我有一个程序，它可以检测单列中三分之二的温度数据何时出现，并从中生成错误消息。然而，这个程序是用C编写的，我发现将C与php集成起来很困难。所以我想直接将编码转换为php，但问题是我不知道如何将表中的数据作为数组读取到php中，并根据设计条件进行检查，就像我在下面的C中编程一样：
while (fscanf(fpt, "%f", &t) == 1) // read until there are no more samples
{
total = 0; // clear our counter
samples[2] = samples[1]; // toss out the old 3rd sample
samples[1] = samples[0]; // and shift them to make room for the
samples[0] = t; // one we just read
for(i = 0; i<3; i++)
if(samples[i] > 180) // if any are over 180
total++; // increment our counter
if(total == 2) { // if 2 of the 3 are over 180, we got 2 out of 3
printf("2 out of 3 samples are greater than 180!'n");
printf("1: %f'n2: %f'n3:%f'n", samples[2],samples[1],samples[0]); //this can be change to echo"..."
break;
}
}
现在我遇到的问题是while循环，php如何像在C程序中那样将数据读取到数组中。谢谢你的每一次帮助。
PHP非常适合那些不关心性能的懒人。因此，对于大多数libc函数，核心中将有一个PHP包装函数-http://www.php.net/manual/en/function.fscanf.php.您的程序将几乎1比1转换为PHP，所需的只是输入源上的fopen（）（从php://stdin视情况而定）：
<?php
$samples = [0,0,0];
$t = "";
$fpt = fopen( "php://stdin", "r" ) or die ( "Failed open." );
while (fscanf($fpt, "%f", $t) == 1) // read until there are no more $samples
{
$total = 0; // clear our counter
$samples[2] = $samples[1]; // toss out the old 3rd sample
$samples[1] = $samples[0]; // and shift them to make room for the
$samples[0] = $t; // one we just read
for($i = 0; $i<3; $i++)
if($samples[$i] > 180) // if any are over 180
$total++; // increment our counter
if($total == 2) { // if 2 of the 3 are over 180, we got 2 out of 3
printf("2 out of 3 samples are greater than 180!'n");
printf("1: %f'n2: %f'n3:%f'n", $samples[2],$samples[1],$samples[0]); //this can be change to echo"..."
break;
}
}
?>
假设这个脚本被称为fscanf.php.Test，如下所示：
echo -e "12.0'n.34.5'n.190.45'n450.45'n345.34" | php fscanf.php