cs6-3.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 char x=30;		
unsigned int y=55;				
unsigned int z;					
	z=x*y;					
	while(1)					
	{						
	P0= SEG7[z/1000];			
	P2=0xf7;					
	delay(1);					
	P0= SEG7[ (z%1000)/100];
	P2=0xfb;					
	delay(1);					
	P0= SEG7[ (z%100)/10];
	P2=0xfd;					
	delay(1);					
	P0= SEG7[z%10];		
	P2=0xfe;					
	delay(1);				
	}						
}