在C中将大写转换为小写..(具有挑战性)

#include <ctype.h>
#include<stdio.h>

void convert_to_lowercase(char *str) {
    for (int i = 0; str[i]; i++) {
        str[i] = tolower(str[i]);
    }
}

int main() {
    char str[] = "ConVert Me tO LoWErCasE";
    printf("Original string: %s\n", str);
    convert_to_lowercase(str);
    printf("Lowercase string: %s\n", str);
    return 0;
}