Remove Duplicate Characters from a String

Code

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

void remove_duplicates(char *str) {
	//Your logic here
    
    int n = strlen(str);
    for (int i = 0; i < n - 1; i++){
        for (int j = i + 1; j < n; j++){
            if (str[i] == str[j]){
                memmove(str + j, str + j + 1,strlen(str+j+1));
                str[--n] = '\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);
    printf("%s", str);
    return 0;
}

Solving Approach