could you please do not use <string.h>

Sure! Instead of using <string.h>, we can use the string functions provided by the C++ Standard Library.

For example, instead of using strcpy(), we can use the string assignment operator "=" to copy the contents of one string to another:

#include <iostream>
#include <string>

int main() {
    std::string str1 = "Hello";
    std::string str2 = str1; // str2 now contains "Hello"
    std::cout << str2 << std::endl;
    return 0;
}

Similarly, we can use the string member function length() to get the length of a string:

#include <iostream>
#include <string>

int main() {
    std::string str = "Hello";
    std::cout << "Length of string is: " << str.length() << std::endl;
    return 0;
}

And instead of using strcat(), we can use the string member function append() to concatenate two strings:

#include <iostream>
#include <string>

int main() {
    std::string str1 = "Hello";
    std::string str2 = " world!";
    str1.append(str2);
    std::cout << str1 << std::endl; // prints "Hello world!"
    return 0;
}

I hope that helps! Let me know if you have any further questions.