Question

 Explain any two types of type conversion in C++ with example. 

Answer 1

 (i) Conversion from built-in type to class type
Basic to class type :
The constructor can be used for default type conversion from argument’s type to the constructor’s class type.
For e.g.
class time
{
int hr ;
int min ;
public :
______
time (int t) // constructor
{
hr = t / 60; //t in minutes
min = t % 60;
}
};
The following conversion statements can be used in a function. time T1; // object T1 is created.
int duration = 90;
T1 = duration // int to class type
After this conversion, the hr member of T1 will contain a value of 1 and min contain 30 means 1 hour and 30 minutes.
(ii) Conversion from one class to another class
One class to another class type :.
Use one-argument constructor or conversion function depends upon the defining conversion routine in source class or destination class.
For e.g.
obj A      =     obj B

    ↓                    ↓
Destination      source
Constructor is placed in the destination class and conversion function is placed in  source class.