大家讲道理2017-04-18 10:52:05
Some things have less code, but think again and don’t measure the workload by the amount of code.
The multiplication table is a double for loop, and the binary word segmentation method is also a double for loop.
Nine-Nine Returns to One:
<?php
for ($x=1;$x<=9;$x++) {
for ($y=1;$y<=$x;$y++) {
echo $y.'*'.$x.'='.$y*$x."\t";
}
echo "\n";
}
for ($x=9;$x>=1;$x--) {
for ($y=1;$y<=$x;$y++) {
echo $y.'*'.$x.'='.$y*$x."\t";
}
echo "\n";
}
?>
1*1=1
1*2=2 2*2=4
1*3=3 2*3=6 3*3=9
1*4=4 2*4=8 3*4=12 4*4=16
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25
1*4=4 2*4=8 3*4=12 4*4=16
1*3=3 2*3=6 3*3=9
1*2=2 2*2=4
1*1=1Binar participle:
<?php
if(preg_match_all('%[\x{4e00}-\x{9fa5}]%u', '天王盖地虎', $matches)) {
//$matches[0] 为 array('天', '王', '盖', '地', '虎')
$size = count($matches[0]);
for($i=0;$i<=$size-2;$i++) {
$word = '';
for($j=0;$j<2;$j++) {
$word .= $matches[0][$i+$j];
}
echo $word."\n";
}
}
?>
天王
王盖
盖地
地虎
巴扎黑2017-04-18 10:52:05
Absolutely not normal, it can’t even double-layer for circulate, are you sorry?
PHPz2017-04-18 10:52:05
It’s normal. I’ve been working for several years and I’ve even forgotten what the Yang Hui Triangle is
