C語言計算字元中元音個數範例

在C語言中，如何計算字元中的元音字元個數？建立一個原始檔：program_to_count_vowels_in_string.c，參考以下實現程式碼 -

#include <stdio.h>

int main() {
    char s[] = "tw511.com";     // String Given
    int i = 0;
    int vowels = 0;            // Vowels counter
    int consonants = 0;        // Consonants counter

    while (s[i++] != '\0') {
        if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u')
            vowels++;
        else
            consonants++;
    }

    printf("'%s' contains %d vowels and %d consonants.\n", s, vowels, consonants);

    return 0;
}

執行上面範例程式碼，得到以下結果 -

'tw511.com' contains 5 vowels and 5 consonants.