只打印0
具體個數(shù)由輸入的參數(shù)n決定
如n=5就打印00000
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<?php $n = $_GET['n']; for ($i=0; $i < $n; $i++) { echo "0"; }?> |
打印一行 0101010101010101010101
具體個數(shù)由輸入的參數(shù)n決定
如test.php?n=3打印010
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<?php $n = $_GET['n']; for ($i=0; $i < $n; $i++) { if ($i % 2 ==0) { echo "0"; } else{ echo "1"; } }?> |
實現(xiàn)1 00 111 0000 11111
for if 實現(xiàn)
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<?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 實現(xiàn)
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<?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 實現(xiàn)
while switch 實現(xiàn)
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<?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++;}?> |
實現(xiàn)0 01 010 0101……
實現(xiàn)0 01 012 0123 3210 210 10 0
做個計算器
如test.php?a=1&b=2&operator=jia輸出3
如test.php?a=5&b=2&operator=jian輸出3
如test.php?a=2&b=5&operator=cheng輸出10
如test.php?a=6&b=3&operator=chu輸出2
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<?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內容了，希望大家能夠喜歡。
