Passing structures to a function

[gatmalice]

I'm really lost on how to pass my structure to a function.

Basically I have the listed structures, and I need to pass them to a function for conversion. Can someone please help me?

#include <iostream>		// contains cout/cin functions
#include <cmath>		// contains trig functions
using namespace std;
//______________________________________________________________________________
// Prototypes:
    //void convert_to_radians(char, int, int, int, double&, double&);
	void convert_to_radians(point);
//______________________________________________________________________________
// Main function:
int main() {

	const double RADIUS = 3958.89;

	struct coordinate {
		char direction;
		double degrees;
		double minutes;
		double seconds;
	} ;

	struct point {
		coordinate latitude;
		coordinate longitude;
		double alpha;
		double beta;
	} first, second;

	double theta;

	cout << "This program will calculate the distance between two coordinates on Earth." << endl
		<< "Please enter your coordinates in the following format:" << endl
		<< "	(N, S, E, or W) (Degrees) (Minutes) (Seconds)" << endl
		<< "	i.e. N 95 18 35" << endl
		<< "Enter the latitude of the first coordinate:" << endl;
	cin >> first.latitude.direction >> first.latitude.degrees >> first.latitude.minutes >> first.latitude.seconds;
	cout << "Enter the longitude of the first coordinate:" << endl;
	cin >> first.longitude.direction >> first.longitude.degrees >> first.longitude.minutes >> first.longitude.seconds;
	cout << "Enter the latitude of the second coordinate:" << endl;
	cin >> second.latitude.direction >> second.latitude.degrees >> second.latitude.minutes >> second.latitude.seconds;
	cout << "Enter the longitude of the second coordinate:" << endl;
	cin >> second.longitude.direction >> second.longitude.degrees >> second.longitude.minutes >> second.longitude.seconds;

	convert_to_radians(point);
	system("PAUSE");
    return 0;
}
//______________________________________________________________________________
// Function definitions:
    
//void calc_maximum(int Val1, int Val2, int Val3, int Val4, int& Max1, int& Max2) {
void convert_to_radians(point) {

	double degrees=0;

	cout << degrees << endl;

	degrees += first.latitude.degrees;

	cout degrees << endl;
	
}

I get the following errors:

1>------ Build started: Project: project1, Configuration: Debug Win32 ------
1>  main.cpp
1>c:\users\matt\dropbox\egr125\project\project1\project1\main.cpp(7): error C2065: 'point' : undeclared identifier
1>c:\users\matt\dropbox\egr125\project\project1\project1\main.cpp(7): error C2182: 'convert_to_radians' : illegal use of type 'void'
1>c:\users\matt\dropbox\egr125\project\project1\project1\main.cpp(43): error C2275: 'main::point' : illegal use of this type as an expression
1>          c:\users\matt\dropbox\egr125\project\project1\project1\main.cpp(21) : see declaration of 'main::point'
1>c:\users\matt\dropbox\egr125\project\project1\project1\main.cpp(51): error C2065: 'point' : undeclared identifier
1>c:\users\matt\dropbox\egr125\project\project1\project1\main.cpp(51): error C2448: 'convert_to_radians' : function-style initializer appears to be a function definition
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

I suppose I'm really just not sure what is going on exactly. I read the tutorial and it seems to work well for their case, but I'm not sure how to apply that to my program. If I move my structures outside the main function, I get a lot more errors.

Thanks for the assistance in advance!

[zb0S216C]

The first error is pointing to the argument list on line 51. Your first and only argument is incomplete.

point is declared and defined locally to main. However, convert_to_radians( ) is global. Here's a hint: point does not exist to convert_to_radians( ).