Please Help! Function does not take 1 parameters

[imprudentspace]

My program converts from Fahrenheit to Celsius and vice versa, with the option of displaying the Kelvin temperature with a Y/N message. When compiling, two error messages pop up saying function does not take 1 parameters in regards to the showDegreesK function. Can someone figure out what I need to do to fix this?

#include "stdafx.h"
#include <iostream>

using namespace std;
using namespace System;

double FtoC(double t);
double CtoF(double t);
double showDegreesK(char kchoice, int, double);

int main()
{
	double temp, result;
	int choice;
	char kchoice;

	cout << "Welcome to the temp conversion program." << endl;

	do
	{
		cout << "Would you like to see degrees Kelvin (K) in the results? (Y/N): ";
		cin >> kchoice;
		cout << "\nConversion Type (1=F to C, 2=C to F, 0=Quit: ";
		cin >> choice;

		if (choice == 1)
		{
			cout << "Enter your Fahrenheit temp: ";
			cin >> temp;

			result = FtoC(temp);
			cout << "A temp of " << temp << "F is equal to " << result << "C." << endl;
			showDegreesK(kchoice);
		}

		else if (choice == 2)
		{
			cout << "Enter your Celcius temp: ";
			cin >> temp;

			result = CtoF(temp);
			cout << "A temp of " << temp << "C is equal to " << result << "F." << endl;
			showDegreesK(kchoice);
		}
	} while (choice != 0);

	cout << "\nThanks for using the temp converter!" << endl;
	system("Pause");
    return 0;
}

double FtoC(double t)
{
	double r;
	r = (5.0/9.0 * (t - 32.0));

	return r;
}

double CtoF(double t)
{
	double r;
	r = ((9.0 / 5.0) * t) + 32;

	return r;
}

double showDegreesK(char kchoice, int choice, double result)
{
	double kresult;

	if (kchoice == 'Y' && choice == 1)
	{
		kresult = result + 273.15;
	}

	else if (kchoice == 'Y' && choice == 2)
	{
		kresult = (result + 459.67) * (5.0/9.0);
	}

	return kresult;
}

[Peter87]

The showDegreesK function have three parameters (kchoice, choice and result) but you are only passing one argument (kchoice).

[imprudentspace]

I've put choice and result in the parameter and more errors show up. Can you show me what to change for the code to work?

[Peter87]

The problem is when you call the function.

showDegreesK(kchoice); // You only pass one argument but the function expects three. 

If you only want to pass one argument to the function you need to change the function (line 9 and 68) so that it only have one parameter.

[dhayden]

You need to think about what showDegrees() should do. Looking at your main program, I suggest something like:

// If kchoice is 'Y' then convert "celcius" to kelvin and print it.
// In either case, print a newline 

Now write that code to do that:

// If kchoice is 'Y' then convert "celcius" to kelvin and print it.
// In either case, print a newline
void
showDegreesK(char kchoice, double celcius)
{
    if (kchoice == 'Y') {
        double kelvin = celcius + 273.15;
        cout << " and " << kelvin << 'K';
    }
    cout << endl;
}

This is an important point: decide what your functions should do first, then write code to do that.

Change the declaration at line 9 to match this definition.

Also don't print the endl at lines 32 and 42. showDegrees will do that for you.