Zilog EZ80F916 - Manual (Page 362)

UM014423-0607 C Standard Library
ZiLOG Developer Studio II
eZ80Acclaim! ® User Manual
342
frexp
Breaks a floating-point number into a normalized fraction and an integral power of 2. It
stores the integer in the
int object pointed to by exp .
Synopsis
#include
double frexp(double value, int *exp);
Returns
The value x, such that x is a double with magnitude in the interval [1/2, 1] or zero, and
value equals x times 2 raised to the power *exp. If value is zero, both parts of the result are
zero.
Example
double y, x=16.4;
int n;
y=frexp(x,&n);
getchar
Waits for the next character to appear at the serial port and return its value.
Synopsis
#include
int getchar(void);
Returns
The next character from the input stream pointed to by stdin. If the stream is at end-of-file,
the end-of-file indicator for the stream is set, and
getchar returns EOF. If a read error
occurs, the error indicator for the stream is set, and getchar returns EOF.
Example
int i;
i=getchar();
NOTE: This function makes a call to hardware-specific functions to get data from the
UART. You must either link to ZSL to provide these hardware-specific functions
or provide your own equivalent functions. See “Run-Time Library” on page 154.