Write a code to remove duplicates in a string.
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Answer / Prince Gupta
One way to remove duplicates from a string is by using an array and sorting:
```c
#include <stdio.h>n#include <string.h>nnint compare(const void *a, const void *b) {n return strcmp(*(const char *)a, *(const char *)b);
}nnvoid removeDuplicates(char str[]) {n int unique_chars[256] = {0}; /* Assuming ASCII */n int unique_count = 0;n int i;
for (i = 0; str[i] != ' '; ++i)
if (!unique_chars[str[i]]) {n unique_chars[str[i]] = 1;n unique_count++;n }
printf("Unique characters: ");
for (i = 0; i < 256; ++i)
if (unique_chars[i])
putchar(i);
}nnint main() {n char str[] = "abcdefghijklmnopqrstuvwxyzabcd";
removeDuplicates(str);
printf("n");
return 0;
}n
```
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