Remove Duplicate Characters from a String

Code

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

void remove_duplicates(char *str) {
	//Your logic here
    uint8_t len = 0, i, j;
    while(str[len] != '\0')
        len++;

    for(i = 0; i < len; i++)
    {
        for(j = i+1; j < len; j++)
        {
            if(str[i] == str[j])
            {
                while(j < len - 1)
                {
                    str[j] = str[j+1];
                    j++;
                }
                j = i;
                len--;
            }
        }
    }
    str[len] = '\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