java中loop使十进制转八进制_php实现将任意进制数转换成10进制的方法

素颜马尾好姑娘i 2022-11-08 14:14 96阅读 0赞

本文实例讲述了php实现将任意进制数转换成10进制的方法。分享给大家供大家参考。具体如下：

php将任意进制的数转换成10进制，例如8进制转换成10进制，16进制转换成10进制

\# Show the steps involved in converting a number

\# from any base (like octal or hex) to base 10

\# See below for examples, instructions and copyright

function show\_convert\_to\_base\_10 ($number, $base)

// If the number contains a decimal component

if (strstr ($number, '.'))

// Get the integer and decimal components

list ($integer, $decimal) = explode ('.', $number);

else

// The number is an integer

$integer = $number;

print "**Convert the base $base number $number to a**

base 10 number:

> ";
> 
> print "Convert the integer component ($integer) of the
> 
> number:
> 
> > ";
> > 
> > // Compute the value of the integer component
> > 
> > // Loop through the integer digit by digit
> > 
> > // Reverse the number for easier handling
> > 
> > $integer = strrev ($integer);
> > 
> > $length = strlen ($integer);
> > 
> > for ($pos = 0; $pos < $length; ++$pos)
> > 
> > \{
> > 
> > /\*
> > 
> > PHP lets you treat strings and numbers like arrays
> > 
> > Specify an offset and get the character at that
> > 
> > position
> > 
> > \*/
> > 
> > $digit = $integer\[$pos\];
> > 
> > // Handle character values for digits
> > 
> > // (for bases greater than 10)
> > 
> > if (eregi ('\[a-z\]', $digit))
> > 
> > \{
> > 
> > $digit\_value =
> > 
> > (ord (strtolower ($digit))
> > 
> > \- ord ('a')) + 10;
> > 
> > $digit = "$digit ($digit\_value)";
> > 
> > \}
> > 
> > else
> > 
> > \{
> > 
> > $digit\_value = $digit;
> > 
> > \}
> > 
> > // Multiply the current digit by the radix
> > 
> > // raised to the power of the current position
> > 
> > $result = $digit\_value \* pow ($base, $pos);
> > 
> > print "Multiply the value of the digit at position
> > 
> > $pos by the value of the radix ($base) raised
> > 
> > to the power of the position ($pos):  
> > ";
> > 
> > print "$digit \* $base$pos = $result
> > 
> >   
> > ";
> > 
> > $sums\[\] = $result;
> > 
> > \}
> > 
> > print '
> 
> ';
> 
> if (isset ($decimal))
> 
> \{
> 
> print "Convert the decimal component (0.$decimal)
> 
> of the number:
> 
> > ";
> > 
> > // Pad the number with a leading 0 so that we can
> > 
> > // start at position 1
> > 
> > $decimal = '0'.$decimal;
> > 
> > $length = strlen ($decimal);
> > 
> > for ($pos = 1; $pos < $length; ++$pos) \{
> > 
> > $digit = $decimal\[$pos\];
> > 
> > // Handle character values for digits
> > 
> > // (for bases greater than 10)
> > 
> > if (eregi ('\[a-z\]', $digit))
> > 
> > \{
> > 
> > $digit\_value =
> > 
> > (ord (strtolower ($digit))
> > 
> > \- ord ('a')) + 10;
> > 
> > $digit = "$digit ($digit\_value)";
> > 
> > \}
> > 
> > else
> > 
> > \{
> > 
> > $digit\_value = $digit;
> > 
> > \}
> > 
> > // Multiply the current digit by the radix
> > 
> > // raised to the power of the current position
> > 
> > $result = $digit\_value \* pow (1/$base, $pos);
> > 
> > print "Multiply the value of the digit at
> > 
> > position $pos by the value of the 1/radix
> > 
> > ($base) raised to the power of the position
> > 
> > ($pos):  
> > ";
> > 
> > print "$digit \* 1/$base$pos =
> > 
> > $result  
> > ";
> > 
> > $sums\[\] = $result;
> > 
> > \}
> > 
> > print '
> 
> ';
> 
> \}
> 
> $sums = implode (' + ', $sums);
> 
> eval ("\\$base\_10\_value = $sums;");
> 
> print "

The value of the base $base number

$number in base 10 is $base\_10\_value.  
";

print "This number is derived from the sum of the values

of the previous operations ($sums).  
";

希望本文所述对大家的php程序设计有所帮助。