Remove Duplicate Characters from a String

Code

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

void remove_duplicates(char *str) {
	//Your logic here
   int i, j, k;
    int len = strlen(str);

    for (i = 0; i < len; i++) {
        for (j = i + 1; j < len; ) {
            if (str[i] == str[j]) {
                // shift left
                for (k = j; k < len; k++) {
                    str[k] = str[k + 1];
                }
                len--;  // reduce length
            } else {
                j++;
            }
        }
    }
    }

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

 

 

 

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Input

programming

Expected Output

progamin