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  1. #include <stdio.h>
  2.  
  3. void print_binary(char* out, unsigned int number, unsigned int size)
  4. {
  5. 	//char out[size + 1];
  6. 	memset(out, '0', size);
  7.  
  8. 	unsigned int i = 0;
  9.     for (unsigned int n = number; n; n = n >> 1) {
  10.     	if (i <= size) {
  11.          out[size - i -1] = '0'+(n&1);
  12.     	}
  13.     	i++;
  14.     }
  15.     out[size] = '\0';
  16.  
  17.     //putc('!', out);
  18.     //printf("%s", out);
  19.     //return out;
  20. }
  21.  
  22. int main(void) {
  23. 	char fourtytwo[8];
  24. 	print_binary(fourtytwo, 42, 8);
  25. 	printf("%s\n", fourtytwo);
  26.  
  27. 	char zero[16];
  28. 	print_binary(zero, 0, 16);
  29. 	printf("%s\n", zero);
  30.  
  31. 	char minusfourtytwo[48];
  32. 	print_binary(minusfourtytwo, -12, 48);
  33. 	printf("%s\n", minusfourtytwo);
  34. 	return 0;
  35. }
  36.  
Success #stdin #stdout 0s 5276KB
comments (?)
stdin
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Standard input is empty
stdout
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00101010
0000000000000000
000000000000000011111111111111111111111111110100
https://ideone.com/9EkevC
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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