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Remove Duplicate Characters from a String

Code

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

void remove_duplicates(char *str) 
{
    int len = strlen(str);
    for(int i=0; i<len; i++)
    {
        for (int j=i+1; j<len; j++)
        {
            if(str[i] == str[j])
            {
                for(int k=j; k<len; k++)
                {
                    str[k] = str[k+1];
                }
                len--;
            }
        }
    }   

	
}

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