hi all

i want to add a pattern (say XYZ) after variable $lineNum in some tempFile.
How do i do this, preferably using sed ?

for eg.
Initially
line 1
line 2

if line 5 of a file needs to be replaced with contents of $line, how could we possibly do this using sed ?

My input file looks like this

abc def \
ghi jkl && mno || hju


My objective:
to replace '\' with line 2

newLine=`sed -n "2 p" inputFile`

Thanks for the input. I am using a win ox (cygwin) . What could be the possible workaround ?

Hi
i am trying to write a script to match a '\' at the END of the line.
For eg. i have a file Temp1 which contains :-


a = b + c \
+d;
printf("\n");

class A
{
int x;
public:
A(){}
~A()
{
cout<<this<<endl<<"bye"<<endl;
}
};

why is the size of an empty class 1 byte ? does the compiler add some null byte ?

what is the difference between a class declaration and a class definition ?
Is it that a class which contains the prototypes of member functions is a class declaration?
Is it that a class with...

class Base
{
public:
virtual void fn(){cout<<"fn base\n";}
virtual void myfn(){cout<<"myfn base\n";}
};

class Derived : private Base
{
private:

how many processes will be created when i fork() twice .

Is this logic correct ?

the 1st fork will spawn child C1 which is a child of the parent process P.
the code segment of the parent P is...

class A
{
public:
A()
{
cout<<"ctor A\n";
}

virtual void func(int x)
{

i have two classes. One is room and the other is container.Room is the class which you write, container is a 3rd party class, you can't change
the class definition of container.
in the constructor...

In Example 11, i expected the virtual ptr for derived class to be at

(int *)*((int *)(&obj)+3)

Hpwever, the VPTR is at

(int *)*((int *)(&obj)+0)

Can some body explain this please?

Query 2. When we instantiate an object in C++, a constructor gets called.
How is this implemented internally ?
What is the C++ run time library ? Does it come into the picture ?
I would also want...

thanks for the information ArkM. That was of great help. I tried out the following program and this is what i ended up with ( as expected !)


typedef int& Ref;
int a = 8;
int...

Thanks ! I got the perspective . What i did want to know was whether this was allowed as part of the ISO Standards for C++ .

This one is on References.

http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=/com.ibm.xlcpp8a.doc/language/ref/cplr110.htm

in the above link (from IBM), they clearly...

thanks !

When an object is instantiated, the constructor gets called ? How is this internally implemented ? Who Calls the Constructor ? Is it the OS ?