Keil C51中printf()函数的说明

在C51中，使用printf()函数进行格式化输出时，格式控制符与ANSI C有所不同。

在格式控制字符中，b表示byte

以十进制输出uint8_t : %bu

以十进制输出int8_t : %bd

#include <stdio.h>

void tst_printf (void) {
  char a = 1;
  int b  = 12365;
  long c = 0x7FFFFFFF;

  unsigned char x = 'A';
  unsigned int y  = 54321;
  unsigned long z = 0x4A6F6E00;

  float f = 10.0;
  float g = 22.95;

  char buf [] = "Test String";
  char *p = buf;

  printf ("char %bd int %d long %ld\n",a,b,c);
  printf ("Uchar %bu Uint %u Ulong %lu\n",x,y,z);
  printf ("xchar %bx xint %x xlong %lx\n",x,y,z);
  printf ("String %s is at address %p\n",buf,p);
  printf ("%f != %g\n", f, g);
  printf ("%*f != %*g\n", (int)8, f, (int)8, g);
}