Remove Duplicate Characters from a String

Code

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

void remove_duplicates(char *str) {
	//Your logic here
    int visited[256] = {0};
    int i=0,j=0;

    while(str[i] != '\0'){
        char ch = str[i];

        if(!visited[ch]){
            str[j++] = ch;
            visited[ch] = 1;
        }
        i++;
    }
    str[j] = '\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