?? main.c
字號:
#include <REG52.H> /* special function register declarations */
/* for the intended 8051 derivative */
#include <stdio.h> /* prototype declarations for I/O functions */
#ifdef MONITOR51 /* Debugging with Monitor-51 needs */
char code reserve [3] _at_ 0x23; /* space for serial interrupt if */
#endif /* Stop Exection with Serial Intr. */
/* is enabled */
/*------------------------------------------------
The main C function. Program execution starts
here after stack initialization.
------------------------------------------------*/
void main (void) {
int sub_max(int *b,int i);
int n,a[10],*ptr=a;
int max;
/*------------------------------------------------
Setup the serial port for 1200 baud at 16MHz.
------------------------------------------------*/
#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
/*------------------------------------------------
Note that an embedded program never exits (because
there is no operating system to return to). It
must loop and execute forever.
------------------------------------------------*/
for( n = 0 ; n <= 9 ; n++)
scanf ( "%d" , &a[n]) ;
max = sub_max (ptr,10) ;
printf("max=%d\n",max) ;
while (1) {};
}
int sub_max(int *b,int i)/*形式參數為指針變量*/
{
int temp,j;
temp=b[0] ;/*數組元素指針的下標法表示*/
for( j = 1 ; j <= i - 1 ; j++ )
if(temp<b[j]) temp=b[j];
return temp;
}
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