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  1. <?php
  2. $input="123*14+2/2=";
  3. $inputLength=mb_strlen($input);
  4. $number=0;
  5. $result=0;
  6. $op="";
  7.  
  8. for($i = 0; $i < $inputLength; ++$i)
  9. {
  10. 	$char=mb_substr($input, $i, 1);
  11. 	if($char=='*'|| $char=='+'||$char=='-'||$char=='/'||$char=='=')
  12. 	{
  13. 		switch ($op)
  14. 		{
  15. 		case "*":
  16. 			    $result=$result*$number;
  17. 			    break;
  18. 		case "+":
  19. 				$result=$result+$number;
  20. 				break;
  21. 	    case "-":
  22. 	   	       $result=$result-$number;
  23. 	   	       break;
  24. 	   	case "/":
  25. 	   		    $result=$result/$number;
  26. 	   		    break;
  27.  
  28. 	   	default: $result=$number;
  29. 		}
  30. 		if ($char=="="){
  31. 			echo $result;
  32. 			exit();
  33. 		}
  34. 	    $op=$char;
  35. 	    $number=0;
  36.  
  37. 	}
  38.     elseif(is_numeric($char)){
  39.     	$number=$number*10+intval($char);
  40.     }
  41.     else{
  42.     	echo "Неверный символ";
  43.     }
  44. }
  45.  
  46. // your code goes here
Success #stdin #stdout 0.01s 20568KB
comments (?)
stdin 
Standard input is empty
stdout 
862
https://ideone.com/46VDb3
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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