$$ Practice Test$1$

$1.$ What unfortunate misinterpretation can occur with the following declaration?

int$*$ intpPr$1,$ intPtr$2$;

Your Answer:

$2.$ What do the following statements print?

int values$[]=\{2,3,5\}$;

cout $<<*$values $+2<<""$;

cout $<<*($values $+2)<<$ endl;

Your Answer:

$3.$ Trace the following code that modifies the array. The write the modified array in the

space provided.

$1$ #include

$2$ using namespace std;

$3$

$4$ int main$()$

$5\{$

$6$ int values $=\{1,2,3,5,7,9\}$;

$7$ int$*$ p $=$ values;

$8$ int$*$ q $=$ values $+3$;

$9$ while $($p $<$ q$)$

$10\{$

$11$ int temp $=*$p;

$12*$p $=*$q;

$13*$q $=$ temp;

$14$ p$++$;

$15$ q$--$;

$16\}$

$17\}$

To trace the code, first fill in the

initial values of p and q as indices.

After that the loop starts.

p q temp $*$p $*$q

Answer: values$[]=$

$4.$ Find errors in memory allocation in the following segments:

code Explain the errors if any

int $$ p ;

$$p $=5$ ;

delete p ;

int $$ p $=$ new int $[10]$ ;

$$p $=5$

delete p ;

$5.$The following segment has errors. Locate as many as you can.

int$*$ getNum$()$

$\{$

int wholeNum;

cout $<<$ "Enter a number: $"$;

cin $>>$ wholeNum;

return &wholeNum;

$\}$

$6.$ Consider the following code:

string s$1,$ s$2("$Hello$")$;

cout $<<$ "Enter a line of input: $"$;

cin $>>$ s$1$;

if $($s$1==$ s$2)$

$\{$

cout $<<$ "Equal

$"$;

$\}$

else

$\{$

cout $<<$ "Not equal

$"$;

$\}$

If the dialogue begins as follows, what will be the next line of output?

Enter a line of input:

Hello friend

Your answer:

$7.$ Assume input is a char array holding a C$-$string. Write code that counts the number

of elements in the array that contain an alphabetic character.

$8.$ Write a function that accepts an int array and the array$$s size as arguments. The

function should create a new array that is twice the size of the argument array. The

function should copy the contents of the argument array to the new array and initialize

the unused elements of the second array with $0.$ The function should return a pointer to

the new array.