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#include <stdio.h>
#include <stdbool.h>
#include <ctype.h>
#include <string.h>
#define MAX_LENGTH 50
// function prototypes
/* The function instruct describes the use
and purpose of the program. */
void instruct();
/* the function getWord reads the word
entered */
void getWord(char[]);
/* the function findLetter searches the word
for a letter and returns the number of times
the letter appears in the word */
int findLetter (char letter, int number, char word[]);
/* the function getGuess prompts the user for
the letter and returns the letter */
char getGuess();
/* the function display displays the letters
found in the word */
void display (const bool alphabet[]);
int main()
{
// declare variables
/* a string variable word to read in the word,
a character variable guess to enter the letter,
an integer variable number for the length of the word,
an integer variable occurrence for the number
of times the letter appears in the word,
and a Boolean array alphabet to indicate
if the letter has been found*/
char word[MAX_LENGTH];
char guess;
int number, occurrence;
bool alphabet[26] = {false};
// call the function instruct
instruct();
// call the function getWord to read in the word
getWord(word);
// find the length of the word
number = strlen(word);
// display a message showing the length of the word
printf("The word is %d characters\n", number);
// call the function getGuess to read the letter
guess = getGuess();
// loop until a 0 is entered
while (guess)
{
/* call the function findLetter to find the number
occurrences of the letter in the word */
occurrence = findLetter(guess, number, word);
// display the number of occurrences of the letter
printf("There are %d %c's.",occurrence, guess);
/* set the array element corresponding with the
letter to true */
if (occurrence)
alphabet[guess-97] = true;
// call the function getGuess to read the letter
guess = getGuess();
}
display (alphabet);
return 0;
}
// function prototypes
/* The function instruct describes the use
and purpose of the program. */
void instruct()
{
printf("This program prompts the user for\t"
"a word and then a letter.\t"
"The word is searched to find the letter.\t"
"The user can enter more letters until a\t"
"zero is entered.\nThe program displays the\t"
"number of times a letter is found, and all\t"
"the letters found in the word.\n\n");
}
/* the function display displays the letters
found in the word */
void display (const bool alphabet[])
{
printf("You found these letters\n");
int temp = 0;
/* loop through the array for the
letters found */
for (int count = 0; count < 26; count++)
{
if (alphabet[count])
printf("%c", alphabet[count]),'\t';
}
printf("\n");
}
/* the function getWord reads the word
entered */
void getWord(char word[])
{
printf("Please enter a word:\n");
scanf_s("%c", word, MAX_LENGTH+1);
return;
}
/* the function getGuess prompts the user for
the letter and returns the letter */
char getGuess()
{
char guess = '\0';
while (guess < 97 || guess > 122)
{
printf("\nWhat letter would you like to guess? (Enter zero to quit.");
scanf_s("%c", &guess, MAX_LENGTH+1);
guess = tolower(guess);
if (guess == '0')
return 0;
}
return guess;
}
/* the function findLetter searches the word
for a letter and returns the number of times
the letter appears in the word */
int findLetter (char letter, int number, char word[])
{
// declare variables
/* declare an integer variable foundLetter
initialized to zero to count the number of times
the letter appears in the word, an integer
variable start initialized to 0 to indicate
the starting search location in the word,
an integer variable stop intialized to the
length of the word to indicate the end
location in the word, a string variable newWord
initialized to word to hold the current word
to be searched, a string::size_type variable
position to indicate if a match has been found */
int foundLetter = 0, start= 0, stop = number;
char newWord[MAX_LENGTH + 1];
strcpy_s(newWord, MAX_LENGTH+1, word);
bool position = false;
// loop through for all uppercase and lowercase
for (int i = 0; i < MAX_LENGTH; i++)
newWord[i] = tolower(newWord[i]);
while (newWord[start] != '\0')
{
if (newWord[start] == letter)
{
foundLetter++;
start++;
}
else;
start++;
}
// return the number of occurrences of the letter
return foundLetter;
}
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