kann Operator in php

Question

nicht anzeigen

Ich versuche, ein Mathe-Spiel zu machen, in dem zwei Zahlen erzeugt werden und entweder addiert werden oder voneinander subtrahiert werden, jedes Mal wenn Sie die Antwort schreiben. Ich kann die Zahlen zur Anzeige bringen, aber ich kann den Bediener nicht zur Anzeige bringen. Wie würde ich das tun? hier ist mein Code:

php

<?php 

$num1 = rand(0, 20); 
$num2 = rand(0, 20); 

$operators = array(
    "+", 
    "-", 
); 

switch ($operators[array_rand($operators)]) { 
    case "+": 
     $result = $num1 + $num2; 
     break; 
    case "-": 
     $result = $num1 - $num2; 
     break; 
} 
    echo' 
     <div class="row">     
      <div class="col-md-3 col-md-offset-1">'. $num1 .'</div> 
      <div class="col-md-3 col-md-offset-1">'. $operators .'</div> 
      <div class="col-md-3 col-md-offset-1">'. $num2 .'</div> 

     </div>   
     ' 
?> 

Answer 1

<?php 

$num1 = rand(0, 20); 
$num2 = rand(0, 20); 

$operators = array(
    "+", 
    "-", 
); 
$operator = $operators[array_rand($operators)]; 
switch ($operator) { 
    case "+": 
     $result = $num1 + $num2; 
     break; 
    case "-": 
     $result = $num1 - $num2; 
     break; 
} 
    echo' 
     <div class="row">     
      <div class="col-md-3 col-md-offset-1">'. $num1 .'</div> 
      <div class="col-md-3 col-md-offset-1">'. $operator .'</div> 
      <div class="col-md-3 col-md-offset-1">'. $num2 .'</div> 

     </div>   
     ' 
?> 

Answer 2

versuchen so somethinf ...

<?php 

$num1 = rand(0, 20); 
$num2 = rand(0, 20); 

$operators = array("+","-", 
); 
$operator = $operators[array_rand($operators)]; 
switch ($operator) { 
    case "+": 
     $result = $num1 + $num2; 
     break; 
    case "-": 
     $result = $num1 - $num2; 
     break; 
} 
    echo' 
     <div class="row"> 
      <div class="col-md-3 col-md-offset-1">'. $num1 .'</div> 
      <div class="col-md-3 col-md-offset-1">'. $operator.'</div> 
      <div class="col-md-3 col-md-offset-1">'. $num2 .'</div> 

     </div> 
     ' 
?> 

Answer 3

<?php 

$num1 = rand(0, 20); 
$num2 = rand(0, 20); 

$operators = array(
    "+", 
    "-", 
); 



switch ($operator=$operators[array_rand($operators)]) { 
    case "+": 
     $result = $num1 + $num2; 
     break; 
    case "-": 
     $result = $num1 - $num2; 
     break; 
} 
    echo' 
     <div class="row">     
      <div class="col-md-3 col-md-offset-1">'. $num1 .'</div> 
      <div class="col-md-3 col-md-offset-1">'. $operator .'</div> 
      <div class="col-md-3 col-md-offset-1">'. $num2 .'</div> 


     </div>   
     ' 
?>