function checkPrerequisites($cid, $selectedCourse)
{
$prerequisites = getPrerequisitesStringByCid($cid);
//echo $prerequisites;
$array = transPreToCNF($prerequisites);
//print_r($array);
// $error=array();
$count = 0;
$error = "";
if ($prerequisites != null) {
for ($i = 0; $i < count($array); $i++) {
//1.将array[$i]中的or 解析出来，放在新数组中
$orArray = divOrStringIntoArray($array[$i]);
//2.将这个数组放入profile里面进行查询，返回T or F
//print_r($orArray);
//3. 返回F就给$error赋值，否则继续
if (!isInStu_offering($orArray)) {
if (!isInSelectedCourse($orArray, $selectedCourse)) {
$error .= echoOrString($orArray) . "\n";
$count++;
}
}
}
}
if ($count != 0) {
return $error;
} else {
return "true";
}
}
function checkPrerequisites($cid)
{
$prerequisites = getPrerequisitesStringByCid($cid);
//echo $prerequisites;
$array = transPreToCNF($prerequisites);
//print_r($array);
$error = array();
$count = 0;
$error[$count] = null;
if ($prerequisites != null) {
for ($i = 0; $i < count($array); $i++) {
//1.将array[$i]中的or 解析出来，放在新数组中
$orArray = divOrStringIntoArray($array[$i]);
//2.将这个数组放入profile里面进行查询，返回T or F
//print_r($orArray);
//3. 返回F就给$error赋值，否则继续
if (!isInStu_offering($orArray)) {
$error[$count] = $array[$i];
$count++;
}
}
}
if ($count != 0) {
return false;
} else {
return true;
}
}
/**
* Created by PhpStorm.
* User: Liu
* Date: 10/10/2015
* Time: 4:36 AM
*/
include_once "studentView.php";
include_once "../model/checkPrerequisites.php";
include_once "../model/getStu_offering.php";
include_once "../model/getOffering.php";
session_start();
$sid = $_SESSION['sid'];
$cid = $_POST['cid'];
$lecOid = $_POST['lec'];
$labOid = $_POST['lab'];
$prerequisites = getPrerequisitesStringByCid($cid);
//echo $prerequisites;
$array = transPreToCNF($prerequisites);
//print_r($array);
$error = array();
$count = 0;
$error[$count] = null;
if ($prerequisites != null) {
for ($i = 0; $i < count($array); $i++) {
//1.将array[$i]中的or 解析出来，放在新数组中
$orArray = divOrStringIntoArray($array[$i]);
//2.将这个数组放入profile里面进行查询，返回T or F
//print_r($orArray);
//3. 返回F就给$error赋值，否则继续
if (!isInStu_offering($orArray)) {
$error[$count] = $array[$i];
