Remove Duplicate Characters from a String

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

void remove_duplicates(char *str) {
	//Your logic here
    int len = 0, count = 0, present = 0, write =0;

    while(str[count] != '\0'){
        for(int i = count-1; i>=0; i--){
            if(str[count]==str[i]){
                present =1;
                break;
            }
        }
        if(present != 1){
            str[write] = str[count];
            write++;
        }
        count++;
        present = 0;
    }
    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;
}