///////////////////////////////////////////////////////////////////////////
// Homework:1
// Exercise:2
//
// Summary: experience with simple function calls
// 
// Goals:
//
// 1 - modify f_to_c() so it takes one argument (temperature in fahrenheit)
// and returns the temperature (in centigrade)
//
// 2 - write c_to_f(), update main2.hh as necessary, and insert some calls to 
// the new function in main()
//
// 3 - check (and output) that f_to_c(c_to_f(x)) is x for any x by defining
// and identity(double x) function, takes a temperature (in fahrenheit), returns
// the result of f_to_c(c_to_f(x)), updating main2.hh and inserting some
// sample calls (and output) in main()
// 
// 4 - add meaningful, concise comments to all the above
//
///////////////////////////////////////////////////////////////////////////
#include <iostream.h> // for i/o library
#include "main2.hh" // our local header file


int main() // I'm not using argc, argv, so I'm using the simpler version of main()
{
	cout << "f_to_c(4.0) is "<<f_to_c(4)<<"\n";	
	return 0;
}

double f_to_c(double temp_f)
{
	// comment out this line after you
	// (0) get this program compiled and running
	// (1) note the order of output (stuff in main() compared to this)
	cerr << "[f_to_c: argument is:"<<temp_f<<"]\n"; 
	return temp_f;
}