Let f be the following C++ function:

void f (char *p)

{

char *q = p;

while (*q)

q++;

while (p < q) {

char ch = *p;

*p++ = *--q

*q = ch;

}

}

Assume that the argument to f is C-style (null-terminated)string.

A) What modification does f perform to the string that ispassed to it?

B) Explain how f works.