15.1 I heard that you have to #include <stdio.h> before calling printf. Why?
15.2 How can %f be used for both float and double arguments in printf? Aren't they different types?
15.3 I had a frustrating problem which turned out to be caused by the line
printf("%d", n);
where n was actually a long int.
I thought that ANSI function prototypes
were supposed to guard against argument type mismatches like this.
15.4 How can I write a function that takes a variable number of arguments?
15.5 How can I write a function that takes a format string and a variable number of arguments, like printf, and passes them to printf to do most of the work?
15.6 How can I write a function analogous to scanf, i.e. that accepts similar arguments, and calls scanf to do most of the work?
15.7 I have a pre-ANSI compiler, without <stdarg.h>. What can I do?
15.8 How can I discover how many arguments a function was actually called with?
15.9 My compiler isn't letting me declare a function
int f(...)
{
}
i.e. accepting a variable number of arguments,
but
with no fixed arguments at all.
15.10 I have a varargs function which accepts a float parameter. Why isn't
va_arg(argp, float)working?
15.11 I can't get va_arg to pull in an argument of type pointer-to-function.
15.12 How can I write a function which takes a variable number of arguments and passes them to some other function (which takes a variable number of arguments)?
15.13 How can I call a function with an argument list built up at run time?
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