Question

/ File: temperature.cxx
// This program prints a table to convert numbers from one unit to another.
// The program illustrases some implementation techniques.

#include // Provides cout
#include // Provides setw function for setting output width
#include // Provides EXIT_SUCCESS
#include // Provides assert function
using namespace std; // Allows all standard library items to be used

double celsius_to_fahrenheit(double c)
// Precondition: c is a Celsius temperature no less than absolute
// zero (-273.16).
// Postcondition: The return value is the temperature c converted to Fahrenheit
// degrees.
{
const double MINIMUM_CELSIUS = -273.16; // Absolute zero in Celsius degrees
assert(c >= MINIMUM_CELSIUS);
return (9.0 / 5.0) * c + 32;
}

void setup_cout_fractions(int fraction_digits)
// Precondition: fraction_digits is not negative.
// Postcondition: All double or float numbers printed to cout will now be
// rounded to the specified digits on the right of the decimal.
{
assert(fraction_digits > 0);
cout.precision(fraction_digits);
cout.setf(ios::fixed, ios::floatfield);
if (fraction_digits == 0)
cout.unsetf(ios::showpoint);
else
cout.setf(ios::showpoint);
}

int main( )
{
const char HEADING1[] = " Celsius"; // Heading for table's 1st column
const char HEADING2[] = "Fahrenheit"; // Heading for table's 2nd column
const char LABEL1 = 'C'; // Label for numbers in 1st column
const char LABEL2 = 'F'; // Label for numbers in 2nd column
const double TABLE_BEGIN = -50.0; // The table's first Celsius temp.
const double TABLE_END = 50.0; // The table's final Celsius temp.
const double TABLE_STEP = 10.0; // Increment between temperatures
const int WIDTH = 9; // Number chars in output numbers
const int DIGITS = 1; // Number digits right of decimal pt

double value1; // A value from the table's first column
double value2; // A value from the table's second column
  
// Set up the output for fractions and print the table headings.
setup_cout_fractions(DIGITS);
cout << "CONVERSIONS from " << TABLE_BEGIN << " to " << TABLE_END << endl;
cout << HEADING1 << " " << HEADING2 << endl;
  
// Each iteration of the loop prints one line of the table.
for (value1 = TABLE_BEGIN; value1 <= TABLE_END; value1 += TABLE_STEP)
{   
value2 = celsius_to_fahrenheit(value1);
cout << setw(WIDTH) << value1 << LABEL1 << " ";
cout << setw(WIDTH) << value2 << LABEL2 << endl;
}

return EXIT_SUCCESS;
}

1) The source code must be well structured like include relevant comments like on the top include the version like 1.0 and 1.1, date, and a brief description of what the program does.

2) . As you make changes you can add one line description of the changes and change the version # or add a version #
like version 1.0 and 1.1

3) Write a short report (not to exceed 100 words) that describes the work done, the input, and output when executing the program.

Answer 1

2.

Screenshot of the code:

Sample Output:

Code To Copy:

//The error-free code is provided below:

// This program prints a table to convert numbers from one unit to another.

// The program illustrates some implementation techniques.

//Include the header file ostream for including all stream.

#include <iostream>// Provides cout

//Include iomanip that is used for set precision.

#include <iomanip> // Provides setw function for setting output width

//Header file for EXIT_SUCCESS.

#include <stdlib.h>// Provides EXIT_SUCCESS

//Header file for assert.

#include <assert.h>// Provides assert function

using namespace std; // Allows all standard library items to be used

double celsius_to_fahrenheit(double c)

// Precondition: c is a Celsius temperature no less than absolute

// zero (-273.16).

// Postcondition: The return value is the temperature c converted to Fahrenheit

// degrees.

{

const double MINIMUM_CELSIUS = -273.16; // Absolute zero in Celsius degrees

assert(c >= MINIMUM_CELSIUS);

return (9.0 / 5.0) * c + 32;

}

void setup_cout_fractions(int fraction_digits)

// Precondition: fraction_digits is not negative.

// Postcondition: All double or float numbers printed to cout will now be

// rounded to the specified digits on the right of the decimal.

{

assert(fraction_digits > 0);

cout.precision(fraction_digits);

cout.setf(ios::fixed, ios::floatfield);

if (fraction_digits == 0)

cout.unsetf(ios::showpoint);

else

cout.setf(ios::showpoint);

}

int main( )

{

const char HEADING1[] = " Celsius"; // Heading for table's 1st column

const char HEADING2[] = "Fahrenheit"; // Heading for table's 2nd column

const char LABEL1 = 'C'; // Label for numbers in 1st column

const char LABEL2 = 'F'; // Label for numbers in 2nd column

const double TABLE_BEGIN = -50.0; // The table's first Celsius temp.

const double TABLE_END = 50.0; // The table's final Celsius temp.

const double TABLE_STEP = 10.0; // Increment between temperatures

const int WIDTH = 9; // Number chars in output numbers

const int DIGITS = 1; // Number digits right of decimal pt

double value1; // A value from the table's first column

double value2; // A value from the table's second column

// Set up the output for fractions and print the table headings.

setup_cout_fractions(DIGITS);

cout << "CONVERSIONS from " << TABLE_BEGIN << " to " << TABLE_END << endl;

//Provide the correct style of heading before printing the

//headers Celcius and Fehrenhit.

cout << "   " << HEADING1 << "\t " << HEADING2 << endl;

// Each iteration of the loop prints one line of the table.

for (value1 = TABLE_BEGIN; value1 <= TABLE_END; value1 += TABLE_STEP)

{  

value2 = celsius_to_fahrenheit(value1);

cout << setw(WIDTH) << value1 << LABEL1 << " ";

cout << setw(WIDTH) << value2 << LABEL2 << endl;

}

return EXIT_SUCCESS;

}

Description of the program:

• The program is computing the temperature from Celsius to Fahrenheit.
• Along with computing the temperature values, the preconditions are also being taken care of.
• For formatting the output in the tabular form, some heading labels such as Celsius, Fahrenheit, C and F are defined.
• Also, the width, height and the table setups are defined in the main function.
• The temperature values are computed from -50 Celsius to 50 Celsius.
• For each predefined functions to be used, the required header files such as iostream, iomanip, assert and stdlib are included in the function.
• A function named as celsius_to_fahrenheit(double c) is defined that taken the temperature in Celsius as its parameter.
• In that function, the absolute zero value of Celsius is defined and the temperature from Celsius to Fahrenheit is computed and return the values in the main function.
• Also, a function setup_cout_fractions(int fraction_digits) is defined to set up the decimal point with the help of set precision.
• These functions are being called in the main and the values returned by these function along with proper heading are displayed in the output screen.
• At last the exit success is being returned by the main function.