Calling C++ prog with variable number of arguments

[tewari68]

Hi,
I have a C++ prog. which is to be called by either 4 or 5 arguments, i.e. it is always called with 4 arguments however sometimes it might be called with an optional 5th argument.
How do we cope with this situation.
The prog. breaks if only four arguments are passed, 5th being optional and not being passed.

Appreciate any help
Thanks

 

[chipperMDW]

If [tt]main[/tt] is declared as

int main( int argc, char *argv[] )

then [tt]argc[/tt] is the number of arguments passed, plus one for the command name.

 

[sidhujay]

hi

you can use <stdarg.h> header file for variable argument passing to c/c++ program,and macros you will have to use for this are

1.va_start
2.va_arg
3.va_list

best of luck

 

[chipperMDW]

That's incorrect.

You might use the <stdarg.h> macros for retrieving variable arguments passed to a function, but not to a program. Not in any existing C or C++ implementation, anyway.