Qustion about (random function) ?

[Warly girl]

Hi ...
I want to create Student class that including their id, which is an automatic number issued by the system ..

do I need to use random method ? or is there another simple way to make the id generated by the system -not input by the user - ?

i hope that you undarstand what do i mean .....

thanks !

[Meetee]

Hi ...
I want to create Student class that including their id, which is an automatic number issued by the system ..

do I need to use random method ? or is there another simple way to make the id generated by the system -not input by the user - ?

i hope that you undarstand what do i mean .....

thanks !

Why you want to use random number? It is better if you increment a number every time new student is created! What is your criteria regarding student id?

[Warly girl]

you mean it is enough to Increase the id in the constructer

id++;

[Meetee]

you mean it is enough to Increase the id in the constructer

id++;

Yeah, but that depends on your criteria. Why you want to take random numbers?

[Warly girl]

it just an idea because i think that increasing the number is not enough to make that !
thanks alot ..

[JosAH]

it just an idea because i think that increasing the number is not enough to make that !
thanks alot ..

Have a static member of your class, say 'id' and increment and assign it to your
student id every time you create one; so in the Student constructor you'd do:

[code=cpp]
myId= id++;
[/code]

Note that this approach is not thread safe and when you restart your program,
the static id variable will be reset again.

kind regards,

Jos

[Warly girl]

Have a static member of your class, say 'id' and increment and assign it to your
student id every time you create one; so in the Student constructor you'd do:

[code=cpp]
myId= id++;
[/code]

Note that this approach is not thread safe and when you restart your program,
the static id variable will be reset again.

kind regards,

Jos

thanks alot , i undarstand your explanation
so , i will declare "id" as static member
what about "myId"
can i declare it as const ?!!

[JosAH]

thanks alot , i undarstand your explanation
so , i will declare "id" as static member
what about "myId"
can i declare it as const ?!!

No; the variable 'myId' should be an ordinary (private?) member variable for all
the Student objects; it represents the unique id of a student.

kind regards,

Jos

[Warly girl]

it is clear
Thank you Jos ..