Remove Duplicate Characters from a String

#include <stdio.h>
#include <stdint.h>

void remove_duplicates(char *str, int size) {
	//Your logic here
    for (int i = 0; i < size-1; i++) {
        for (int j = i+1; j < size; j++) {
            if (str[i] == str[j]) {
                for (int k = j; k < size-1; k++) {
                    str[k] = str[k+1];
                }
                size--;
                str[size] = 0;
            }
        }
    }
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    remove_duplicates(str, i);
    printf("%s", str);
    return 0;
}