php算法实例分享
author:一佰互联 2019-04-27   click:146

只打印0

  具体个数由输入的参数n决定

  如n=5就打印00000

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

打印一行 0101010101010101010101

  具体个数由输入的参数n决定

  如test.php?n=3打印010

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

实现1 00 111 0000 11111

  for if 实现

<?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 实现

<?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 实现

  while switch 实现

<?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++;}?>

实现0 01 010 0101……

实现0 01 012 0123 3210 210 10 0

做个计算器

  如test.php?a=1&b=2&operator=jia输出3

  如test.php?a=5&b=2&operator=jian输出3

  如test.php?a=2&b=5&operator=cheng输出10

  如test.php?a=6&b=3&operator=chu输出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);?>

以上所述就是本文的全部内容了,希望大家能够喜欢。