Chapter 3, Problem 34CP

Given: The following code:

int x = 1, a = 3;

if (a == 1)

x += 5;

else if (a == 2)

x += 10;

else if (a == 3)

x += 16;

else if (a == 4)

x += 34;

To find: The final value of the variable x after the complete execution of the code.

Solution:

The value of x at the end of the code will be 17 as the value of x is initialized with by 1 and a is initialized by 3. If the else if (a == 3) block will be evaluated as true, then inside the else if block, the value of x will be added to 16. Hence, the value of x will become 17. The other if and else blocks will be evaluated as false.

Program-

// Including header file

#include

// Including header file

#include

//Decalaring namespace

using namespace std;

// Declaring main of code

int main() {

// Declaring the variables...

Given: The following code:

int x = 1, a = 3;

if (a == 1)

x += 5;

else if (a == 2)

x += 10;

else if (a == 3)

x += 16;

else if (a == 4)

x += 34;

To find: The equivalent statement by using the switch statement and the switch statement flow chart

Solution:

The following is the statement equivalent to the if-statement with the help of switch-statement.

switch(a)

{

case 1:

// Assigning the value.

x += 5;

// Using the break-keyword.

break;

case 2:

// Assigning the value.

x += 10;

// Using the break-keyword.

break;

case 3:

// Assigning the value.

x += 16;

// Using the break-keyword.

break;

case 4:

// Assigning the value.

x += 34;

}

Program-

// Including header file

#include

// Including header file

#include

//Declaring namespace

using namespace std;

// Declaring the main of code

int main() {

// Variable declaration

int x = 1, a = 3;

switch(a)

{

case 1:

// Assigning the value...