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2-101==>1,102-201==>2,202-301==>3.该如何解决

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Release： 2016-06-13 13:20:25
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2-101==>1,102-201==>2,202-301==>3...
2,3,4......101===生成1
102,3,4......201===生成2
202,3,4......201===生成3
302,3,4......301===生成4
402,3,4......401===生成5

------解决方案--------------------
2,3,4......101===生成1//除外
n02,3,4......n01===生成n+1

------解决方案--------------------
$n = 2;
echo ceil(($n-1)/100);

这样就可以了，你可以自己验证一下

for($n=2; $n echo $n, ':', ceil(($n-1)/100), PHP_EOL;

Related labels：
100 ceil echo
source：php.cn
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