Re: Pro*C examples: printf question

A format specification for the printf function has the following form

  %[flags] [width] [.precision] [{h | l | L}]type.

[ ] indicates an option.

The format specification %.*s has no flag or width arguments.

The '.*' is the precision argument and for strings represents the maximum number of characters to be output for the field.

When the precision field is a *, an int argument that precedes the string argument in the argument list supplies the precision value.

For example.

   printf("String is %.3s","Hello world");

    >String is Hel

   printf("String is %.*s",8,"Hello world");

    >String is Hello Wo

-- 
Cornishmen do it dreckly

Chuck Hamilton wrote:


> 

> Some of Oracle's Pro*C demo programs, such as sqlvcp.pc, contain a


> printf flag that I've never seen before. In the following statment:

> 

> printf("%.*s\n", msg_len, err_msg);

> 

> what is the '.' flag for? It's not documented in any of my C manuals.

> --

> Chuck Hamilton

> chuckh_at_dvol.com

> 

> If at first you don't succeed, skydiving isn't for you.