Random numbers

[RoboGiu]

Hi,
i just created an object who store a vector of size 7 with
random numbers between 1 and 36. If i declare two objects i get
different vector, but running many times the program i always get the same vectors . For example, if i declare one object, even if i run any time the program, i always get the same numbers. I am using the function num= rand()%36+1,
wasn t it supposed to generate randoms numbers?
Thank you

[LB]

Did you call srand() once at the start of your program?

[RoboGiu]

No,
rand() is in the constructor of my object, so everytime i declare the object should call the rand() function

[LB]

There is a difference between "srand" and "rand" - it was not a typo.

[RoboGiu]

oh ok,
so how could i create a different random value everytime i run the program?

[LB]

Once, at the start of main, call srand(time(nullptr)).
http://www.cplusplus.com/reference/cstdlib/srand/
http://www.cplusplus.com/reference/ctime/time/

[Cronnoc]

you don't need nullptr you can just write srand(time(0));

[LB]

Using 0 or NULL in place of nullptr is deprecated.