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Chapter 3: Problem 38

include using namespace std; int main() { long x, y, z; x = y = z = 4; x += 2; y -= 1; z *= 3; cout << x << " " << y << " " << z << endl; return 0; } # . #include using namespace std; int main() { long x, y, z; x = y = z = 4; x += 2; y -= 1; z *= 3; cout << x << " " << y << " " << z << endl; return 0; }

Short Answer

Expert verified
Answer: After the program updates the values of the variables according to the specified operations, the final values are as follows: x = 6, y = 3, and z = 12. The output printed to the console is "6 3 12".

Step by step solution

01

Directives and Namespaces

In the beginning, the program uses a directive '#include ', which allows the program to use input and output streams, such as 'cin' and 'cout'. `using namespace std;` line tells the compiler to use the standard C++ library.
02

Main Function

The main function in a C++ program is the entry point for code execution. Here, we have an integer main function that will return 0 upon successful execution.
03

Declare and Initialize Variables

In this step, three long integer variables x, y, and z are declared and assigned an initial value of 4. In C++ code this is done by: long x, y, z; x = y = z = 4;
04

Updating the Values of 'x', 'y', and 'z'

Next, the values of the variables x, y, and z are updated: - x is incremented by 2: x += 2; - y is decremented by 1: y -= 1; - z is multiplied by 3: z *= 3; After these operations, the updated values of x, y, and z are: - x = 4 + 2 = 6; - y = 4 - 1 = 3; - z = 4 * 3 = 12;
05

Print the Results

Using 'cout << x << " " << y << " " << z << endl;', the updated values of 'x', 'y', and 'z' are printed to the console. The output will be: 6 3 12
06

Returning 0

The 'return 0;' statement signifies that the program executed successfully and indicates the end of the 'main' function.

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Most popular questions from this chapter

A retail store grants its customers a maximum amount of credit. Each customer's available credit is his or her maximum amount of credit minus the amount of credit used. Write a pseudocode algorithm for a program that asks for a customer's maximum amount of credit and amount of credit used. The program should then display the customer's available credit.

Assuming the array description is defined as follows: char description [40] A) How many characters total can the array hold? B) What is the length of the largest string that may be stored in the array? C) Will the following cin statement automatically stop reading input when the array is filled?

The __________ library function returns the value of a number raised to a power.

include #include using namespace std; int main() { long seconds; double minutes, hours, day鈥� # (Assume the user enters 36720152. Use a calculator.) #include #include using namespace std; int main() { long seconds; double minutes, hours, days, months, years; cout << "Enter the number of seconds that have\n"; cout << "elapsed since some time in the past and\n"; cout << "I will tell you how many minutes, hours,\n"; cout << "days, months, and years have passed: "; cin >> seconds; minutes = seconds / 60; hours = minutes / 60; days = hours / 24; years = days / 365; months = years * 12; cout << setprecision(4) << fixed << showpoint << right; cout << "Minutes: " << setw(6) << minutes << endl; cout << "Hours: " << setw(6) << hours << endl; cout << "Days: " << setw(6) << days << endl; cout << "Months: " << setw(6) << months << endl; cout << "Years: " << setw(6) << years << endl; return 0; }

The _______ library function returns the tangent of an angle.
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