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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. int main(int argc, char * argv[]) {
  5. 	char* input = "31344842";
  6. 	int digit_count = 0;
  7.  
  8. 	digit_count = strlen(input); //count amount of digits in input
  9.  
  10.  
  11. 	//count number of times a digit has appeared
  12. 	int digit_amount[10] = {0,0,0,0,0,0,0,0,0,0};
  13. 	int digit = 0;
  14. 	while(digit<10)
  15. 	{
  16. 	    int count = 0;
  17. 	    char* singleDigit[1];
  18. 	    while(count <= digit_count)
  19. 	    {
  20. 	        // Subtracting the character 0 from a character will give you its real int value
  21. 	        if((input[count] - '0') == digit)
  22. 	        {
  23. 	            digit_amount[digit]++;
  24. 	        }
  25. 	        count++;
  26. 	    }
  27. 	    digit++;
  28. 	}
  29. 	//final output
  30. 	printf("Repeated digits:\n");
  31. 	int k = 0;
  32. 	while(k<10)
  33. 	{
  34. 	    if(digit_amount[k] >= 2)
  35. 	    {
  36. 	        printf("\"%i\" occurs %i times.\n",k,digit_amount[k]);
  37. 	    }
  38. 	    k++;
  39. 	}
  40. 	return 0;
  41. }
  42.  
  43.  
Success #stdin #stdout 0s 2156KB
comments (?)
stdin
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Standard input is empty
stdout
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Repeated digits:
"3" occurs 2 times.
"4" occurs 3 times.
https://ideone.com/F0PTFz
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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