printf()
含义：Print text formatted to the C library printf() routine specification
Format
printf(format,[arg1,......,argn])
Parameter
| Parameter | Definition |
| format | text, variable names, and control characters that specify the content and
format of output to the computer or task output window:
Valid Values
%d signed decimal (identical to %i)
%i signed decimal (identical to %d)
%u unsigned decimal
%o unsigned octal
%x unsigned hexadecimal using abcedf
%X unsigned decimal using ABCDEF
%c unsigned character
%s character string
%e double precision form drddde±ddd where each d is a digit and r is the radix character
%E do |
