class to basic type?

[ganesh10888]

how to type convert class to basic type in c++?

[Ganon11]

You mean, say, converting a Plant class to a char?

It really can't be done...or, at least, shouldn't. What exactly are you trying to accomplish with this type conversion?

[weaknessforcats]

You write a conversion operator.

Suppose you had a Date class with ints for month day and year. You could convert a Date obejct to a const char* by:

Date::operator const char*()
{
   delete this->result;
   this->result = new string;
   *(this->result) + this->month;
   *(this->result) + "/";
   *(this->result) + this->day;
   *(this->result) + "/";
   *(this->result) + this->year;
   return this->result->c_str();
}
 

where result is a string*.

Once you do this, you can use a Date as a const char*. Assuming, that is, that the string layout is taken into account.