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#include<stdio.h>
typedef int (*CallBackFun)(char *p);
/*¸ÃÓï¾ä¶¨ÒåÁËÀàÐÍCallBackFunÊǓһ¸öÖ¸Ïòº¯ÊýµÄÖ¸Õ룬¸Ãº¯Êý¾ßÓÐ1¸öchar *ÀàÐ͵IJÎÊý£¬·µ»ØÖµµÄÀàÐÍΪint.”*/
int Afun(char *p) {    // ·½·¨ Afun£¬¸ñʽ·ûºÏ CallBackFun µÄ¸ñʽ£¬Òò´Ë¿ÉÒÔ¿´×÷ÊÇÒ»¸ö CallBackFun
    printf("Afun »Øµ÷´òÓ¡³ö×Ö·û%s!\n", p);
    return 0;
}
int Cfun(char *p) {    // ·½·¨ Bfun£¬¸ñʽ·ûºÏ CallBackFun µÄ¸ñʽ£¬Òò´Ë¿ÉÒÔ¿´×÷ÊÇÒ»¸ö CallBackFun
    printf("Cfun »Øµ÷´òÓ¡:%s, Nice to meet you!\n", p);
    return 0;
}
int call(CallBackFun pCallBack, char *p) { // Ö´Ðлص÷º¯Êý£¬·½Ê½Ò»£ºÍ¨¹ýÃüÃû·½Ê½
    printf("call Ö±½Ó´òÓ¡³ö×Ö·û%s!\n", p);
    pCallBack(p);
    return 0;
}
int call2(char *p, int (*ptr)(char *p)) { // Ö´Ðлص÷º¯Êý£¬·½Ê½¶þ£ºÖ±½Óͨ¹ý·½·¨Ö¸Õë
    printf("==============\n", p);
    (*ptr)(p);
}
int call3(char *p, CallBackFun pCallBack){ // Ö´Ðлص÷º¯Êý£¬·½Ê½Ò»£ºÍ¨¹ýÃüÃû·½Ê½
    printf("--------------\n", p);
    pCallBack(p);
}
int main() { 
 
    char *p = "hello";
    call(Afun, p);
    call(Cfun, p);
    call2(p, Afun);
    call2(p, Cfun);
    call3(p, Afun);
    call3(p, Cfun);
    return 0;
}
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int gcd(int,int);
int lcm(int,int);
int gcd(int m,int n)
{
if(m%n==0)
return n;
else
return gcd(n,m%n);
}
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unsigned rev(unsigned x){
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