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Write a program which prompts the user for the height,
width, and depth of a rectangular solid and computes and prints the
volume of the solid. The program should use ints
to store the values.
| Click Here To Run This Program On Its Own Page |
// Program: LAB03PR01
// Author: Joshua S. Hodas
// Date: October 6, 1996
// Purpose: Calculate volume of rectangular solid
import HMC.HMCSupport;
class LAB03PR01 {
public static void main(String args[]) {
int height, width, depth, volume;
HMCSupport.out.print("This program computes the volume of"
+ " a rectangular solid.");
HMCSupport.out.println();
HMCSupport.out.print("Please enter the height: ");
height = HMCSupport.in.nextInt();
HMCSupport.out.print("Please enter the width: ");
width = HMCSupport.in.nextInt();
HMCSupport.out.print("Please enter the depth: ");
depth = HMCSupport.in.nextInt();
volume = height * width * depth;
HMCSupport.out.println("The volume of a " + height
+ " x " + width + " x " + depth
+ " rectangular solid is " + volume);
}
}
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Write a program which asks the user for an annual salary
and tells them the equivalent hourly wage, based on working
forty hours per week for fifty weeks per year. You should use
doubles throughout the program. When you print the
hourly wage, do so with exactly two digits to the right of the decimal
(as you'd expect for monetary values).
| Click Here To Run This Program On Its Own Page |
// Program: LAB03PR02
// Author: Joshua S. Hodas
// Date: October 6, 1996
// Purpose: Translate annual salary to hourly wage
import HMC.HMCSupport;
class LAB03PR02 {
public static void main(String args[]) {
// We put the weeks per year and hours per week in
// variables even though they will only be used
// once. It improves the clarity of the program and
// makes it easier to change to one where the
// values are used more than once, or are entered by
// the user.
double annualSalary, hourlyWage,
hoursPerWeek = 40, weeksPerYear = 50;
HMCSupport.out.print("This program computes hourly wage"
+ " based on annual salary.");
HMCSupport.out.println();
HMCSupport.out.print("Please enter the annual salary: ");
annualSalary = HMCSupport.in.nextDouble();
hourlyWage = annualSalary / (hoursPerWeek * weeksPerYear);
// The numbers are printed in separat statements to
// give setPrecision and setFixed a chance to apply.
HMCSupport.out.setPrecision(2);
HMCSupport.out.setFixed(true);
HMCSupport.out.print("An annual salary of ");
HMCSupport.out.print(annualSalary);
HMCSupport.out.print(" works out to an hourly wage of ");
HMCSupport.out.println(hourlyWage);
}
}
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Write a program which asks the user for an angle in radians and tells them the value of
all three basic trig functions for that value.
| Click Here To Run This Program On Its Own Page |
/*
Program: LAB03PR03
Author: Joshua S. Hodas
Date: 9/19/98
Purpose: To print the trig functions' values for a user-supplied number
*/
import HMC.HMCSupport;
class LAB03PR03 {
public static void main(String args[]) {
double theta; // the angle
HMCSupport.out.print("Please enter an angle in radians: ");
theta = HMCSupport.in.nextDouble();
HMCSupport.out.println();
HMCSupport.out.println("sin(" + theta + ") = " + Math.sin(theta));
HMCSupport.out.println("cos(" + theta + ") = " + Math.cos(theta));
HMCSupport.out.println("tan(" + theta + ") = " + Math.tan(theta));
}
}
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Write a program which asks the user for an angle in radians and then prints output
that will allow the user to confirm some of the basic trig identities (i.e. sin2 + cos2 = 1)
| Click Here To Run This Program On Its Own Page |
/*
Program: LAB03PR04
Author: Joshua S. Hodas
Date: 9/19/98
Purpose: To confirm a trig identity
*/
import HMC.HMCSupport;
class LAB03PR04 {
public static void main(String args[]) {
double theta; // the angle
double sinTheta, cosTheta; // sin and cos of the angle
HMCSupport.out.print("Please enter an angle in radians: ");
theta = HMCSupport.in.nextDouble();
// We store of the value of the sine and cosine as we will need
// them more than once each (to compute the square) and they
// are expensive to calculate.
sinTheta = Math.sin(theta);
cosTheta = Math.cos(theta);
HMCSupport.out.println();
HMCSupport.out.println("sin(" + theta + ") = " + sinTheta);
HMCSupport.out.println("cos(" + theta + ") = " + cosTheta);
HMCSupport.out.println("sin^2(" + theta + ") + cos^2(" +
theta + ") = " +
(sinTheta * sinTheta + cosTheta * cosTheta));
}
}
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Write a program which displays a random floating point value in the range between
0 and 1.
| Click Here To Run This Program On Its Own Page |
/*
Program: LAB03PR05
Author: Joshua S. Hodas
Date: 9/19/98
Purpose: To print a random value in the range 0 to 1
*/
import HMC.HMCSupport;
class LAB03PR05 {
public static void main(String args[]) {
HMCSupport.out.println(Math.random() +
"is a random value in the interval [0.0,1.0)");
}
}
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Write a program which displays a random floating point value in the range between
0 and 10.
| Click Here To Run This Program On Its Own Page |
/*
Program: LAB03PR06
Author: Joshua S. Hodas
Date: 9/19/98
Purpose: To print a random value in the range 0 to 10
*/
import HMC.HMCSupport;
class LAB03PR06 {
public static void main(String args[]) {
HMCSupport.out.println((10 * Math.random()) +
"is a random value in the interval [0.0,10.0)");
}
}
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Write a program which simulates a throw of a pair of dice. That is,
it generates and reports two random integers from 1 to 6 and their sum.
| Click Here To Run This Program On Its Own Page |
/*
Program: LAB03PR07
Author: Joshua S. Hodas
Date: 9/19/98
Purpose: To print the trig functions' values for a random angle
*/
import HMC.HMCSupport;
class LAB03PR07 {
public static void main(String args[]) {
double theta = Math.random() * 2 * Math.PI; // the random angle
HMCSupport.out.println("A random angle in the range of 0 to 2*pi is " +
theta);
HMCSupport.out.println("sin(" + theta + ") = " + Math.sin(theta));
HMCSupport.out.println("cos(" + theta + ") = " + Math.cos(theta));
HMCSupport.out.println("tan(" + theta + ") = " + Math.tan(theta));
}
}
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Last modified August 28 for Fall 99 cs5 by fleck@cs.hmc.edu