C Questions 1 3 points The most common logical operators are

C++ Questions!!!

1) [3 points] The most common logical operators are and, or, and not, but there are other ones. Research and complete truth tables for the following operators:

          a) Exclusive or (XOR)

“xor” operator truth table

Left side

Right side

Result

          b) Implication (®)

“implication” operator truth table

Left side

Right side

Result

          c) Biconditional («)

“biconditional” operator truth table

Left side

Right side

Result

2) [4 points] What will the following program segments print?

          a)

int x = 1;

while (x < 10);

x = x + 1;

cout << x;

          b)

int x = 1;

while (x < 10)

x = x + 1;

cout << x;

          c)

for (int count = 1; count <= 10; count++)

{

cout << ++count << “ “;

}

          d)

for (int row = 1; row <= 3; row++)

{

cout << “\ $”;

for (int digit = 1; digit <= 4; digit++)

    cout << ‘9’;

}

3) [12 points] List any syntax or logic errors in the following program segments.

          a)

int num1 = 0, num2 = 10, result;

num = num + 1;

result = ++(num1 + num2);

cout << num1 << “ “ << num2 << “ “ << result;

          b)

int num1, num2;

char again;

while ((again == ‘y’) || (again == ‘Y’))

cout << “Enter two numbers: “;

cin >> num1 >> num2;

cout << “Their sum is “ << (num1 + num2) << endl;

cout << “Do you want to do this again? “;

cin >> again;

          c)

int num, bigNum, power, count;

cout << “Enter an integer: “;

cin >> num;

cout << “What power do you want it raised to? “;

cin >> power;

bigNum = num;

while (count++ < power);

bigNum *= num;

cout << “The result is “ << bigNum << endl;

          d)

int numCount, total;

double average;

cout << “How many numbers do you want to average? “;

cin >> numCount;

for (int count = 0; count < numCount; count++)

{

int num;

cout << “Enter a number: “;

cin >> num;

total = total + num;

count = count + 1;

}

average = total / numCount;

cout << “The average is << average << endl;

4) [6 points] What is the difference between a void function and a value function? Give an example of each.

          a) Difference

          b) void function example

          c) value function example

“xor” operator truth table
Left side	Right side	Result

Solution

INPUTS

OUTPUT

LEFT SIDE

RIGHT SIDE

RESULT(XOR)

0

0

0

0

1

1

1

0

1

1

1

0

INPUTS

OUTPUT(IMPLICATION)

LEFT SIDE/P

RIGHT SIDE/Q

RESULT(P->Q)

(Q->P)

T

T

T

T

T

F

F

T

F

T

T

F

F

F

T

T

INPUTS

OUTPUT(BICONDITIONAL)

LEFT SIDE/P

RIGHT SIDE/Q

RESULT(P<-->Q)

T

T

T

T

F

F

F

T

F

F

F

T

INPUTS	OUTPUT
LEFT SIDE	RIGHT SIDE	RESULT(XOR)
0	0	0
0	1	1
1	0	1
1	1	0