15.what is the disadvantage of using macros?
16.what is the self-referential structure?
17.can a union be self-referenced?
18.What is a pointer?
19.What is the Lvalue and Rvalue?
20.what is the difference between these initializations?
21.Char a[]=”string”;
22.Char *p=”literal”;
23.Does *p++ increment p, or what it points to?
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Answer Posted / abdur rab
The difference between
21...in char a[]="string";
22... in char *p="literal";
is
in char a[]="string";, the memory is allocated, so the
value can be changed, it can be incremented, etc.
where as in char *p="literal";, you can just read it, may
be you can increment the pointer to point to the next
location, the content cannot be changed since this is a
string literal or BSS (Block Started by Symbol). This is
often called "const_data" or "data_const", or "literal".
23. *p++ it gets the content, and then increments the
pointer to the next location.
eg:
char a[] = {"string"};
char x;
char* p = (char*) a;
x = *p++;
printf ( "%c\n, %s\n", x, p );
output
======
s
tring
| Is This Answer Correct ? | 2 Yes | 0 No |
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