title: Even Fibonacci Numbers Sum
signature: function even_fibonacci_numbers_sum(limit)
test_code: using Printf
  
  # SOLUTION CODE
  # ============================================
  PLACEHOLDER_CODE_BODY
  
  # TESTING CODE 
  # ============================================
  function validate_solution(actual, expected)
      return actual == expected
  end
  
  function driver(limit, expected)
      try
  
          if validate_solution(PLACEHOLDER_FN_NAME(limit), expected)
              return "PASSED";
          end
          return "FAILED";
      catch exception_obj
          return string(Base.typename(typeof(exception_obj)).wrapper);
      end
  end
  
  function main()
      
      result = driver(67, 44);
      @printf("TEST-0...%s\n",result);
      
      result = driver(89, 44);
      @printf("TEST-1...%s\n",result);
      
      result = driver(12, 10);
      @printf("TEST-2...%s\n",result);
      
      result = driver(94, 44);
      @printf("TEST-3...%s\n",result);
      
      result = driver(96, 44);
      @printf("TEST-4...%s\n",result);
      
      result = driver(25, 10);
      @printf("TEST-5...%s\n",result);
      
      result = driver(49, 44);
      @printf("TEST-6...%s\n",result);
      
      result = driver(8, 10);
      @printf("TEST-7...%s\n",result);
      
      result = driver(33, 10);
      @printf("TEST-8...%s\n",result);
      
      result = driver(59, 44);
      @printf("TEST-9...%s\n",result);
      
  end
  
  main()
source_py: def even_fibonacci_numbers_sum(limit):
      if (limit < 2):
          return 0
      ef1 = 0
      ef2 = 2
      sm = (ef1 + ef2)
      while (ef2 <= limit):
          ef3 = ((4 * ef2) + ef1)
          if (ef3 > limit):
              break
          ef1 = ef2
          ef2 = ef3
          sm = (sm + ef2)
      return sm
source_cpp: int even_fibonacci_numbers_sum(int limit) {
    if ( limit < 2 ) return 0;
    long long int ef1 = 0, ef2 = 2;
    long long int sum = ef1 + ef2;
    while ( ef2 <= limit ) {
      long long int ef3 = 4 * ef2 + ef1;
      if ( ef3 > limit ) break;
      ef1 = ef2;
      ef2 = ef3;
      sum += ef2;
    }
    return sum;
  }