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Number of Vowels and Consonants in a String

Certification: Basic Level Accuracy: 28% Submissions: 25 Points: 10

Write a C++ program that counts the number of vowels and consonants in a string using pointers. The program should take a string as input and return the count of vowels and consonants.

Example 1
     
  • Input: string = "Hello"
    •  
  • Output: Vowels: 2, Consonants: 3
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  • Explanation: 
       
    • Step 1: Initialize vowel and consonant counters to 0.
      •  
    • Step 2: Initialize a pointer to the start of the string.
      •  
    • Step 3: Iterate through each character of the string using the pointer.
      •  
    • Step 4: For each character, check if it's a vowel (a, e, i, o, u, A, E, I, O, U) and increment the vowel counter if true.
      •  
    • Step 5: If the character is an alphabet and not a vowel, increment the consonant counter.
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    • Step 6: Return the counts (vowels = 2, consonants = 3).
      •  
    •
Example 2
     
  • Input: string = "C++"
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  • Output: Vowels: 0, Consonants: 3
    •  
  • Explanation: 
       
    • Step 1: Initialize vowel and consonant counters to 0.
      •  
    • Step 2: Initialize a pointer to the start of the string.
      •  
    • Step 3: Iterate through each character of the string using the pointer.
      •  
    • Step 4: For each character, check if it's a vowel (a, e, i, o, u, A, E, I, O, U) and increment the vowel counter if true.
      •  
    • Step 5: If the character is an alphabet and not a vowel, increment the consonant counter.
      •  
    • Step 6: Return the counts (vowels = 0, consonants = 3).
      •  
    •
Constraints
     
  • 1 ≤ len(string) ≤ 10^3
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  • String contains printable ASCII characters
    •  
  • Time Complexity: O(n) where n is the length of the string
    •  
  • Space Complexity: O(1)
    •
StringsPointers and ReferencesWalmartSwiggy
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Hint
Solution

Solution Hints

    
  
  • Use pointers to traverse the string.
    • 
  
  • Check if each character is a vowel or consonant.
    • 
  
  • Maintain separate counters for vowels and consonants.
    •

Steps to solve by this approach:

 Step 1: Define a function countVowelsAndConsonants that takes a constant character pointer and two integer references as parameters.

 Step 2: Initialize vowels and consonants counters to zero.

 Step 3: Iterate through each character of the string until the null terminator.

 Step 4: Convert each character to lowercase for consistent checking.

 Step 5: Check if the character is an alphabet letter (between 'a' and 'z').

 Step 6: If it's a vowel (a, e, i, o, u), increment the vowels counter; otherwise, increment the consonants counter.

 Step 7: In main, call countVowelsAndConsonants with a string and two integer variables.

 Step 8: Print the counts of vowels and consonants.

Submitted Code :