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(Acoustics) The loudness of a sound is measured in units of decibels and is calculated as shown:
SL is the intensity of the sound being measured.
RL is a reference sound-intensity level.
Using this formula, write a C++
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Chapter 3 Solutions
C++ for Engineers and Scientists
- (Electrical eng.) The amplification of electronic circuits is measured in units of decibels, which is calculated as the following: 10LOG(Po/Pi) Po is the power of the output signal, and Pi is the power of the input signal. Using this formula, write, compile, and run a C++ program to calculate and display the decibel amplification, in which the output power is 50 times the input power. Verify your program’s result by doing a hand calculation. After verifying that your program is working correctly, use it to determine the amplification of a circuit, where output power is 4.639 watts and input power is 1 watt.arrow_forwardLanguage: C++ (Apartment problem) A real estate office handles , say, 50 apartment units. When the rent is, say, $600 per month, all the units are occupied. However, for each, say $40 increase in rent, one unit becomes vacant. Moreover, each occupied unit requires an average of $27 per month for maintenance. How many units should be rented to maximize the profit? Write a program that prompts the user to enter: The total number of units. The rent to occupy all the units. The increase in rent that results in a vacant unit. Amount to maintain rented unit. The program then outputs the number of units to be rented to maximize the profit. Note: Please include the pseudocodearrow_forwardInstructions(C++) A company hired 10 temporary workers who are paid hourly and you are given a data file that contains the last name of the employees, the number of hours each employee worked in a week, and the hourly pay rate of each employee. You are asked to write a program that computes each employee’s weekly pay and the average salary of all employees. The program then outputs the weekly pay of each employee, the average weekly pay, and the names of all the employees whose pay is greater than or equal to the average pay. If the number of hours worked in a week is more than 40, then the pay rate for the hours over 40 is 1.5 times the regular hourly rate. Use two parallel arrays: a one-dimensional array to store the names of all the employees (Name) a two-dimensional array of 10 rows and 3 columns to store the number of hours an employee worked in a week (Hrs Worked), the hourly pay rate (Pay Rate), and the weekly pay (Salary). Your program must contain at least the following…arrow_forward
- (c++) int x = 0, y = 10, z = -5; while ( z < x || y > x ) { y + = z; x -- ; z ++; } x = y = z =arrow_forward(25 min) The following table shows the foreign exchange rates for a few currencies. Foreign Currency RM USD (D) 1 Dollar 4.16 GBP (P) 1 Pound 5.68 KRW (W) 1000 Won 3.51 JPY (Y) 100 Yen 3.69 Develop a complete C++ program that will prompt the user to enter the currency preferred and the amount required. The program should include a function with the following prototype: double CurrencyBuy(char, double): The first parameter in the function prototype is for the type of currency where the characters D, P, W and Y represent Dollar, Pound, Won and Yen respectively. The second parameter is the amount to be bought. This function CurrencyBuy should return, to the calling function, the payment to be paid in RM. A sample of the output is given as follows. Foreign Exchange Currency Country Code USD (D) GВР (Р) KRW (W) JPY (Y) Enter the country code: D Enter the amount to be bought: 300 Payment due is RM 1248.arrow_forward( C PROGRAMMING ONLY) 2. Solving a Person's Lonelinessby CodeChum Admin It's been 1,245 years and our sole Person is getting lonelier each day. This Person definitely needs a partner! Thus, we need to update our Person's design to have a gender as well and there shall be male and female! Instructions: In the code editor, you are provided with the definition of a struct Person. This struct needs an integer value for its age. Furthermore, you are provided with a displayPerson() function which accepts a struct Person as its parameter.Your task is to first update the struct Person so that it can have a gender as well. For this program, we shall represent a gender with a single character: 'M' for male and 'F' for female.Then, create a Person, take in an integer user input and a character user input, and then set them as the Person's age and gender respectively.Finally, call the displayPerson() function and pass that Person you created.Input 1. The age of the Person 2. The gender of…arrow_forward
- (C++ Programming language) There are following two major issues associated with cpp programs:• When a program is terminated, the entire data is lost. • If you have to enter a large number of data, it will take a lot of time to enter them all in the different programs.Suggest a solution and elaborate the same with the help of suitable examples.arrow_forward(a) Write a C++ program to calculate the charges of a phone call. The call rate is as follows: Charge ($) Each minute 0.10 cent Call Duration First 10 minutes Every additional minute Each minute 0.15 cent Prompt the user to enter the call duration in floating-point format. For example, 3.2 is equivalent to 3 minutes and 2 seconds. If the input is 3.2 minutes, it is considered as 4 minutes. Display the total with two decimal places.arrow_forwardCreate a C++ program that uses a function to calculate and display monthly electricity bill based on the customer's electricity consumption units. [Use Global variables] a) Up to 2000 units of electricity, a charge of 30 Fils per unit is applied (1 AED 100 Fils) b) For consumption of more than 2000 units but less than 4000, a charge is calculated using the following scale: the first 2000 units are charged at 30 fils, and the remaining units are charged at 40 Fils. Note: 5% VAT to be added to the total bill amount. The user must enter the number of units consumed, and the program should calculate the total bill in UAE Dirhams. A screenshot is provided below, which you may find useful (data used here just for illustration purpose) Electricity Bill Calculator. Please input Your Monthly Electricity ConsumptioninUnits:2500 Your Electricitybill: 840AED If any data is missing, make an appropriate assumption. ED F9 F3 F4 F5 F6 F7 F8 23 3 & 4 1 5V 8. E T Y. 7 5arrow_forward
- (Use Python) The function course_average should calculate and return the average of the three values pass to it. The function main should ask the user to enter three grades and then pass these values to the course_average function. This function should also display a message to the user in the format below. For example, if the user entered 100, 90 and 95 the message would be:The average of 100 , 90 and 95 is 95arrow_forward(C++ OOP) We have a house with 3 rooms.We need the user to enter 1 integer as the window number, 2 doubles as depth and width of the room, 1 double as the useless area, 1 boolean as the door's opening direction (e.g. 0 is outward).Program will compute and print the air condition as a string and the total useful area of the house as a double. Calculating the air condition: Name it air_c. Divide the useful area by the window number. If air_c >20, output "bad". If air_c <11 output "good". If 11<=air_c<=20, output "ideal". Attention: If the window number is 0, air condition is bad. Calculating the useful area of room: Width*Depth-(useless area)if the door is inward;Width*Depth-(useless area)-0.8The worst air condition of the 3 is the final air condition of house. --- 1)The information about the home must be all private within a class.2)The class must get these inputs within constructor func.3)Calculating the useful area of a room must be done within a function of a class.4)Air…arrow_forward(C PROGRAMMING ONLY) 1. Leap Year Detectorby CodeChum Admin Let’s try to find out whether a year has 365 or 366 days. To do this, we need to create a leap year detector! Conditions for a leap year: 1.) year must be divisible by 4 and not divisible by 100 2.) If year is divisible by 100, it must be divisible by 400 for it to be a leap year. Instructions: You are provided with the isLeapYear() function which is already declared and defined for you.Your task is to ask the user for a year and then call the isLeapYear function to check whether the year is a leap year or not.Input 1. Year to be checked Output If a certain year is a leap year, print "<INSERT_YEAR_HERE> is a leap year"Otherwise, print "<INSERT_YEAR_HERE> is not a leap year" Enter year: 20202020 is a leap yeararrow_forward
C++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology Ptr