ex1.c

零基础单片机C语言设计全套教程

#include<string.h> 							//头文件
#include<stdio.h>
#include <reg51.h>

void	main(void)			  				//主函数
{
char a = 2;								//变量声明并赋初值
int b  = 23456;
long c = 0x7FFFFFFF;

unsigned char x1 = 'A';
unsigned int x2  = 54321;
unsigned long x3 = 0x5A6F7E00;

char buf [] = "Good morning!";					//字符串
char *p = buf;

float f = 17.0;								//浮点型
float g = 25.63;

//初始化串口

printf ("char %bd int %d long %ld\n",a,b,c);		//格式化输出
printf ("Uchar %bu Uint %u Ulong %lu\n",x1,x2,x3);	//格式化输出
printf ("xchar %bx xint %x xlong %lx\n", x1,x2,x3);	//格式化输出
printf ("String %s is at address %p\n",buf,p);		//格式化输出
printf ("%f != %g\n", f, g);						//格式化输出
printf ("%*f != %*g\n", (int)8, f, (int)8, g);			//格式化输出
}