Zilog Z8F0130 - Manual (Page 477)

UM013037-1212 printf
Zilog Developer Studio II – Z8 Encore!
User Manual
453
Synopsis
#include

int printf(char *format, ...);
Returns
The number of characters transmitted or a negative value if an output error occurred.
Example
int i=10;

printf("This is %d",i);
By default, Zilog compilers parse printf and sprintf format strings and generate calls
to lower level support routines instead of generating calls to printf and sprintf . For
more information, see the description of the -genprintf option in the Generate Printfs
Inline section on page 84.
The UART must be initialized using the Zilog init_uart() function. See the init_uart
section on page 232.
printf Flag Characters
- The result of the conversion is left-justified within the field.
+ The result of a signed conversion always begins with a plus or a minus sign.
space If the first character of a signed conversion is not a sign, a space is added before
the result. If the space and + flags both appear, the space flag is ignored
# The result is to be converted to an ''alternate form''. For c, d, i, s, and u
conversions, the flag has no effect. For o conversion, it increases the precision to
force the first digit of the result to be a zero. For x (or X) conversion, a nonzero
result always contains a decimal point, even if no digits follow the point (normally,
a decimal point appears in the result of these conversions only if a digit follows it).
For g and G conversions, trailing zeros are not removed from the result, as they
normally are.
Note: