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int LFSR_Fibonacci (void)
{
  static unsigned long S = 0x00000001;
  S = ((((S >> 31) ^ (S >> 30) ^ (S >> 29) ^ (S >> 27) ^ (S >> 25) ^ S )) & 0x00000001 ) << 31 ) | (S >> 1);
  return S & 0x00000001;
}
 
void main(void){}

prog.c: In function 'LFSR_Fibonacci':
prog.c:4:96: error: expected ';' before ')' token
   S = ((((S >> 31) ^ (S >> 30) ^ (S >> 29) ^ (S >> 27) ^ (S >> 25) ^ S )) & 0x00000001 ) << 31 ) | (S >> 1);
                                                                                                ^
prog.c:4:96: error: expected statement before ')' token
prog.c:4:98: error: expected expression before '|' token
   S = ((((S >> 31) ^ (S >> 30) ^ (S >> 29) ^ (S >> 27) ^ (S >> 25) ^ S )) & 0x00000001 ) << 31 ) | (S >> 1);
                                                                                                  ^
prog.c: At top level:
prog.c:8:6: warning: return type of 'main' is not 'int' [-Wmain]
 void main(void){}
      ^

Standard output is empty