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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. int main(void){
  6. 	char input[1024];
  7. 	char result[2*sizeof(input)];
  8. 	int length = 0;// The length of the input
  9. 	FILE *openFile = stdin;//fopen("input.txt", "r");
  10.  
  11. 	if(!openFile){
  12. 		perror("fopen:");
  13. 		exit(EXIT_FAILURE);
  14. 	}
  15.  
  16. 	while(fgets(input, 1024, openFile)){
  17. 		char *p = strchr(input, '\n');
  18. 		if(!p){
  19. 			fprintf(stderr, "Input too long!\n");
  20. 			exit(EXIT_FAILURE);
  21. 		}
  22. 		*p = 0;//chomp newline
  23. 		length = p - input;
  24. 		if(*input == '.' && !input[1]){
  25. 			puts("c u!");
  26. 			return 0;
  27. 		}
  28. 		//conversion
  29. 		int resultLength = 0;
  30. 		int i, j;
  31. 		for(i = 0; i < length; i = j){
  32. 			int count = 1;
  33. 			for(j = i + 1; input[i] == input[j]; ++j)
  34. 				++count;
  35.  
  36. 			while(count > 9){
  37. 				result[resultLength++] = '9';
  38. 				result[resultLength++] = input[i];
  39. 				count -= 9;
  40. 			}
  41. 			result[resultLength++] = count + '0';
  42. 			result[resultLength++] = input[i];
  43. 		}
  44. 		result[resultLength] = 0;
  45.  
  46. 		//Print out the result
  47. 		printf("The next element in the sequence is: %s\n", result);
  48. 	}
  49. 	fclose(openFile);
  50. 	return 0;
  51. }
Success #stdin #stdout 0s 9416KB
comments (?)
stdin 
21
114421
111111111111
.
stdout 
The next element in the sequence is: 1211
The next element in the sequence is: 21241211
The next element in the sequence is: 9131
c u!
https://ideone.com/UTqqXL
language:
C99 (gcc 8.3)
created:
8 years ago
visibility:
public

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