KEIL C51 printf formatted output special usage

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KEIL has expanded the b, h, and l to set the input byte width:
(1) b is 8 bits
(2) h is 16 bits (default)
(3) l is 32 bits

In Keil C51, when using printf to output a single-byte variable, you need to use %bd, such as
unsigned char counter;
printf("Current count: %bd\n", counter); // Output 8-bit "decimal signed integer"
printf("Current count: %bx\n", counter); // Output 8-bit "unsigned hexadecimal integer"

In standard C language, %d is used:
printf("Current count: %d\n", counter);

1. Format specifiers The
format specifiers provided by Turbo C2.0 are as follows:
━━━━━━━━━━━━━━━━━━━━━━━━━━━Symbol
Function────────────────────────────
%
d Decimal signed integer
%u Decimal unsigned integer
%f Floating-point number
%s Character string
%c Single character
%p Pointer value
%e Exponential floating-point number
%x, %X Unsigned hexadecimal integer
%0 Unsigned octal integer
%g Automatically select the appropriate representation━━━━━━━━━━━━━━━━━━━━━━━━━━━━Description
:
(
1). You can insert a number between "%" and a letter to indicate the maximum field width.
For example: %3d means outputting a 3-digit integer. If it is less than 3 digits, it will be right-aligned.
%9.2f means outputting a floating point number with a field width of 9, where the decimal place is 2 and the integer place is 6.
The decimal point occupies one place, and if it is less than 9 places, it
will be right-aligned. %8s means outputting a string of 8 characters, and if it is less than 8 characters, it will be right-aligned.
If the length of the string or the number of integer digits exceeds the specified field width, it will be output according to its actual length.
However, for floating point numbers, if the number of digits in the integer part exceeds the specified integer digit width, it will be output according to the actual integer digits;
if the number of digits in the decimal part exceeds the specified decimal digit width, it will be output according to the specified width and rounded.
In addition, if you want to add some zeros before the output value, you should add a zero before the field width item
. For example: d means that when outputting a value less than 4 digits, it will add zeros in front to make the total width 4 digits.
If a floating point number is used to represent the output format of a character or integer quantity, the number after the decimal point represents the maximum width, and the
number before the decimal point represents the minimum width.
For example: %6.9s means displaying a string with a length not less than 6 and not more than 9. If it is greater than 9,
the content after the 9th character will be deleted.
(2). You can add a lowercase letter l between "%" and a letter to indicate that the output is a long number.
For example: %ld indicates the output of a long integer
%lf indicates the output of a double floating point number
(3). You can control the output to be left-aligned or right-aligned, that is, adding a "-" sign between "%" and a letter
indicates that the output is left-aligned, otherwise it is right-aligned.
For example: %-7d means outputting a 7-bit integer left-aligned %
-10s means outputting 10 characters left-aligned
2. Some special characters━━━━━━━━━━━━━━━━━━━━━━━━━Character
Function──────────────────────────────
\ n Line feed \f Clear screen and feed page \r Carriage return \t Tab character \xhh means an ASCII code represented in hexadecimal, where hh is 1 to 2 hexadecimal digits━━━━━━━━━━━━━━━━━━━━━━━━━ *******************************************/

#include
#include

void delay(unsigned int time)
{
unsigned int i,j;
for(i=0;i<1000;i++)
for(j=0;j}

void main(void)
{
SCON = 0×50; //Serial port mode 1, allow receiving
TMOD = 0×20; //Timer 1 timing mode 2
TCON = 0×40; //Set timer 1 to start counting
TH1 = 0xFD; //11.0592MHz 9600 baud rate
TI = 1;
TR1 = 1; //Start timer

while(1)
{
printf("Current count: %lx\n",0×12345678); //32-bit hexadecimal number
delay(100);
}
}