Remove Duplicate Characters from a String

Code

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

void remove_duplicates(char *str) {
	//Your logic here
    bool bl[26]={false};
    int r = 0, w = 0;
    while(str[r]!='\0'){
        if(!bl[str[r]-'a']){
            bl[str[r]-'a']=true;
            str[w++]=str[r];
        }
        r++;
    }
    str[w]='\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