strstr implementation from scratch

#include <iostream>

const char *mystrstr(const char *p, const char *q);

int main()
{
    char t1[256] = {0};
    char t2[256] = {0};

    std::cout << "Enter a string: ";
    std::cin.getline(t1, 256);

    std::cout << "Search for: ";
    std::cin.getline(t2, 256);

    if( const char *p = mystrstr(t1, t2) )
        std::cout << "Found: " << p << std::endl;
    else
        std::cout << "Not found!" << std::endl;

    return 0;
}

const char *mystrstr(const char *p, const char *q)
{
    for( ; *p; ++p)
    {
        const char *p_tmp = p;
        const char *q_tmp = q;

        for( ; *p_tmp == *q_tmp && *q_tmp; ++p_tmp, ++q_tmp);
        if( !*q_tmp ) return p;
    }
    return 0;
}
/* Sample run:

Enter a string: Hello World
Search for: Wo
Found: World

Enter a string: Hi Daniweb!
Search for: Hill
Not found!
*/