ch5-2.c

单片机接口技术(C51版)例程源代码

#include<stdio.h>
#include<reg51.h>

int a[3] [4]={ 
     {1,3,5,7}, 
     {9,11,13,15}, 
     {17,19,21,23} 
    }; 
    
            
		 
     char *month_name(int n) 
     { 
          static char *name[]={ 
               "Illegal month", 
               "January", 
               "February", 
               "March", 
               "April", 
               "May", 
               "June", 
               "July", 
               "August", 
               "September", 
               "October", 
               "November", 
               "December" 
          }; 
          return((n<1||n>12)?name[0]:name[n]); 
     } 
     main() 
     { 
          int i; 
	    	  #ifndef MONITOR51
          SCON  = 0x50;		        /* SCON: mode 1, 8-bit UART, enable rcvr      */
          TMOD |= 0x20;               /* TMOD: timer 1, mode 2, 8-bit reload        */
          TH1   = 221;                /* TH1:  reload value for 1200 baud @ 16MHz   */
          TR1   = 1;                  /* TR1:  timer 1 run                          */
          TI    = 1;                  /* TI:   set TI to send first char of UART    */
          #endif
          for(i=0; i<13; i++) 
               printf("%s\n", month_name(i)); 
         getchar();
     }