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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.     int num;
  5.     int binary[32];
  6.     int i = 0;
  7.  
  8.     if (scanf("%d", &num) != 1) {
  9.         return 1;
  10.     }
  11.  
  12.     if (num == 0) {
  13.         printf("0\n");
  14.         return 0;
  15.     }
  16.  
  17.     while (num > 0) {
  18.         binary[i] = num % 2;
  19.         num = num / 2;
  20.         i++;
  21.     }
  22.  
  23.     for (int j = i - 1; j >= 0; j--) {
  24.         printf("%d", binary[j]);
  25.     }
  26.     printf("\n");
  27.  
  28.     return 0;
  29. }
Success #stdin #stdout 0s 5256KB
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https://ideone.com/UvZnE8
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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