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php - 也许是一个简单的数组问题

问题描述

我这里有点问题。我已经检查了很多次错误，但我无法让它工作。所以我必须创建一个读取 3 行输入的程序。这是关于一家杂货店，在一周和周末有 2 个不同的价格值。我必须让它只输出水果的价格 * 数量，如果当天或水果不存在，则输出“错误”。我真的很困惑为什么我的代码不起作用。我才开始使用 PHP，所以也许我没有太多经验。

$type = strtolower(readline());
$day = strtolower(readline());
$quantity = floatval(readline());
$days = array("monday", "tuesday", "wednesday", "thursday", "friday");
$weekend = array("saturday", "sunday");
$fruit_normal = array(
    "2.50" => "banana",
    "1.20" => "apple",
    "0.85" => "orange",
    "1.45" => "grapefruit",
    "2.70" => "kiwi",
    "5.50" => "pineapple",
    "3.85" => "grapes"
);
$fruit_we = array(
    "2.70" => "banana",
    "1.25" => "apple",
    "0.90" => "orange",
    "1.60" => "grapefruit",
    "3.00" => "kiwi",
    "5.60" => "pineapple",
    "4.20" => "grapes"
);
$search = array_search($day, $days);
$search1 = array_search($day, $weekend);
$search2 = array_search($type, $fruit_normal);
$search3 = array_search($type, $fruit_we);
if ($search != NULL && $search2 != NULL) {
    $price = $search2 * $quantity;
    $formatted = number_format($price, 2);
    print $formatted;
} elseif ($search1 != NULL && $search3 != NULL) {
    $price = $search3 * $quantity;
    $formatted = number_format($price, 2);
    print $formatted;
} elseif ($search == NULL && $search1 == NULL && $search2 == NULL && $search3 == NULL) {
    echo "error";
}

标签： php

解决方案

这就是我首先解决问题的方法，我使所有由参数组成的数组仅从 1 开始。然后在检查结果时将所有NULL值替换为我仍然不确定真正的问题是什么，但现在我'会接受就是这样。FALSEarray_search

$type = strtolower(readline());
$day = strtolower(readline());
$quantity = floatval(readline());    
$days = array(1 => "monday", "tuesday", "wednesday", "thursday", "friday");
$weekend = array(1 =>"saturday", "sunday");   
$fruit_normal = array(
    "2.50" => "banana",
    "1.20" => "apple",
    "0.85" => "orange",
    "1.45" => "grapefruit",
    "2.70" => "kiwi",
    "5.50" => "pineapple",
    "3.85" => "grapes"
   );
    $fruit_we = array(
    "2.70" => "banana",
    "1.25" => "apple",
    "0.90" => "orange",
    "1.60" => "grapefruit",
    "3.00" => "kiwi",
    "5.60" => "pineapple",
    "4.20" => "grapes"
    );    
$search = array_search($day, $weekend);
$search1 = array_search($type, $fruit_normal);
$search2 = array_search($type, $fruit_we);
$search3 = array_search($day, $days);    
if($search1!= FALSE && $search3 != FALSE ){
    $price = $search1 * $quantity;
    echo number_format($price, 2); 
}elseif($search != FALSE && $search2 != FALSE){
    $price = $search2 * $quantity;
    echo number_format($price, 2);
}elseif($search == FALSE && $search3 == FALSE){
    echo "error";
}elseif($search1 == FALSE && $search2 == FALSE){
    echo "error";
}

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