Syntax of a function declaration

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I have found :

void CBase::WriteToLog(const char *pText, ...)

as a function prototype. This function is trying to write to a text file while logging into the application. The question is what

(,...)

which is found in the function prototype means?

What I have tried:

I have tried to remove it from the prototype and make no change

Posted 16-Dec-17 5:51am

Ahmed AE

Updated 16-Dec-17 6:40am

v2

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Richard MacCutchan · Accepted Answer · 2017-12-16T06:40:00

Solution 1

It is an ellipsis, that indicates that the function takes a variable number of arguments after the first one. The printf function is a case in point. See va_arg, va_copy, va_end, va_start[^] for a sample implementation.

Posted 16-Dec-17 6:40am

Richard MacCutchan

Comments

[no name] 16-Dec-17 12:42pm

Wow, was not Aware oh that, 5.

Richard MacCutchan 16-Dec-17 12:47pm

It's easy enough to find if you read the C reference manual.

Ahmed AE 16-Dec-17 14:21pm

thanks