This program prints out a conversion table of temperatures, after
prompting the user for upper and lower bounds of the table in Fahrenheit,
and the temperature difference between table entries
#include <iostream>
#include <iomanip>
using namespace std;
double celsius_of(int fahr);
double absolute_value_of(int fahr);
void print_preliminary_message();
void input_table_specifications(int& lowest_entry, int& highest_entry, int& step_size);
void print_message_echoing_input(int lowest_entry, int highest_entry, int step_size);
void print_table(int lowest_entry, int highest_entry, int step_size);
/* START OF MAIN PROGRAM */
int main()
{
int lower = 0; /* for the lowest Fahrenheit entry in the table */
int upper = 0; /* for the highest Fahrenheit entry in the table */
int step = 1; /* for the difference in Fahrenheit between entries */
/* set the tabbing functions in iostream.h to left-justify */
cout << setiosflags (ios::left);
/* print a message explaining what the program does: */
print_preliminary_message();
/* prompt the user for table specifications in Fahrenheit: */
input_table_specifications(lower, upper, step);
/* print an appropriate message including an echo of the input: */
print_message_echoing_input(lower, upper, step);
/* Print the table (including the column headings): */
print_table(lower, upper, step);
return 0;
}
/* END OF MAIN PROGRAM */
/* FUNCTION TO CONVERT FAHRENHEIT TO CELSIUS */
double celsius_of(int fahr)
{
return (static_cast<double>(5)/9) * (fahr - 32);
}
/* END OF FUNCTION */
/* FUNCTION TO CONVERT FAHRENHEIT TO ABSOLUTE VALUE */
double absolute_value_of(int fahr)
{
return ((static_cast<double>(5)/9) * (fahr - 32)) + 273.15;
}
/* END OF FUNCTION */
/* START OF FUNCTION */
void print_preliminary_message()
{
cout << "This program prints out a conversion table of temperatures." << endl << endl;
}
/* END OF FUNCTION */
/* START OF FUNCTION */
void input_table_specifications(int& lowest_entry, int& highest_entry, int& step_size)
{
cout << "Enter the minimum (whole number) temperature" << endl;
cout << "you want in the table, in Fahrenheit: ";
cin >> lowest_entry;
cout << "Enter the maximum temperature you want in the table: ";
cin >> highest_entry;
cout << "Enter the temperature difference you want between table entries: ";
cin >> step_size;
cout << endl << endl;
}
/* END OF FUNCTION */
/* START OF FUNCTION */
void print_message_echoing_input(int lowest_entry, int highest_entry, int step_size)
{
cout << "Tempertature conversion table from " << lowest_entry << " Fahrenheit" << endl;
cout << "to " << highest_entry << " Fahrenheit, in steps of ";
cout << step_size << " Fahrenheit:" << endl << endl;
}
/* END OF FUNCTION */
/* START OF FUNCTION */
void print_table(int lowest_entry, int highest_entry, int step_size)
{
int fahr;
/* Print table heading */
cout.width(17);
cout << "Fahrenheit";
cout.width(13);
cout << "Celsius" << "Absolute Value" << endl << endl;
/* set format of individual values */
cout.precision(2);
cout.setf(ios::fixed);
/* print table from lowest_entry to highest_entry */
for (fahr = lowest_entry ; fahr <= highest_entry ; fahr += step_size) {
cout << " ";
cout.width(15);
cout << fahr;
cout.width(15);
cout << celsius_of(fahr) << absolute_value_of(fahr) << endl;
}
}
/* END OF FUNCTION */
OUTPUT:
This program prints out a conversion table of temperatures.
Enter the minimum (whole number) temperature
you want in the table, in Fahrenheit: 5
Enter the maximum temperature you want in the table: 55
Enter the temperature difference you want between table entries: 5
Tempertature conversion table from 5 Fahrenheit
to 55 Fahrenheit, in steps of 5 Fahrenheit:
Fahrenheit Celsius Absolute Value
5 -15.00 258.15
10 -12.22 260.93
15 -9.44 263.71
20 -6.67 266.48
25 -3.89 269.26
30 -1.11 272.04
35 1.67 274.82
40 4.44 277.59
45 7.22 280.37
50 10.00 283.15
55 12.78 285.93
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