PHP implementation Yang Hui triangle example

example, PHP implementation of the Yang Hui Triangle code. error_reporting (0); $iLine = 5; Function of output Yang Hui triangle function Yanghui ($iLine) { for ($i = 0; $i <= $iLine; $i + +)//Line { for ($j = 0; $j <= $i; $j + +)//Column { if ($i = = $j)//row = column (i.e. last column) or first row and first column { $a [$i] [$j] = 1; echo $a [$i] [$j]. " "; } else if ($i! = 0 && $j = = 0)//row = column (i.e. last column) or first row and first column { $a [$i] [$j] = 1; echo $a [$i] [$j]. " "; } Else { $a [$i] [$j] = $a [$i -1][$j]+ $a [$i -1][$j -1];//row + Column value = Add 2 values to the previous row echo $a [$i] [$j]. " "; } } } return $a; } Call example, print Yang Hui triangle Yanghui (5); ?> Copy Code

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