Thread: Noob tryin to make a library

I am working on a project for my class, and i am trying to put my functions into a library. It isnt working for some reason. here is what i have:
main file for my program:

Code:

/*	Name: Shawn Pappas
	CSC121-002
   	Program Title: My Liver for a Clock!
	Levels Attempted: 1) Add (Level 1) to display the time in a pretty format with leading 0's using a simple branch
					  2)Add (Level 2) to display the time in American format (AM-PM, that is) as well as 24-hour format.
					  3)Add (Level 1) to adjust the time from Greenwich Mean Time to US Central Time. 
	Program Description: This program takes the number of seconds since Jan. 1st 1970 (GMT) and converts it into the 
						 current time GMT. It also displays the current time in US Central Time. US Central Time is currently 
						 computed as -5 GMT because of Daylight Savings Time. Otherwise the conversion would be -6. 
						 I found the current hours by dividing the amount of seconds since Jan. 1st 1970 by how many seconds 
						 were in an hour,then used % to figure out how many hours were remaining that were not complete days.
						 I did the same for minutes and seconds. 
*/
#include <iostream>
#include <ctime>
#include "timegmt.h"
using namespace std;
int main()
{
	short hour_gmt, min, sec;
	const short sec_hour = 60*60, sec_min = 60, hour_day = 24;
	string colon = ":";
	time_t seconds;
	seconds = time (NULL);	
	hour_gmt = (seconds/sec_hour)%hour_day; // Calculates the currnet hours GMT
	min = (seconds/sec_min)%sec_min; // Calculates the current minutes GMT
	sec =  seconds%sec_min; //Calculates the current seconds GMT
	cout << endl << "The current time in GMT is " << hour_gmt << colon;
	lead_0(min); 
	cout << min << colon;
	lead_0(sec);
	cout << sec << ".";
// American Standard Time format AM/PM
	cout << " (";
	hour_ast(hour_gmt);
	lead_0(min);
	cout << min << colon;
	lead_0(sec);
	cout << sec;
	am_pm(hour_gmt);
// Convert to Central Time
	cout << "The current time CST (Central Standard Time) is ";
	cout << conv_cst(hour_gmt) << colon;
	lead_0(min);
	cout << min << colon;
	lead_0(sec);
	cout << sec << colon;
// CST American Standard Time format AM/PM
	cout << " (";
	hour_ast(conv_cst(hour_gmt));
	lead_0(min);
	cout << min << colon;
	lead_0(sec);
	cout << sec;
	am_pm(conv_cst(hour_gmt));
	return 0;
}

timegmt.h:

Code:

#ifndef TIMEGMT_H_INC
#define TIMEGMT_H_INC

void lead_0(short time);
void am_pm(short time);
void hour_ast(short time);
short conv_cst(short time);

#endif

and timegmt.c:

Code:

#include "timegmt.h"
#include <iostram>
using namespace std;


void lead_0(short time)
{
	if (time < 10)
	{
		cout << "0";
	}
	return;
}
void am_pm(short time)
{	
	if (time > 12)
	{
		cout << " PM.)\n";
	}
	else 
	{
		cout << " AM.)\n";
	}
	return;
}
void hour_ast(short time)
{
	if (time == 0) 
	{	 cout << "12:";
	}
	if (time > 12)
	{
		cout << time-12 << ":";
	}
	if ((time != 0) && (!(time > 12)))
	{
		cout << time << ":";
	}
	return;
}
short conv_cst (short time)
{
	short cst_conv = -5, hour_cst;
	if (time + cst_conv < 1)
	{
		hour_cst = time+24+cst_conv;
	}
	else
	{	
		hour_cst = time + cst_conv;
	}
	return(hour_cst);
}

Could someone please tell me what I am doing wrong?

Also, my instructor looked over my origional program before I tried to put the functions into a library, and wanted me to change my functions from:

Code:

 
void hour_ast(short time)
{
	if (time == 0) 
	{	 cout << "12:";
	}
	if (time > 12)
	{
		cout << time-12 << ":";
	}
	if ((time != 0) && (!(time > 12)))
	{
		cout << time << ":";
	}
	return;

to:

Code:

void hour_ast(short time)
{
	if (time == 0) 
	{	 cout << "12:";
	}
	else (time > 12)
	{
		cout << time-12 << ":";
	}
	if ((time != 0) && (!(time > 12)))
	{
		cout << time << ":";
	}
	return;

The problem is that it errors out when i compile it this way. Was my instructer wrong, or is there something else i should do?

What errors? not knowing which language you're using?
and timegmt.c: <---- this is C

#include <iostram> <--- this is C++, and an inability to spell.


If all is well, then all you should be doing is
g++ prog.cpp timegmt.cpp


> else (time > 12)
Try
else if (time > 12)

Like I said, you need to compile BOTH programs on the command line
Or add both to your project