prompt: I want to have a small C program that checks if two strings are anagrams. Can you write me a function that does this?
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: I want to have a small C program that checks if two strings are anagrams. Can you write me a function that does this?
chosen.role: assistant
chosen.content: Absolutely! The easiest way is to use an associative array based on char codes. Here's a sample implementation:
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <stdbool.h>
  #include <string.h>
  
  
  #define ARR_LENGTH 26
  #define CHAR_DIFF 97
  
  bool compare(int *arr1, int *arr2) {
  	for(int i = 0; i < ARR_LENGTH; i++) {
  		if(arr1[i] != arr2[i]) return false;
  	}
  	return true;
  }
  
  int *populate(char *s, int len) {
  	int *arr = malloc(sizeof(int) * ARR_LENGTH);
  	for(int i = 0; i < len; i++) {
  		//Use the ASCII codes to get us the indices of the array. For example, since 'a' is 97, we subtract CHAR_DIFF from it to get 0, the beginning of the array.
  		arr[s[i] - CHAR_DIFF]++;
  	}
  	return arr;
  }
  
  bool anagrams(char *s1, char *s2) {
  	//Get lengths of strings. We can exit early if the lengths are not the same, because they will not be anagrams.
  	int len = strlen(s1);
  	if(len != strlen(s2)) return false;
  	//Populate the associative arrays.
  	int *arr1 = populate(s1, len);
  	int *arr2 = populate(s2, len);
  	//Loop through arrays and check for equality.
  	return compare(arr1, arr2);
  }
  
  int main(int argc, char **argv) {
  	//Get our two strings from the arguments passed to the program in the command line.
  	char *s1 = argv[1];
  	char *s2 = argv[2];
  	bool are_anagrams = anagrams(s1, s2);
  	if(are_anagrams) printf("Anagrams!\n");
  	else printf("Not anagrams!\n");
  }
  
  Note that this version of the code doesn't include error handling and will crash when run without arguments. 
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: I want to have a small C program that checks if two strings are anagrams. Can you write me a function that does this?
rejected.role: assistant