Data Structure 3

Discussion:

Two functions G (), F ()

Call function f () in function g ()
Then, in F (), whether the memory allocated for F () can be used after F () is completed in G ().

We know that when F () is over, F () is gone.
However, when calling F (), the memory indeed allocates a block of memory for F ().

Can it be under G ()?CodeContinue calling the memory.

# Include <stdio. h>

Int F ();

Int main (void)
{
Int I = 10;
I = f ();
Printf ("% d", I );
Return 0;
}

Int F ()
{
Int J = 20;
Return J;
}

After calling F (), J will be absent.
This is only a static variable, but dynamic memory allocation is acceptable.

You see:
BelowProgramBy calling the fun function, the pointer P in the main function
Point to the Unit allocated for it in fun

Int main ()
{
Int * P;
Fun (P );
Return 0;
}
Void fun (int * P)
{
Int S = 5;
P = & S;

}