FDS (KR) - Ass 1 (String Operations)

####################################
##  KR LAB 1 - STRING OPERATIONS  ##
####################################

##########################
##  1. CHARACTER COUNT  ##
##########################
def charcount():
    word = input("Enter a word: ")
    count = 0
    for char in word:
        count += 1
    print(count)
# charcount()



###############################
##  2. WORD WITH MAX LENGTH  ##
###############################
def maxLengthWord():
    statement = input("Enter a sentence: ")
    statement = statement.split(" ")
    max = 0
    for i in statement:
        if len(i) >= max:
            max = len(i)
            word = i
    print("The word with max length is: " + word)
    print("and its length is: " + str(max))
# maxLengthWord()



######################################
##  3. FREQUENCY OF A GIVEN LETTER  ##
######################################
def getLetterFrequency():
    word = input("Enter a word: ")
    letter = input("Enter the letter to be checked: ")
    count = 0
    for i in word:
        if i == letter:
            count += 1
    print("Frequency of the letter " + letter + " in the given string is: " + str(count))
# getLetterFrequency()



####################################
##  4. FREQUENCY OF EVERY LETTER  ##
####################################
def getEachLetterFrequency():
    string = input("Enter a string: ")
    dstring = ""
    for i in string:
        if i not in dstring:
            dstring += i
    for letter in dstring:
        count = 0
        for i in string:
            if i == letter:
                count += 1
        print("Frequency of the letter " + letter + " is: ", count)
# getEachLetterFrequency()



##################################################
##  5. FREQUENCY OF A GIVEN WORD IN A SENTENCE  ##
##################################################
def wordFrequency():
    string = input("Enter a string: ")
    string = string.split(" ")
    tocheck = input("Enter the word: ")
    count = 0
    for word in string:
        if word == tocheck:
            count += 1
    print("Frequency of the word " + tocheck + " is " + str(count))
# wordFrequency()



###########################
##  6. PALINDROME CHECK  ##
###########################
def isPalindrome():
    string = input("Enter a word: ")
    i = 0
    j = (len(string) - 1)
    while (i <= (len(string) / 2)):
        if string[i] == string[j]:
            flag = 1
        else:
            flag = 0
            break
        i += 1
        j -= 1
    if flag:
        print("YES! It is a palindrome")
    else:
        print("NO! Not a palindrome")
#isPalindrome()



################################################
##  7. FREQUENCY OF EVERY WORD IN A SENTENCE  ##
################################################
def wordFrequency():
    string = input("Enter a string: ")
    dict = {}
    dstring = []
    for i in string.split(" "):
        if i not in dstring:
            dstring.append(i)
    for word in dstring:
        count = 0
        for i in string.split(" "):
            if i == word:
                count += 1
        dict[word] = count
        # print("Frequency of the word [" + word + "] is: ", count)
    print("The required frequencies are: ")
    print(dict)
#wordFrequency()



################################
##  8. SUBSTRING IN A STRING  ##
################################
# ??? Split the mainstr into smaller strings of length equal to the substring's length
# and chuck them into an array and then check if it exists.
def isSubstring():
    mainstring = input("Enter a string: ")
    substring = input("Enter a substring: ")
    sl = len(substring)
    ml = len(mainstring)
    splits = {}
    flag = 0
    for i in range (0, (ml - sl + 1)):
        word = ""
        for j in range(i, (i + sl)):
            word += mainstring[j]
            splits[i] = word
    for key, value in splits.items():
        if value == substring:
            flag = 1
            position = key
            break
    if flag == 1:
        print("SUCCESS!")
        print("Given substring EXISTS in the given string starting from Index: " + str(position))
    else:
        print("ERROR!")
        ("Substring DOES NOT EXIST in the given string")
#isSubstring()