C Program to Count the Number of Vowels, Consonants and so on

Program to count vowels, consonants, etc.

 #include <ctype.h> #include <stdio.h> int main() { char line[150]; int vowels, consonant, digit, space; // initialize all variables to 0 vowels = consonant = digit = space = 0; // get full line of string input printf("Enter a line of string: "); fgets(line, sizeof(line), stdin); // loop through each character of the string for (int i = 0; line[i] != '\0'; ++i) { // convert character to lowercase line[i] = tolower(line[i]); // check if the character is a vowel if (line[i] == 'a' || line[i] == 'e' || line[i] == 'i' || line[i] == 'o' || line[i] == 'u') { // increment value of vowels by 1 ++vowels; } // if it is not a vowel and if it is an alphabet, it is a consonant else if ((line[i] >= 'a' && line[i] <= 'z')) { ++consonant; } // check if the character is a digit else if (line[i] >= '0' && line[i] <= '9') { ++digit; } // check if the character is an empty space else if (line[i] == ' ') { ++space; } } printf("Vowels: %d", vowels); printf("\nConsonants: %d", consonant); printf("\nDigits: %d", digit); printf("\nWhite spaces: %d", space); return 0; } 

Output

 Enter a line of string: C++ 20 is the latest version of C++ yet. Vowels: 9 Consonants: 16 Digits: 2 White spaces: 8 

Here, the string entered by the user is stored in the line variable.

Initially, the variables vowel, consonant, digit, and space are initialized to 0.

Then, a for loop is used to iterate over the characters of the string. In each iteration, we:

• convert the character to lowercase using the tolower() function
• check whether the character is a vowel, a consonant, a digit, or an empty space. Suppose the character is a consonant. Then, the consonant variable is increased by 1.

When the loop ends, the number of vowels, consonants, digits, and white spaces are stored in variables vowel, consonant, digit, and space respectively.

Note: We have used the tolower() function to simplify our program. To use this function, we need to import the ctype.h header file.