C++ Program to Count Vowels in a String

Vowels consist of 5 English letters of the alphabet and these are 'a', 'e', 'i', 'o', and 'u'. In this C++ program, we need to count how many vowels are present in a given string and print the count.

Note: We are including both upper case and lower case alphabets for counting vowels.

Below are the following steps to count vowels:

• Declare a count variable and initialize it with 0.
• Run a for loop for the complete length of the given string.
• Check each character for vowel and increment count by one whenever found.
• Print the total count of vowels.

//C++ Code to count number of vowels in a string
#include<iostream>
using namespace std;

int main(){
   char str[50] = "Algolesson";
   //size of string
   int n = sizeof(str)/sizeof(str[0]);
   int count = 0;

   for(int i = 0; i < n; i++){
    if(str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' || str[i] == 'u' ||
       str[i] == 'A' || str[i] == 'E' || str[i] == 'I' || str[i] == 'O' || str[i] == 'U'){
        count++;
       }
   }

   cout<<"Number of Vowels: "<<count;
   return 0;
}

Number of Vowels: 4