Answer Posted / niraj verma

Multiple Inheritance:-

A class can inherit the attributes of two or more classes.
This is know as multiple inheritance. Multiple inheritance
allows us to combine the features of several existing
classes as a starting point for designing new classes. It is
like a child inheriting the physical features of one parent
and the intelligence of onother.

In Multiple
Inheritance the derived class inherit the properly of more
than one base class.



Example:-
# include<iosteam.h>
# include<conio.h>
Class A
{
Protected:
Int x;
Public:
Void getdata ( )
{
Cout<<”\n Enter any
number”;
Cin>>x;
}
};
Class B
Protected:
Int y;
Public:
Void getadta2 ( )
{
Cout<<”\n Enter any number”;
Cin>>y;
}
};
Class c: public A, public B
{
Private:
M, z;
Public:
Void getdata3 ( )
{
Cout<<”\n Enter
any number”;
Cin>>m;
}
Void calculate ( )
{
Z = x*y+m;
}
Void display (
)
{
Cout <<
“\n Result =”<<z;
}
};
Void main ( )
{
C obj;
Obj. getdata1 ( );
Obj. getdata2 ( );
Obj. getdata3 ( );
Obj. calculate ( );
Obj. display ( );
Getch ( );
}

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write a code for this. serial_number contained in the header of the file will be read , if this serial number is less than a previous serial number within a successfully processed file, or is the same as another serial number within a successfully processed file, or if the field contains anything other than 7 digits, then the file must error with the reason ‘Invalid SERIAL_NUMBER’.

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class CTest { public: void someMethod() { int nCount = 0; cout << "This is some method --> " << nCount; } }; int main() { CTest *pctest; pctest->someMethod(); return 0; } It will executes the someMethod() and displays the value too. how is it possible with our creating memory for the class . i think iam not creating object for the class. Thanks in Advance... Prakash

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