Remove Duplicate Characters from a String

Code

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
void remove_duplicates(char *str) {
	//Your logic here
    bool seen[256] = {0};
    int read = 0;
    int write = 0;
    while(*(str+read) != '\0'){
        if(!(seen[(unsigned char)(*(str+read))])){
            seen[(unsigned char)(*(str+read))] = true;
            *(str+write) = *(str+read);
            write+=1;
        }
        read+=1;
    }
    *(str+write) = '\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