rand()

[Taxidriver]

Hello, I have a code that, given n segments in input, randomizes their order. The segments are stored in a linked list. Every element of the list is swapped with a random element calculated with the function rand(). the problem is that every time I run the program, the function rand() returns always the same numbers, in the same order! For example, 4 segments are always permuted following the sequence 1-3-2-0.
How can I have a better randomization?
thanks.

 

[sleipnir214]

You have to seed the random number generator. Take a look at your documentation for srand(). ______________________________________________________________________
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[Leibnitz]

You can seed the random-number generator "rand()" with the current time.

#include <time.h>
....
..
srand((unsigned )time( NULL ));
...