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  1. #include <stdio.h>
  2.  
  3. char *itoa(int ival, char *str, int radix)
  4. {
  5. 	static const char table[] = "01";
  6. 	char	*head = str;
  7. 	char	*tail = str;
  8. 	char	tmp;
  9.  
  10. 	if (ival == 0) {
  11. 		*tail++ = '0';
  12. 	} else {
  13. 		for (; ival; ival /= radix) {
  14. 			*tail++ = table[ival % radix];
  15. 		}
  16. 	}
  17. 	*tail = '\0';
  18. 	for (tail--; head < tail; head++, tail--) {
  19. 		tmp = *head;
  20. 		*head = *tail;
  21. 		*tail = tmp;
  22. 	}
  23. 	return str;
  24. }
  25.  
  26. int main()
  27. {
  28. 	char	s[33];
  29. 	int	A, B;
  30.  
  31. 	scanf("%d", &A);
  32. 	B = A << 3;
  33. 	itoa(A, s, 2);
  34. 	printf("A=%d %s\n", A, s);
  35. 	itoa(B, s, 2);
  36. 	printf("B=%d %s\n", B, s);
  37. 	return 0;
  38. }
  39.  
Success #stdin #stdout 0.02s 1680KB
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stdin
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10
stdout
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A=10 1010
B=80 1010000
https://ideone.com/FG5js
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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