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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. char* remove_duplicated(char* str, int size) {
  5. 	int frequency[256] = {0};
  6. 	char* new_str = malloc(size);
  7. 	int new_size = 0;
  8.  
  9. 	for(int i=0; str[i]!='\0'; i++)
  10. 	{
  11. 		if(frequency[(unsigned char) str[i]] == 0) {
  12.     		frequency[(unsigned char) str[i]]++;
  13.     		new_str[new_size] = str[i];
  14.     		new_size++;
  15. 		}
  16. 	}
  17.  
  18. 	new_str[new_size] = '\0';
  19.  
  20. 	return new_str;
  21. }
  22.  
  23. int main(void) {
  24.  
  25. 	char str[30] = "aaabbbcccAXXYYZZZZ";
  26. 	int count[30] = {0};
  27. 	char* new_str = remove_duplicated(str, 30);
  28.  
  29. 	for(int i=0; new_str[i] != '\0'; i++)
  30. 	{
  31.    		for(int j=0; str[j]!='\0'; j++)
  32.    		{
  33.        		if(new_str[i]==str[j])
  34.            		count[i]++;
  35.    		}
  36. 	}
  37.  
  38. 	for(int i=0; new_str[i]!='\0'; i++)
  39.     	printf("%c occurs %d times \n", new_str[i], count[i]);
  40.  
  41.     free(new_str);
  42.  
  43. 	return 0;
  44. }
  45.  
Success #stdin #stdout 0s 2300KB
comments (?)
stdin
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Standard input is empty
stdout
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a occurs 3 times 
b occurs 3 times 
c occurs 3 times 
A occurs 1 times 
X occurs 2 times 
Y occurs 2 times 
Z occurs 4 times
https://ideone.com/KnkwGX
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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