Vamsi Pavan’s Place

main(){
printf(”%x”,-1

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Static variable
When static storage class is given, it is initialized once. The change in the value of a static variable is retained even between the function calls. Main is also treated like any other ordinary function, which can be called recursively.
extern storage class in the following declaration,
extern int i;
specifies to the compiler that the memory […]

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Full and Complete binary trees are different. All full binary trees are complete binary trees but not vice versa.
Full binary tree needs 2^n-1 nodes

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#include
typedef int INTEGER /* will work */
But
#define INTEGER int /* will also work*/
INTEGER SomeFunction()
{
…… code
return 0;
}
This will work
But Rule of thumb is
#defines are used for textual replacement whereas typedefs are used for introducing new names.

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sizeof(’a’) = 4

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main ()
{

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typedef int abc (int a, char *b);
int func2 (int a, char *b){

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Macro to swap any two variable int, char, float, struct etc..
/* Generic Swap macro*/
#define swap (a, b, type) {type t = a; a = b; b = t; }
Call the macro like this:
swap(a,b,int)
swap(a,b,str)

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char *a = “Hi how are you??”
a[0] = ‘h’;
This will output Segmentation fault
Because, such an intialization will create const memory and it can’t be modified.
While
char a[] = “Hi how are you??”
a[0] = ‘h’
will give the desired output.

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typedef does not define a new data type
There are three main reasons for using typedefs:
* It makes the writing of complicated declarations a lot easier. This helps in eliminating a lot of clutter in the code.
* It helps in achieving portability in programs. That is, if we use typedefs for data types that are machine […]

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