Remove Duplicate Characters from a String

Code

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

void remove_duplicates(char *str) {
	int idx = 0;
    int jdx = 0;
    int kdx = 0;

    
    while(str[idx] != '\0') {
        char cc = str[idx];
        jdx = idx + 1;
        while(str[jdx] != '\0') {
            if (cc == str[jdx]) {
                kdx = jdx;
                while(str[kdx] != '\0') {
                    str[kdx] = str[kdx+1];
                    kdx++;
                }
                str[kdx] = '\0';
            }
            jdx++;
        }
        idx++;
    }
}

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