text1.cpp

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#include<iostream>
using namespace std;
char *strstr(char *s,char *t)
{
   char *ps=s,*pt,*pc;
   while(*ps!='\0'){
   for(pt=t,pc=ps;*pt!='\0'&&*pt==*pc;pt++,pc++)
    ;
   if(*pt=='\0')return ps;
   ps++;
   }
return 0;
}
void main(void)
{
 char s1[]="abcdefghijk",s2[]="fgh",*p;
 p=strstr(s1,s2);
 cout<<(void *)&s1[0]<<" "<<s1<<endl;
 cout<<(void *)p<<" "<<p<<endl;
}