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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <math.h>
  4.  
  5. int HEX_TO_DEC(char st[10])
  6. {
  7.   int i, s, k, p;
  8.   s = 0;
  9.   p = strlen(st)-1;
  10.   for (i = 0; p>=0; i++, p--)
  11.   {
  12.     k=toupper(st[i]);
  13.     s+=((k>='A')?10+k-'A':k-'0')*pow(16,p);
  14.   }
  15.   return s;
  16. }
  17.  
  18. int main()
  19. {
  20.   char st[10];
  21.   scanf ("%s",  &st) ;
  22.   printf ("Result: %d\n",HEX_TO_DEC(st));
  23.   return 0; 
  24. }
Success #stdin #stdout 0.01s 1724KB
comments (?)
stdin
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123ABC
stdout
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Result: 1194684
https://ideone.com/DgWd6
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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