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  1. #include <stdio.h>
  2. #include <string.h>
  3. void htoi(const char *ptr, char *binAddr) {
  4. char value[32] = "";
  5. char ch = *ptr;
  6. int i;
  7. const char* quads[] = {"0000", "0001", "0010", "0011", "0100", "0101",
  8.                      "0110", "0111", "1000", "1001", "1010", "1011",
  9.                      "1100", "1101", "1110", "1111"};
  10.  
  11. while (ch == ' ' || ch == '\t')
  12.     ch = *(++ptr);
  13.  
  14. for (i = 0; i < 8; i++) {
  15.     if (ch >= '0' && ch <= '9')
  16.         strncat(value, quads[ch - '0'], 4);
  17.     if (ch >= 'A' && ch <= 'F')
  18.         strncat(value, quads[10 + ch - 'A'], 4);
  19.     if (ch >= 'a' && ch <= 'f')
  20.         strncat(value, quads[10 + ch - 'a'], 4);
  21.  
  22.     ch = *(++ptr);
  23.  
  24. }
  25.     printf("%s\n", value);
  26. *binAddr = *value;
  27. }
  28.  
  29.  
  30. main()
  31. {
  32. char line[11],  binAddr[32];
  33. char *hexAddr="0x35";
  34. htoi(hexAddr, binAddr);
  35.  
  36. }
Runtime error #stdin #stdout 0s 1832KB
comments (?)
stdin
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Standard input is empty
stdout
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000000110101
https://ideone.com/tko41t
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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