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Ê×ÏÈ,ÔÚÓ¦ÓÃÄÚ,ÓÃmallocÉêÇëµ½µÄÒ»¿éµØÖ·Ó¦¸ÃÊÇÁ¬ÐøµÄ(²Â²â,Âß¼­ÉÏÁ¬Ðø,ʵ¼ÊÉÏÎïÀíÈçºÎ·Ö²¼²»Óè¹Ø×¢).
Æä´Î,Êý¾Ý´æÔÚÔÚÄÚ´æÖж¼ÊÇÒÔ2½øÖÆÐÎʽ´æ·Å.²»´æÔÚÊý¾ÝÀàÐÍ,Òò´Ë,¶ÔÄÚ´æÊý¾ÝµÄ²Ù×÷,Ö»Òª×ñÑ­½ø³öÀàÐÍÒ»Ö¼´¿É.
´Ë´¦µÄ½ø,ÊÇÖ¸½«Êý¾Ý´æ·Åµ½ÄÚ´æÖÐ,Èç´æ½øÒ»¸öintÐ͵ÄÊý¾Ý,¶ÁÈ¡µÄʱºò°´int¶ÁÈ¡¼´¿É,´æ´¢Ò»¸öchar*µÄÊý¾Ý,°´char*¶ÁÈ¡¼´¿É.
#define mAlloc(p,size)\
{\
errno=0;\
if((p=(char*)malloc(sizeof(char)*size)))==null){\
printf("malloc error[%d]\n",errno);\
exit(-1);\
}\
memset(p,0,sizeof(char)*size);\
}\
#define setInt(p,v) (*(int*)(p)=v)
#define setStr(p,v,size) strcpy(p,v)
int main()
{
char *p;

mAlloc(p,10);
setInt(p,100);
printf("int:%d\n",*(int*)p);

setStr(p+sizeof(int),"abc");
printf("str:%s\n",p+sizeof(int));

return 1;



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C³ÌÐòÔ±µÄÇéÊé

#include <stdio.h>
#include <string.h>
int
main(void)
{
char str[] =
"3BVPSq4xF.K?=u#,"
"G'K<MrDnRr7gH%#,"
"XKf<f%G`w^=?C<#,"
"HgU_AnNR?*PDQU#,"
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