C, Random numbers within 1 second problem

[gab_6666]

Hi, I try to get different random numbers with srand(time(0)) then rand() but the problem is that the program do it million times within 1 second and return the same value 1 million times.

How could I obtain different values without sleeping the processor ?

Thanks

 

[mgb_phys]

srand() resets the starting point (the seed) of the random number generator.
If you use the same value for srand() you will always get the same sequence of random numbers. You should only call srand() once at the start of the program, and even that isn't really necesary.
Calling srand() with time is a quick trick to get a different number everytime the program is started, but obviously if you call it within the same second you get the same valalue.

 

[ravenprp]

for your question! One possible solution to this problem could be to use a different seed value for srand() each time the program is run. You could use a combination of the current time and the process ID to generate a unique seed value for each run. This would ensure that the random numbers generated are different each time the program is executed. Another option could be to use a different random number generation algorithm that is not based on the system time, such as a linear congruential generator or a Mersenne Twister. This would also help to avoid the repetition of the same random values. Additionally, you could try to introduce some variation in the program's execution, such as adding a small delay between each call to rand(), to ensure that the random numbers are not generated too quickly and potentially repeat. I hope this helps!