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#include <iostream>
#include <iomanip>
using namespace std;
//prototypes
int GetConversionMethod(int method);
int GetTemperatureRange(int range);
void DisplayConversions(double temp, double temp2, int method, double interval);
double FahrenheitToCelcius(double temp);
double CelciusToFahrenheit(double temp);
void main()
{
char again;
double temp, temp2, interval=1;
//set up decimal points
cout.setf(ios::fixed, ios::floatfield);
cout.setf(ios::showpoint);
cout<<setprecision(2);
cout<<setw(50)<<"Temperature Conversion"<<endl<<endl;
cout<<"This program will convert celcius to fahrenheit.\n";
cout<<"You can calculate single temperature of a range. Follow the instructions.\n\n";
do
{
int method=0, range=0;
method = GetConversionMethod(method);
range = GetTemperatureRange(range);
if (range==1)
{
cout<<"Enter the temperature: ";
cin>>temp;
temp2=temp;
}//end if
if (range==2)
{
cout<<"Enter the first temperature: ";
cin>>temp;
cout<<"Enter the second temperature: ";
cin>>temp2;
cout<<"Enter the interval you wish Temperatures to increase by: ";
cin>>interval;
}//end if
DisplayConversions(temp, temp2, method, interval);
cout<<endl<<"Do you want to preform another calculation? <y or n>";
cin>>again;
cout<<endl<<endl;
}while(again=='y' || again=='Y');//end do-while
}//end main
int GetConversionMethod(int method)
/*
the function asks the user if they would like to convert Celcius to Fahrenheit
or Fahrenheit to Celcius.
It will repeat until the user enters 1 or 2.
Pre: none
Post: will return method to main
*/
{
while(method !=1 && method !=2)
{
cout<<"Do you wish to convert 1. Celcius to Fahrenheit or 2. Fahrenheit to Celcius: ";
cin>>method;
}//end while
return method;
}//end GetConversionMethod
int GetTemperatureRange(int range)
/*
this function asks if they would like to convert a single value or a range.
It will repeat untill they enter 1 or 2.
Pre: none
Post: Will return if they want a range or not back to main
*/
{
while (range !=1 && range !=2)
{
cout<<"Do you want to convert 1. A single value or 2. A range of values: ";
cin>>range;
}//end while
return range;
}//end GetTemperatureRange
void DisplayConversions(double temp, double temp2, int method, double interval)
/*
This function displays the conversions in a table.
It will also switch the two temperatures so that temp is less than temp2.
It also calculates the temperatures using a while loop, displaying
them each line.
Pre:the temp, temp2 method and interval all need to be entered.
Post: Upon completion, the program will display the converted temperatures.
*/
{
double temp3;
if (method==1)
cout<<" Celcius Fahrenheit"<<endl;
if (method==2)
cout<<" Fahrenheit celcius"<<endl;
if (temp2<=temp)
{
double a;
a=temp;
temp=temp2;
temp2=a;
}//end if
while (temp<=temp2)
{
if (method==1)
{
temp3=CelciusToFahrenheit(temp);
}//end if
if(method ==2)
{
temp3=FahrenheitToCelcius(temp);
}//end if
cout<<setw(9)<<temp<<setw(14)<<temp3<<endl;
}//end while
}//end DisplayConversions
double FahrenheitToCelcius(double temp)
/*
This function converst fahrenheit to celcius.
Pre:temp needs to be entered
Post: will return the converted temperatur back to display conversions
*/
{
double temp3;
temp3=(temp-32)*5/9;
return temp3;
}//end Celcius to Fahrenheit
double CelciustoFahrenheit(double temp)
/*
This function converts Celcius to Fahrenheit.
Pre: temp needs to be entered
Post: will return the converted temperature back to DisplayConversions
*/
{
double temp3;
temp3=temp*9/5+32;
return temp3;
}//end CelciusToFahrenheit
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