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int arr[]={6,7,8,9,10};
int *ptr=arr;
*(ptr++)+=123;
printf("%d,%d",*ptr,*(++ptr));
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/*
* Exercise 2-5 Page 48
*
* Write the function any(s1,s2), which returns the first location
* in the string s1 where any character from the string s2 occurs,
* or -1 if s1 contains no characters from s2. (The standard library
* function strpbrk does the same job but returns a pointer t ......

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int a = 0; //È«¾ÖÇø 
void main() 
{
int b; //Õ» 
char s[] = “abc” ......

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pFn¡¡t1(void);
pFn¡¡t2(void);
int main()
{
¡¡¡¡pFn fn = t1 ;
¡¡¡¡while(1){
¡¡¡¡¡¡¡¡fn = fn();¡¡¡¡//Õâ¸ö£¬´ó¼Ò¿´Çå³þÁË
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}
pFn¡¡t1()
{
¡¡¡¡printf("t1\n");
¡¡¡¡return t2 ;
}
pFn¡¡t2()
{
¡¡¡¡printf("t2\n");
¡¡¡¡return t1 ;
}
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