Standard C++ Library Reference ISO/IEC (VERSION3)

size_t
typedef ui-type size_t;
The type is the unsigned integer type ui-type of an object that you declare to store the result
of the sizeof operator.
sprintf
int sprintf(char *s, const char *format, ...);
The function generates formatted text, under the control of the format format and any
additional arguments, and stores each generated character in successive locations of the array
object whose first element has the address s. The function concludes by storing a null character
in the next location of the array. It returns the number of characters generated -- not including
the null character.
sscanf
int sscanf(const char *s, const char *format, ...);
The function scans formatted text, under the control of the format format and any additional
arguments. It accesses each scanned character from successive locations of the array object
whose first element has the address s. It returns the number of items matched and assigned, or it
returns EOF if the function does not store values before it accesses a null character from the
array.
stderr
#define stderr <pointer to FILE rvalue>
The macro yields a pointer to the object that controls the standard error output stream.
stdin
#define stdin <pointer to FILE rvalue>
The macro yields a pointer to the object that controls the standard input stream.