SEARCH KEYWORD -- srand
A trap about PHP random number
The method to get random number in PHP is very simple, we only need to use rand() function. int rand ( int $min , int $max ) One function call can return the random number in a specified range. But in fact, the random number in computer is actually pseudorandomness, generally to increase the randomness, we may set a random seed before calling rand(). void srand ([ int $seed ] ) According to other language features, we should pass a time value as a parameter to the srand() function, generally...
sorting in C++: 3 times faster than C.
If you don't know C++ well, you might be surprised how fast C++ can be sometimes. This is especially true when code involved is small, because then inlining - which is what C++ is very good at - and templating, which makes excessive inlining possible in the first place - has the most effect. The following code compares C and C++ sorting: #include <iostream>#include <algorithm>#include <vector>#include "stop_watch.inl" // see https://...
C++,Sorting,C,faster,efficiency 2012-03-17 12:59:45
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