error message compiling C# in xcode with defined functions

Hey,

I'm trying to compile a C# program that will link up to a max/msp patch working as sequencer and drum machine.

This is the code I'm trying to compile:

#include "aservelib.h"
#include <stdio.h>
#include "math.h"
#include <unistd.h>

void drums(void);
void synthesiser(void);

int main ()
{	
	int note;
	float frequency;
	float playfrequency;
	int sampleno;
	
	
	//void AserveSample(int sampleNumber, float amplitude);
	while(true)
	{
		note = AserveGetNote();
		frequency = 440.0 * pow(2.0, (note - 69.0) / 12.0);
	
		while(true)
		{
			int channel;
			channel = AserveGetNoteChannel();
			
			if (channel = 10)
			{				
				drums();				
			}
			else if (channel = 1)
			{				
				synthesiser();
			}
				
		return 0;
	}
		}
	
		
	void drums(void);		
		{
			
		switch(note)
		
		{

			case 10:
				sampleno = 0;
				break;
			case 11:
				sampleno = 1;
				break;
			case 12:
				sampleno = 2;
				break;
			case 13:
				sampleno = 3;
				break;
			case 14:
				sampleno = 4;
				break;
			case 15:
				sampleno = 5;
				break;
			case 16:
				sampleno = 6;
				break;
			case 17:
				sampleno = 7;
				break;
				
				
			default:
				printf("invalid Number");
				break;
		}	
	
		AserveSample(sampleno, 1.0);
		}
		
	void synthesiser(void);
		
		{
		
		switch(note)
		{
				
			case 60:
			playfrequency = frequency;
			break;
			
			case 61:
				frequency = playfrequency;
				break;
				
			case 62:
				frequency = playfrequency;
				break;

			case 63:
				frequency = playfrequency;
				break;
				
			case 64:
				frequency = playfrequency;
				break;

			case 65:
				frequency = playfrequency;
				break;

			case 66:
				frequency = playfrequency;
				break;

			case 67:
				frequency = playfrequency;
				break;

			case 68:
				frequency = playfrequency;
				break;

			case 69:
				frequency = playfrequency;
				break;

			case 70:
				frequency = playfrequency;
				break;

			case 71:
				frequency = playfrequency;
				break;

			case 72:
				frequency = playfrequency;
				break;
				
			default:
				printf("invalid Number");
				break;
				
		}
		
		AserveOscillator(0, playfrequency, 1.0, 0);
		
		}
}

The error message I get is:

Linking /network/path/ "drums()", referenced from: _main in main.o symbol(s) not found collect2: Id returned 1 exit status Build failed (2 errors)

I am using xcode and can't work it out!

bump

This is C code... not C# code.

Whoops, my bad. Can you tell I've only been doing this a few weeks?

Does anyone have a reply as to what the error might be about?

1. Your brackets are all screwed up. It kinda looks like you're trying to create drums() and synthesizer() as functions within the main() function. C doesn't support nested functions. Make them all top-level.

1. Remove the semicolon after the second "void drums(void)", and the second "void synthesizer(void)". A semicolon says "this is the end", which is what you want for the prototypes (at the top), but not for the actual function definitions.