CODEWITHSUNDEEP
python
jugal patil
jugal patil

Reputation: 3

display count of those repeating characters

Accept 2 strings S1 and S2. Display all the characters that are common in both the strings. Also, display count of those repeating characters.

So far I'm able to collect two strings and display characters that are common in both the stings, but not able to understand how to display the count of repeating characters.

# Python3 program

MAX_CHAR=26

def printCommon( s1, s2): 
    a1 = [0 for i in range(MAX_CHAR)] 
    a2 = [0 for i in range(MAX_CHAR)] 

    length1 = len(s1) 
    length2 = len(s2) 

    for i in range(0,length1): 
        a1[ord(s1[i]) - ord('a')] += 1

    for i in range(0,length2): 
        a2[ord(s2[i]) - ord('a')] += 1

    for i in range(0,MAX_CHAR): 
        if (a1[i] != 0 and a2[i] != 0): 

            for j in range(0,min(a1[i],a2[i])): 
                ch = chr(ord('a')+i) 
                print (ch, end=' ') 

if __name__=="__main__":
  s1=input("Enter first string:")
  s2=input("Enter second string:")
  print("Common Characters in Alphabetical Orders")
  printCommon(s1, s2);

How can I collect and display the count of repeating characters?

Upvotes: 0

Views: 54

Answers (1)

MatsLindh
MatsLindh

Reputation: 52832

You can find the intersection (i.e. characters that are present in both) by using the built-in set datatype in Python:

common = set(S1) & set(S2)

You can then count the occurrences of these characters either by using collections.Counter with both strings and iterating over the common letters, or iterating over the common letters and finding the count for each in S1 and S2:

import collections

common = set(S1) & set(S2)
c = collections.Counter(S1 + S2)

for char in common:
  print(char, c[char])

Upvotes: 1

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