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  1. #include <stdio.h>
  2.  
  3. int fromHex(char c)
  4. {
  5.     if (c >= '0' && c <= '9')
  6.         return c - '0';
  7.     if (c >= 'a' && c <= 'f')
  8.         return 10 + (c - 'a');
  9.     if (c >= 'A' && c <= 'F')
  10.         return 10 + (c - 'A');
  11.     return -1; // unexpected char
  12. }
  13.  
  14. int main()
  15. {
  16.     char a[] = "b159";
  17.     int inHex[3];
  18.     inHex[0] = fromHex(a[0]);
  19.     inHex[1] = fromHex(a[1]) * 16 + fromHex(a[2]);
  20.     inHex[2] = fromHex(a[3]);
  21.     printf("%d %d %d\n", inHex[0], inHex[1], inHex[2]);
  22.     printf("0x%x 0x%x 0x%x\n", inHex[0], inHex[1], inHex[2]);
  23. }
  24.  
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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Standard input is empty
stdout
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11 21 9
0xb 0x15 0x9
https://ideone.com/FVtrQh
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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