Beiträge von The User

#include <iostream>
#include <iomanip>
#include <cstdint>
using namespace std;


int main()
{
        unsigned int zahlen[7] = { 1, 2, 11, 12, 21, 22, 31 };
        cout << hex << setfill('0');
        for(size_t i = 0; i != 7; ++i) // <-- So sieht eine For-Schleife für Arrays richtig aus!
        {
                cout << &(zahlen[i]);
                unsigned int x = zahlen[i];
                for(short j = 0; j != __WORDSIZE / 8; ++j)
                {
                        cout << " " << setw(2) << (x % 256);
                        x >>= 8;
                }
                cout << endl;
        }
}

define('max', 10000);                                           
function getKey()                                               
{                                                               
        return chr(97 + rand() % 5);                            
}                                                               
$t1 = microtime(true);                                          
$array = array('a' => 'Aloa!', 'b' => 'Bye Bye', 'c' => 'Ciao', 'd' => 'Default');
$default = 'Guten Tag!';                                                          
for($i = 0; $i != max; ++$i)                                                      
{                                                                                 
        $key = getKey();                                                          
        $value = isset($array[$key]) ? $array[$key] : $default;                   
}                                                                                 
$t2 = microtime(true);                                                            
echo 'Hash-Table: ' . ($t2-$t1) . 's                                              
';                                                                                
$t1 = microtime(true);                                                            
for($i = 0; $i != max; ++$i)                                                      
{                                                                                 
        $key = getKey();                                                          
        switch($key)                                                              
        {                                                                         
        case 'a':                                                                 
                $value = 'Aloa!';                                                 
                break;                                                            
        case 'b':                                                                 
                $value = 'Bye Bye';                                               
                break;                                                            
        case 'c':                                                                 
                $value = 'Ciao';                                                  
                break;                                                            
        case 'd':                                                                 
                $value = 'Default';                                               
                break;                                                            
        default:                                                                  
                $value = 'Guten Tag!';
        }
}
$t2 = microtime(true);
echo 'Switch: ' . ($t2-$t1) . 's
';
$t1 = microtime(true);
for($i = 0; $i != max; ++$i)
{
        $key = getKey();
        if($key === 'a')
                $value = 'Aloa!';
        elseif($key === 'b')
                $value = 'Bye Bye';
        elseif($key === 'c')
                $value = 'Ciao';
        elseif($key === 'd')
                $value = 'Default';
        else
                $value = 'Guten Tag!';
}
$t2 = microtime(true);
echo 'If-Elseif-Else: ' . ($t2 - $t1) . 's
';