Member Avatar for vedro-compota

Hi there!)
Guys please tell me - where can I see the realization (or custom realization) of fprintf in C++ ?
I'm especially interesed in working with no fixed number of passed parameters.
I need to made somethings like fpintf() by myself but i don't know how....

big thanks in advance)

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Member Avatar for WaltP

Look up
va_start,
va_list,
va_arg,
va_end

Member Avatar for vedro-compota

guys tell me - how does fprintf() get know - when the list of parameters is ended ?
we not pass Null or 0 parameter as last one. - but everything works.

Member Avatar for deceptikon

how does fprintf() get know - when the list of parameters is ended ?

It relies on the format string for this information. That's why nothing bad happens if you provide more arguments than the format string uses, but it's undefined behavior if you provide fewer.

Member Avatar for vedro-compota

It relies on the format string for this information. That's why nothing bad happens if you provide more arguments than the format string uses, but it's undefined behavior if you provide fewer

thanks deceptikon ! i've understood you))

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