Question

我有一段python代码，如果变量等于字符串＆＃39; x＆＃39;应该结束，但它没有，我不明白为什么。请有人解释一下

counter = 0
total_price = 0
biggest_price = 0
smallest_price = 10000000000
house_type = 0
while house_type != "x":
    house_type = input("What is the house type? ")
    if house_type != "x":
        number_of_rooms = int(input("How many rooms does the house have? "))
        age = int(input("How old is the house? "))
        price = int(input("What is the houses price? "))
        if price > biggest_price :
            biggest_house_type = house_type
            biggest_rooms = number_of_rooms
            biggest_age = age
            biggest_price = price
    if price < smallest_price :
        smallest_house_type = house_type
        smallest_rooms = number_of_rooms
        smallest_age = age
        smallest_house_price = price
    total_price = total_price + price
    counter = counter + 1
print(biggest_house_type, biggest_rooms, biggest_age, biggest_price)
print(smallest_house_price, smallest_rooms, smallest_age, smallest_price)
print(total_price / counter)

有人可以解释为什么程序在按下X时不会结束，而只是给house_type值＆＃39; x＆＃39;

Answer 1

有很多问题。我试着做一个最小的工作示例。

  <?php
   // Values received via ajax

   $title = $_POST['title'];
   $start = $_POST['start'];
   $end = $_POST['end'];
   $url = $_POST['url'];

  // connection to the database
 try {
  $bdd = new PDO('mysql:host=localhost;dbname=fullcalendar', '....',    '.......');
 } catch(Exception $e) {
   exit('Unable to connect to database.');
 }



  $sql  = "INSERT INTO "
  .   "`evenement` "
  . "SET "
  .   "`title`   = :title, "
  .   "`start`   = :start, " 
  .   "`end`     = :end, " 
  .   "`url`     = :url ";

     $stmt   = $pdo->prepare($sql);
     $result = $stmt->execute(array(':title'=>$title, ':start'=>$start, ':end'=>$end,  ':url'=>$url));
    if (!$result) {
        print_r($pdo->errorInfo());

    }   
?>

输出：

    counter = 0
    total_price = 0
    biggest_price = 0
    smallest_price = 10000000000
    house_type = ''
    while house_type != "x":
        house_type = raw_input("What is the house type? ")
        if house_type != "x":
            number_of_rooms = int(raw_input("How many rooms does the house have? "))
            age = int(raw_input("How old is the house? "))
            price = int(raw_input("What is the houses price? "))
            if price > biggest_price :
                biggest_price = price
            if price < smallest_price :
                smallest_price = price
            total_price = total_price + price
            counter = counter + 1

            print(biggest_price)
            print(smallest_price)
            print(total_price / counter)

注意：
如果您使用的是Python 2.x，请使用raw_input（）。如果您使用的是Python 3.x，请使用input（）

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