Question

Given that an integer variable count has already been declared and assigned a value: Write a statement that writes the value of count to standard output. Do not write anything else to standard output -- just the value of count. Instructor Notes: Note that a "statement" is a single command, usually on a single line of text. What kind of statement writes (outputs) to standard output?

Answer 1

/*  Assume sizeof(int) == sizeof(unsigned int) == 4 */

/*  and that UINT_MAX = 2^32 -1 */

int a = 1;

int b = -1;

a << b;  /*  Undefined because b is signed and negative (rule 3)  */

int c = -1;

int d = 1;

c << d;  /*  Undefined because c is signed and negative (rule 4) */

int e = 1;

int f = 31;

e << f  /*  Undefined because 2147483648 can't be represented in a 32 bit signed int */

unsigned int g = 1;

unsigned int h = 31;

g << h /*  Well defined because 2147483648 can be represented in a 32 bit unsigned int */

int i = 1;

int j = -1;

i >> j;  /*  Not defined.  j is negative, rule 3. */

int k = -1;

int l = 1;

k >> l;  /*  Implementation defined.  See rule 5. */

/*  Left shift cases where both operands are promoted to unsigned

   integers are well defined and equal to (E1 * 2^E2) mod UINT_MAX */

/*  Right shift cases where both operands are promoted to unsigned

   integers are well defined if E2 <= 31 */

/*  Right shift cases where both operands are promoted to unsigned

   integers are undefined if E2 > 31 */

/*  Conclusions contingent on 32 bit assumption stated above */

Answer 2

Answer:

cout<<count;

Explanation:

cout<<count;

The above is a C++ command will write to the standard output device (stdout).

That means that one is printing an output on the main output device for that session... whatever that may be (any output device such as monitor, printer, the user's console, a tty session, a file etc).

What that device may be varies depending on how the program is being run and from where.

The kind of statement that writes to standard output are print statement