Zilog Z8F0130 - Manual (Page 498)

Appendix B. C Standard Library UM013037-1212
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Example
char c='A';

int i;

i=tolower(c);
toupper
Converts a lowercase letter to the corresponding uppercase letter.
Synopsis
#include

int toupper(int c);
Returns
If the argument is a lowercase letter, the toupper function returns the corresponding
uppercase letter, if any; otherwise, the argument is returned unchanged.
Example
char c='a';

int i;

i=toupper(c);
va_arg
Expands to an expression that has the type and value of the next argument in the call. The
parameter
ap is the same as the va_list ap initialized by va_start . Each invocation of
va_arg modifies ap so that successive arguments are returned in turn. The parameter type
is a type name such that the type of a pointer to an object that has the specified type can be
obtained simply by fixing a * to type. If type disagrees with the type of the actual next
argument (as promoted, according to the default argument conversions, into
int , unsigned
int, or double), the behavior is undefined.
Synopsis
#include

type va_arg(va_list ap, type);
Returns
The first invocation of the va_arg macro after that of the va_start macro returns the
value of the argument after that specified by parmN. Successive invocations return the val-
ues of the remaining arguments in succession.