Remove All Vowels

#include <iostream>
#include <cstring>
#include <cctype>

std::string disenvowel(const char* source) {
    const char* vowels = "aeiou";
    std::string result;
    int i=0;
    while (source[i]) {
        if (!strchr(vowels, tolower(source[i])))
            result += source[i];
        ++i;
    }
    return result;
}

int main() {
    std::cout << disenvowel("This is A TEST...") << endl;
    return 0;
}