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void GetMemory(char *p)
{
p = (char *)malloc(100);
}
void Test(void)
{
char *str = NULL;
GetMemory(str);
strcpy(str£¬ "hello world");
printf(str);
}
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ÒòΪGetMemory ²¢²»ÄÜ´«µÝ¶¯Ì¬Äڴ棬
Test º¯ÊýÖÐµÄ str Ò»Ö±¶¼ÊÇ NULL¡£
strcpy(str£¬ "hello world");½«Ê¹³ÌÐò±À
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char *GetMemory(void)
{
char p[] = "hello world";
return p;
}
void Test(void)
{
char *str = NULL;
str = GetMemory();
printf(str);
}
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ÒòΪGetMemory ·µ»ØµÄÊÇÖ¸Ïò“Õ»ÄÚ´æ”
µÄÖ¸Õ룬¸ÃÖ¸ÕëµÄµØÖ·²»ÊÇ NULL£¬µ«ÆäÔ­
ÏÖµÄÄÚÈÝÒѾ­±»Çå³ý£¬ÐÂÄÚÈݲ»¿ÉÖª¡£
void GetMemory2(char **p£¬ int num)
{
*p = (char *)malloc(num);
}
void Test(void)
{
char *str = NULL;
GetMemory(&str£¬ 100);
strcpy(str£¬ "hello");
printf(str);
}
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void Test(void)
{
char *str = (char *) malloc(100);
strcpy(str£¬ “hello”);
free(str);
if(str £¡= NULL)
{
strcpy(str£¬ “world”);
printf(str);
}
}
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ÒòΪfree(str);Ö®ºó£¬str ³ÉΪҰָÕ룬
if(str £¡= NULL)Óï¾ä²»Æð×÷Óá£
**********************************************************************************************
void GetMemory2(char **p£¬ int num)
{
*p = (


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extern "C"Ïê½â

       C++ÓïÑԵĴ´½¨³õÖÔÊÇ“a better
C”£¬µ«ÊÇÕâ²¢²»Òâζ×ÅC++ÖÐÀàËÆCÓïÑÔµÄÈ«¾Ö±äÁ¿ºÍº¯ÊýËù²ÉÓõıàÒëºÍÁ¬½Ó·½Ê½ÓëCÓïÑÔÍêÈ«Ïàͬ¡£×÷ΪһÖÖÓûÓëC¼æÈݵÄÓïÑÔ£¬C++±£ÁôÁËÒ»²¿·Ö¹ý³Ì
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Hacks in C Programming Language

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enum {false,true};
int main()
{
int i=1;
do
{
printf("%d\n",i);
i++;
if(i < 15)
continue;
}while(false);
return 0;
}

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C struct ÖÐ×Ö½Ú¶ÔÆëÎÊÌâ

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struct MyStruct
{
    double m4;
    char m1;
    int  m3£»
};
s ......

smartgwt (C)

   SmartGWTÊÇÒ»¸öÀûÓÃGWT·â×°SmartClientµÄ¿ªÔ´ÏîÄ¿¡£ÀàËÆÓÚGWT-Ext¡£SmartClientÊÇÒ»¸öÆóÒµ¼¶µÄajax¿ò¼Ü£¬°üÀ¨·Ç³£³öÉ«µÄUI¿â¡¢¹¤¾ß¿âºÍ¿Í»§¶Ë·þÎñ¶ËÊý¾Ý°ó¶¨µÈ¹¦ÄÜ¡££¨ÒýÓã©
  UI¿â£ººÜ¶à¿ò¼ÜµÄUI¿âºÜ³öÉ«£¬¿¼ÂǵĺÜÍêÉÆ£¬ä¯ÀÀÆ÷¼æÈÝÐÔÒ²ºÜºÃ£¬µ«ÍùÍùÖ»ÊÇǰ̨µÄ£¬µ±ÄãÏëÉîÈë×öµãÓ¦ÓÃʱ£¬¾Í»á·¢Ïֺͺǫ́ ......

ADC0809 C³ÌÐò

 #include<reg52.h>
#include<intrins.h>
#define uint  unsigned int
#define uchar unsigned char
uint date;
uchar mm=0,n=0;
uint k1,k2,k3,k4,k5,k6;
uchar code b[]={
    0x3f,0x06,0x5b,0x4f,0x66,   //0,1,2,3,4,
    0x6d,0x7d,0x07,0x7 ......
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