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void GetMemory(char **p, int num)
{
*p = (char *)malloc(sizeof(char) * num);
}
char* GetMemory2(int num)
{
char* p = (char *)malloc(sizeof(char) * num);
return p;
}
------------------------------------------
´íÎóµÄ´úÂë:
void GetMemory3(char *p, int num)
{
p = (char *)malloc(sizeof(char) * num);
}///////////////´íÎóÔÚÄÄÀï,ÎҾͲ»Ëµ,×Ô¼ºÈ¥²é.
2.strcpy()µÄ´úÂë:
char* strcpy(char* strDest,const char* strSrc)
{
if(strDest==NULL || strSrc==NULL) return NULL;
char* pStr=strDest;
while((*strDest++=*strSrc++)!='\0)
NULL;
return pStr;
}
3.memcpy()µÄ´úÂë:
void* memcpy(char* strDest,const char* strSrc,size_t size)
{
if(strDest==NULL||strSrc==NULL) return NULL;
if(size <=0) return NULL;
char* pStr=strDest;
while(size-->0)
*strDest++=*strSrc++;
return pStr;
}
4.¹ØÓÚsizeof²Ù×÷·û:
char 1
short 2
short int 2
signed short 2
unsigned short 2
int 4
long
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If MSComm1.PortOpen = True Then MSComm1.PortOpen = False
MSComm1.CommPort = i1
MSComm1.PortOpen = True
MSComm1.InputMode = comInputModeBinary
MSComm1.InBufferCount = 0
& ......
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char
Byte
8λÎÞ·ûºÅÕûÊý
BYTE,unsigned short
SmallInt
16λÓзûºÅÕûÊý
short
Word
16λÎÞ·ûºÅÕûÊý
unsigned short
Integer,LongInt
32λÓзûºÅÕûÊý
int,long
Cardinal,LongWord/DWORD
32λÎÞ·ûºÅÕûÊý
unsigned long
Int6 ......
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2¡¢#define,const
3¡¢Îļþ¿½±´µÄ´úÂë,¶¯Ì¬Éú³ÉÄÚ´æ,¸´ºÏ±í´ïʽ,strcpy,memcpy,sizeof
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