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Re: 如何比较长的信息
#2
版主
版主


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參考一下 C18 所提供的字串比較函數 strcmpram2ram( )
Library User'd Guide 在 C:\MCC18\doc\hlpC18Lib.html 裡,搜尋一下"strcmp" 就可以找到。

strcmp 
strcmppgm 
strcmppgm2ram 
strcmpram2pgm   

Function:  Compare two strings.  
Include:  
string.h
 
Prototype
:  signed char strcmp(
      const 
char str1,
      const 
char str2 );
signed char strcmppgm(
      const 
rom char str1,
      const 
rom char str2 );
signed char strcmppgm2ram(
      const 
char str1,
      const 
rom char str2 );
signed char strcmpram2pgm(
      const 
rom char str1,
      const 
char str2 );
 
Arguments:  str1 Pointer to first string
            
str2 Pointer to second string.  

Remarks:  This function compares the string in str1 to the string in str2 and returns a value indicating if str1 is less thanequal to or greater than str2.  
Return 
Value:  Returns a value that is
<
if str1 is less than str2 
==if str1 is the same as str2 
>if str1 is greater than str2  

File Name
:  strcmp.asm
scmpp2p
.asm
scmpp2r
.asm
scmpr2p
.asm

發表於: 2010/1/20 10:58
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如何比较长的信息
#1
資深會員
資深會員


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请教如何构造一个比较长的字符是否相同,比如字符
MYNAME是一固定字符,接收到的信息该如何比较,当然我现在是
if(recvdata[0]==0X4D)
{
if(recvdata[1]==0x59)
{
if.......
感觉这样好像太笨啦

發表於: 2010/1/19 22:54
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