[elektro] C kérdés

[Ferenc Toth]

na végül igy csináltam meg

while(!(CAN1Read(&msg_id, Rxdata, &data_len, &rx_flags))){
      }
      if 
((Rxdata[0]==0x10)&(Rxdata[1]==0x70)&(Rxdata[2]==0x7B)&(Rxdata[3]==0x00)&(Rxdata[4]==0x17)&(Rxdata[5]==0x00)&(Rxdata[6]==0xB9)&(Rxdata[7]==0x00)) 
LED1=0;

nem tul szép ,de muködik.
Megkerestem ezt a memcmp-t és tényleg igazad van .Ez lett volna az igazi...


memcmp

Description: Compare the contents of two buffers.

Include: <string.h>

Prototype: int memcmp(const void *s1, const void *s2, size_t n);

Arguments: s1 first buffer

s2 second buffer

n number of characters to compare

Return Value: Returns a positive number if s1 is greater than s2, zero if s1 
is equal to

s2, or a negative number if s1 is less than s2.

Remarks: This function compares the first n characters in s1 to the first n 
characters

in s2 and returns a value indicating whether the buffers are less

than, equal to or greater than each other.

Example: #include <string.h> /* memcmp */

#include <stdio.h> /* for printf */

int main(void)

{

char buf1[50] = "Where is the time?";

char buf2[50] = "Where did they go?";

char buf3[50] = "Why?";

int res;

printf("buf1 : %s\n", buf1);

printf("buf2 : %s\n", buf2);

printf("buf3 : %s\n\n", buf3);

res = memcmp(buf1, buf2, 6);

if (res < 0)

printf("buf1 comes before buf2\n");

else if (res == 0)

printf("6 characters of buf1 and buf2 "

"are equal\n");

else

printf("buf2 comes before buf1\n");



----- Original Message ----- 
From: "Lajos Rancz" <lajos.rancz at gmail.com>
To: <elektro at tesla.hu>
Sent: Sunday, September 05, 2010 12:58 PM
Subject: Re: [elektro] C kérdés


memcmp? Az tuti ki van optimalizalva.

udv,
Lajos

2010. szeptember 4. 9:40 Ferenc Toth írta, <toferi2 at freemail.hu>:

> Sziasztok.
>
> A kérdésem az lenne,hogy a C ben egy tömb elemeit egyszerre meg lehet
> vizsgálni?
> hogy mire gondolok
>
> char DataI[8];
> main{
>
> //ha a DataI =12345678 akkor ....
>
> }
>
> -----------------------------------------
>          elektro[-flame|-etc]
-----------------------------------------
          elektro[-flame|-etc]


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