l's in hello. // The output of the function for the above mentioned case will be 2. //append that frequency value at the end of the string //for hello the new string will be hello2 void frequency(char strings[NUM_STRINGS][STRING_LENGTH],char search_alphabet) { } // Problem 2: remove_vowel (5 points) // Rewrite this function to perform the same task as in hw03, using only pointer operations. // You must use pointer operations only. If you use array operations, you will recieve no credit for this part. // You may use the code you submitted for hw03 or you may use the solution code for hw03. //Traverse the 2D array of characters variable 'strings' and remove all vowels from the string. // In order to remove all vowel characters, you need to check each letter of the string and decide whether its is a vowel. If so then remove it. If not then check the next character. // If the string is "hello", your result will be hll. //print the new string without vowel using problem 6. void remove_vowel(char strings[NUM_STRINGS][STRING_LENGTH]) { } void swapStrings(char string1[STRING_LENGTH], char string2[STRING_LENGTH]) { char temp[STRING_LENGTH]; strcpy(temp, string1); strcpy(string1, string2); strcpy(string2, temp); } // Problem 3: sortStrings (10 points) // Rewrite this function to perform the same task as in hw03, using only pointer operations. // You must use pointer operations only. If you use array operations, you will recieve no credit for this part. // You can use the swapStrings() function if you'd like, but are not required to do so. // You may use the code you submitted for hw03 or you may use the solution code for hw03. // // Sort the 5 strings contained in the 2D character array parameter labeled "strings". // Sort the strings based on their ASCII character value (use strcmp to compare strings). // NOTE: You MUST incorporate your "swapStrings" function to recieve full points for this part. // See the output provided in the word document for example input and output. void sortStrings(char strings[NUM_STRINGS][STRING_LENGTH]) { } void printStrings(char strings[NUM_STRINGS][STRING_LENGTH]) { int i; for (i = 0; i < NUM_STRINGS; i++) { printf("%s ", strings[i]); } } // Problem 4: vowelCounter (10 points) // This function accepts an array of characters and returns the number of alphabets in that string (an integer). // You must use pointer operations only. If you use array operations, you will recieve no credit for this part. // you should not count any number or special character within the string int alpha_Counter(char string[STRING_LENGTH]) { } // Problem 5: isAPalindrome (10 points) // This function accepts an array of characters and returns an integer. // You must use pointer operations only. If you use array operations, you will recieve no credit for this part. // This function should return 1 (true) if the parameter 'string' is a palindrome, or 0 (false) if 'string' is not a palindrome. // A palindrome is a sequence of characters which when reversed, is the same sequence of characters. // For this assignment, you can assume that 'string' will be a single word containing only lowercase letters and no spaces. // Example Palindromes: mom, racecar, stats, rotator, deleveled int isAPalindrome(char string[STRING_LENGTH]) { } // Problem 6: addLetter (10 points) // This function accepts an array of characters as well as a character to be added to the existig string and a position where this new letter is to be added. // You must use pointer operations only. If you use array operations, you will recieve no credit for this part. // All occurances of the 'letterToBeRemoved' should be removed from character array 'string' // Example: If string = "letter", and letterToAdd = 'a'; the pos=2 after this function terminates, string should contain "leatter" void addLetter(char string[STRING_LENGTH], char letterToAdd, int pos) { } // You should study and understand how this main function works. // Do not modify it in any way, there is no implementation needed here. void main() { int selection,i; char input[STRING_LENGTH]; printf("Assignment 4: Pointer Operations "); printf("Choose one of the following: 1. Sorting Strings 2. Alphabet counter 3. Palindrome 4. Letter Addition "); scanf("%d", &selection); // store integer getchar(); // consume newline char if (selection == 1) { char strings[NUM_STRINGS][STRING_LENGTH]; // will store 5 strings each with a max length of 32 char search_alphabet; for (i = 0; i < NUM_STRINGS; i++) { printf(" Enter the next String: "); // prompt for string fgets(input, sizeof(input), stdin); // store input string input[strlen(input) - 1] = '\0'; // convert trailing ' ' char to '\0' (null terminator) strcpy(strings[i], input); // copy input to 2D strings array } printf("Enter a character for checking its frequency: "); // prompt for integer scanf("%c", &search_alphabet); // store integer frequency(strings, search_alphabet); remove_vowel(strings); printf(" The strings after vowel removal: "); printStrings(strings); sortStrings(strings); printf(" Sorted Strings: "); printStrings(strings); } else if (selection == 2) { printf(" Enter a String: "); // prompt for string fgets(input, sizeof(input), stdin); // store input string input[strlen(input) - 1] = '\0'; // convert trailing ' ' char to '\0' (null terminator) int numAlpha = alpha_Counter(input); printf(" There are %d alphabets in \"%s\"", numAlpha, input); } else if (selection == 3) { printf(" Enter a String: "); // prompt for string fgets(input, sizeof(input), stdin); // store input string input[strlen(input) - 1] = '\0'; // convert trailing ' ' char to '\0' (null terminator) int isPalindrome = isAPalindrome(input); if (isPalindrome) printf(" The string \"%s\" is a palindrome", input); else printf(" The string \"%s\" is not a palindrome", input); } else if (selection == 4) { printf(" Enter a String: "); // prompt for string fgets(input, sizeof(input), stdin); // store input string input[strlen(input) - 1] = '\0'; // convert trailing ' ' char to '\0' (null terminator) char letterToAdd; int pos; printf(" Enter a letter to be added: "); // prompt for char scanf(" %c", &letterToAdd); // store input char printf(" Enter the array position for adding the letter:"); scanf("%d",&pos); addLetter(input, letterToAdd, pos); printf(" Result: %s", input); } else { printf("Program terminating..."); } }