Question

// 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 <v1.0>

//Include iomanip that is used for set precision.

#include <iomanip> //Provides setw function for setting output width <v1.1>

//Header file for EXIT_SUCCESS.

#include <stdlib.h>// Provides EXIT_SUCCESS <v1.2>

//Header file for assert.

#include <assert.h>// Provides assert function <1.3>

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. <1.5>

{

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.<v1.6>

{

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 Celsius and Fahrenheit.

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

// Each iteration of the loop prints one line of the table. <v1.7>

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;

}

NEED A report on this C++ code. abt 100 words.

Answer 1

This program written in C++ is used to convert a temperature in Celsius to Fahrenheit. Note that the formula for converting a temperature in celsius to Fahrenheit is given as:

F = (9.0 / 5.0) * C + 32

Now, this program converts the temperature in celsius in the range [-50, 50] at the increment of 10, i.e., it converts the following temperatures to Fahrenheit and display them in a tabular form.

Celsius Temperatures: -50, -40, -30, -20, -10, 0, 10, 20, 30, 40, 50

Equivalent Fahrenheit temperatures: -58.0F, -40.0F, -22.0F, -4.0F, 14.0F, 32.0F, 50.0F, 68.0F, 86.0F, 104.0F, 122.0F

The output of the code is given as: