用二维数组写出九九乘法表

[yixi_xiangyi]

<?php
//用二维数组写出九九乘法表
$array = array();
for($i=1; $i<=9; $i++)
{
for($j = 1; $j <= $i; $j++)
{
$array[$j . '*' . $i] = $i * $j;
}
}
echo '<pre>';
print_r($array);

?>

其中$array[$j . '*' . $i] = $i * $j;这句能不能换成用二维数组的方式输出？谢谢了

[Liv2005]

$array[$j-1][$i-1] = $i * $j
这样？

[黄袍披身]

作业又来了...上次已经有个学生问过了。

[yixi_xiangyi]

可是我想用二维数组写的，不过还是谢谢你了。

[yixi_xiangyi]

高手帮帮忙解决下，好不好，急

[heyli]

for($a =1;$a<=9;$a++)
{ 
  for($b =1;$b<=$a;$b++)
  {$c =$a *$b;
    echo "$b*$a=$c  ";
  }
    echo "<p>";
}

[xuzuning]

//用二维数组写出九九乘法表
$array = array();
for($i=1; $i<=9; $i++)
{
  for($j = 1; $j <= $i; $j++)
  {
    $array[$j][$i] = $i * $j;
  }
}
echo '<pre>';  
print_r($array);

Array
(
    [1] => Array
        (
            [1] => 1
            [2] => 2
            [3] => 3
            [4] => 4
            [5] => 5
            [6] => 6
            [7] => 7
            [8] => 8
            [9] => 9
        )

    [2] => Array
        (
            [2] => 4
            [3] => 6
            [4] => 8
            [5] => 10
            [6] => 12
            [7] => 14
            [8] => 16
            [9] => 18
        )

    [3] => Array
        (
            [3] => 9
            [4] => 12
            [5] => 15
            [6] => 18
            [7] => 21
            [8] => 24
            [9] => 27
        )

    [4] => Array
        (
            [4] => 16
            [5] => 20
            [6] => 24
            [7] => 28
            [8] => 32
            [9] => 36
        )

    [5] => Array
        (
            [5] => 25
            [6] => 30
            [7] => 35
            [8] => 40
            [9] => 45
        )

    [6] => Array
        (
            [6] => 36
            [7] => 42
            [8] => 48
            [9] => 54
        )

    [7] => Array
        (
            [7] => 49
            [8] => 56
            [9] => 63
        )

    [8] => Array
        (
            [8] => 64
            [9] => 72
        )

    [9] => Array
        (
            [9] => 81
        )

)

[yixi_xiangyi]

我要的结果是这样的，不好意思，没说明好：

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

[yixi_xiangyi]

<?php
$array = array();
for($i=1; $i<=9; $i++)
{
for($j = 1; $j <= $i; $j++)
{
$array[$j][$j . '*' . $i] = $i * $j;
//echo $array;
}
}
echo '<pre>';
print_r($array);
?>

输出的结果是：
Array
(
[1] => Array
(
[1*1] => 1
[1*2] => 2
[1*3] => 3
[1*4] => 4
[1*5] => 5
[1*6] => 6
[1*7] => 7
[1*8] => 8
[1*9] => 9
)

[2] => Array
(
[2*2] => 4
[2*3] => 6
[2*4] => 8
[2*5] => 10
[2*6] => 12
[2*7] => 14
[2*8] => 16
[2*9] => 18
)

[3] => Array
(
[3*3] => 9
[3*4] => 12
[3*5] => 15
[3*6] => 18
[3*7] => 21
[3*8] => 24
[3*9] => 27
)

[4] => Array
(
[4*4] => 16
[4*5] => 20
[4*6] => 24
[4*7] => 28
[4*8] => 32
[4*9] => 36
)

[5] => Array
(
[5*5] => 25
[5*6] => 30
[5*7] => 35
[5*8] => 40
[5*9] => 45
)

[6] => Array
(
[6*6] => 36
[6*7] => 42
[6*8] => 48
[6*9] => 54
)

[7] => Array
(
[7*7] => 49
[7*8] => 56
[7*9] => 63
)

[8] => Array
(
[8*8] => 64
[8*9] => 72
)

[9] => Array
(
[9*9] => 81
)

)

可是我想要的结果是
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

[heyli]

我四楼的代码就是你想要的效果
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

[coder]

1个月之后来看结果