Php algorithm instance sharing, php algorithm instance

Php algorithm instance sharing, php algorithm instance

Print 0 only

The specific number is determined by the input parameter n.

If n = 5, 00000 is printed.

<?php  $n = $_GET['n'];  for ($i=0; $i < $n; $i++) {    echo "0";  }?>

Print a row 0101010101010101010101

The specific number is determined by the input parameter n.

Such as test. php? N = 3 Print 010

<?php  $n = $_GET['n'];  for ($i=0; $i < $n; $i++) {    if ($i % 2 ==0) {      echo "0";    } else{      echo "1";    }  }?>

1 00 111 0000 11111

For if implementation

<?phpfor ($i = 0; $i < 10; $i++) {  for ($j = 0; $j <= $i; $j++) {    if ($i % 2 == 0) {      echo '0';    } else {      echo '1';    }  }  echo '<br/>';}?>

For switch implementation

<?phpfor ($i = 0; $i < 10; $i++) {  for ($j = 0; $j <= $i; $j++) {    switch ($j % 2) {      case '0':      echo "0";      break;    case '1':      echo "1";      break;    }  }  echo '<br/>';}?>

While if implementation

While switch implementation

<?php$i = 0;while ($i < 10) {  $j = 0;  while ($j <= $i) {    switch ($i % 2) {      case 0:        echo '0';        break;      case 1:        echo '1';        break;    }    $j++;  }  echo '<br/>';  $i++;}?>

Implement 0 01 010 0101 ......

0 01 012 0123 3210 210 10 0

Make a calculator

Such as test. php? A = 1 & B = 2 & operator = jia output 3

Such as test. php? A = 5 & B = 2 & operator = jian output 3

Such as test. php? A = 2 & B = 5 & operator = cheng output 10

Such as test. php? A = 6 & B = 3 & operator = chu output 2

<?php  $a = $_GET['a'];  $b = $_GET['b'];  $operator = $_GET['operator'];  function calculate($a,$b,$operator) {    switch ($operator) {      case 'jia':        $result = $a + $b;        return $result;        break;      case 'jian':        $result = $a - $b;        return $result;      break;      case 'cheng':        $result = $a * $b;        return $result;      break;      case 'chu':        $result = $a / $b;        return $result;      break;    }  }  echo calculate($a,$b,$operator);?>

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