cs6-4.c

《手把手教你学单片机的C程序设计》及实验程序

#include <REG51.H>				
unsigned char code SEG7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
//********************************
void delay(unsigned int k)	
{				
unsigned int i,j;		
for(i=0;i<k;i++){	
for(j=0;j<121;j++)		
{;}}				
}				
//********************************
void main(void)			
{	unsigned int x=20;	
	unsigned int y=11;	
	unsigned char z;	
	z=( unsigned char)(x*y);
	while(1)		
	{			
	P0= SEG7[z/100];	
	P2=0xfb;			
	delay(1);			
	P0= SEG7[(z%100)/10];		
	P2=0xfd;				
	delay(1);				
	P0= SEG7[z%10];		
	P2=0xfe;					
	delay(1);				
	}					
}