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  1. #include <stdio.h>
  2. #include <setjmp.h>
  3.  
  4. int abs(int value) {
  5. 	jmp_buf buf;
  6. 	char buffer[16];
  7. 	snprintf(buffer, sizeof(buffer), "%d+", value);
  8. 	char *cursor = buffer;
  9. 	switch (setjmp(buf)) {
  10. 		case 0:
  11. 			++cursor;
  12. 			longjmp(buf, *cursor);
  13. 		case '-':
  14. 			*cursor = ' ';
  15. 			++cursor;
  16. 			longjmp(buf, *cursor);
  17. 		case '+':
  18. 			*cursor = '\0';
  19. 			sscanf(buffer, "%d", &value);
  20. 			return value;
  21. 		default:
  22. 			++cursor;
  23. 			longjmp(buf, *cursor);
  24. 	}
  25. }
  26.  
  27. int main(void) {
  28. 	int value;
  29. 	while (1 == scanf("%d", &value)) {
  30. 		printf("%d\n", abs(value));
  31. 	}
  32. 	return 0;
  33. }
  34.  
Success #stdin #stdout 0s 2164KB
comments (?)
stdin 
3
-60
60
120
-120
stdout 
3
60
60
120
120
https://ideone.com/PetGBe
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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