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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <math.h>		// No GSL...
  4. #include <string.h>
  5.  
  6. int main (int argc, char *argv[]) {
  7.  
  8. 	// Can't pass args in ideone. Hardcode value
  9.     char *wrapper = "110100111001001";
  10.  
  11.     int length, llo, i;
  12.     long double sum=0;
  13.  
  14.     while ( *wrapper && ( *wrapper == '0' ) ) wrapper++;
  15.  
  16.     length = strlen(wrapper);
  17.     llo = length - 1;
  18.  
  19.     for ( i = 0; i < length; i++ ) {
  20.         if ( wrapper[llo-i] >= '0' && wrapper[llo-i] <= '1' ) {
  21.             int x = wrapper[llo-i] - 48;
  22.             sum += x * (int)pow(2,i);
  23.         }
  24.  
  25.         else printf("Some error.\n");
  26.     }
  27.  
  28.     printf("%.0Lf\n", sum);
  29.  
  30. return 0;
  31. }
Success #stdin #stdout 0s 2248KB
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Standard input is empty
stdout
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27081
https://ideone.com/2ECduk
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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