모음 제거

문제 설명
영어에선 a, e, i, o, u 다섯 가지 알파벳을 모음으로 분류합니다. 문자열 my_string이 매개변수로 주어질 때 모음을 제거한 문자열을 return하도록 solution 함수를 완성해주세요.

#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h> // Include for strlen and strchr function declarations

char* solution(const char* my_string) {
    size_t len = strlen(my_string);
    char* answer = (char*)malloc((len + 1) * sizeof(char)); // Allocate memory
    
    int idx = 0; 
    
    for (size_t i = 0; i < len; i++) {
        char current_char = my_string[i];
        
        if (!strchr("aeiou", current_char)) {
            answer[idx++] = current_char;
        }
    }
    
    answer[idx] = '\0'; 
    
    return answer;
}