section 7.2: Formatted Output -- Printf

pages 153-155

To summarize the important points of this section:

printf's output goes to the standard output, just like putchar.
Everything in printf's format string is either a plain character to be printed as-is, or a %-specifier which generally causes one argument to be consumed, formatted, and printed. (Occasionally, a single %-specifier consumes two or three arguments if the width or precision is *, or zero arguments if the specifier is %%.)
There's a fairly long list of conversion specifiers; see the table on page 154.
Always be careful that the conversions you request (in the format string) match the arguments you supply.
You can ``print'' to a string (instead of the standard output) with sprintf. (This is the usual way of converting numbers to strings in C; the itoa function we were playing with in section 3.6 on page 64 is nonstandard, and unnecessary.)

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