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  1. #include <iostream>
  2.  
  3. typedef unsigned char byte;
  4.  
  5. byte calc_iv(byte buffer[])
  6. {
  7.     int iv = 0;
  8.     size_t len = sizeof(buffer); // get buffer size
  9.     for(int i = 0; i < len; i++) {
  10.         byte I = buffer[i];
  11.         iv += I;
  12.         iv *= I + 1;
  13.     }
  14.     return iv / (len);
  15. }
  16.  
  17. int main(){
  18.     byte buf[] = {41, 32, 16};
  19.     byte iv = calc_iv(buf);
  20.  
  21.     std::cout<<(int)iv<<std::endl;
  22.     return 0;
  23. }
  24.  
Success #stdin #stdout 0s 4380KB
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https://ideone.com/hKfDCE
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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