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2¡¢int (*ptr) (),ÔòptrÊÇһάÊý×éµÄÃû×Ö¡££¨ F£¬ ptrΪһ¸öº¯ÊýÖ¸Õë £©
3¡¢Ö¸ÕëÔÚÈκÎÇé¿ö϶¼¿É½øÐÐ>,<,>=,<=,==ÔËËã¡££¨ F£¬Ö¸Õë±È½Ï´óСûÓÐÈκÎÒâÒ壬µ«ÊÇ¿ÉÒԱȽÏ==Ó룡= £©
4¡¢switch(c) Óï¾äÖÐc¿ÉÒÔÊÇint ,long,char ,float ,unsigned int ÀàÐÍ¡££¨ F£¬²»¿ÉÒÔΪfloat £©
5¡¢#define print(x) printf(£¢the no, £¢#x£¢,is £¢) (T)
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1¡¢ÔÚwindowsÏ£¬Ð´³öÔËÐнá¹û£¬Ã¿¿Õ2·Ö£¬¹²10·Ö¡£
char str[ ]= £¢Hello£¢;
char *p=str;
int n=10;
sizeof(str)=( 6 )
sizeof(p)=( 4 )
sizeof(n)=( 4 )
void func(char str[100])
{ }
sizeof(str)=( 4 )
2¡¢void setmemory(char **p, int num)
{ *p=(char *) malloc(num);}
void test(void)
{ char *str=NULL;
setmemory(&str,100);
strcpy(str,£¢hello£¢);
printf(str);
}
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3¡¢Éèint arr[]={6,7,8,9,10};
int *ptr=arr;
*(ptr++)+=123;
printf(£¢%d,%d£¢,*ptr,*(++ptr));
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££i nclude <stdio.h>
££i nclude <stdlib.h>
int mystrcmp(char *source, char *dest)
{
while(*source == *dest && *source != '\0' && *dest != '\0')
{
source++;
dest++;
&
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