#include <include.h>

  char *strpbrk( char *s1, char *s2);

#include<stdio.h>
#include<string.h>
int main(void){
  char* s1 = "http://see.xidian.edu.cn/cpp/u/xitong/";
  char* s2 = "see";
  char* p = strpbrk(s1,s2);
  if(p){
    printf("The result is: %s\n",p);  
  }else{
    printf("Sorry!\n");
  }
  return 0;
}

The result is: see.xidian.edu.cn/cpp/u/xitong/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#pragma warning (disable:4996)
char *mystrpbrk(const char *cs,const char *ct);
int main(void)
{
 char *s1="Welcome to Beijing.";
 char *s2="BIT";
  char *s3;
 s3=mystrpbrk(s1,s2);
 printf("%s\n",s3);
 getch();
 return 0;
}
/*FROM 百科*/
char *mystrpbrk(const char *cs,const char *ct)
{
 const char *sc1,*sc2;
 for (sc1=cs;*sc1!='\0';sc1++)
 {
 for (sc2=ct;*sc2!='\0';sc2++)
 {
  if (*sc1==*sc2)
  {
  return (char *)sc1;
  }
 }
 }
 return NULL;
}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#pragma warning (disable:4996)
int main(void)
{
 char *s1="Welcome to Beijing.";
 char *s2="BIT";
 char *p;
 system("cls");
 p=strpbrk(s1,s2);
 if (p)
 {
 printf("%s\n",p);
 }
 else
 {
 printf("NOT Found\n");
 }
 p=strpbrk(s1,"i");
 if (p)
 {
 printf("%s\n",p);
 }
 else
 {
 printf("NOT Found\n");
 }
 getch();
 return 0;
}