RE: [BULK] get minutes of system time as int in c++

  • From: Alex Hall <mehgcap@xxxxxxx>
  • To: programmingblind@xxxxxxxxxxxxx
  • Date: Sat, 07 Jun 2008 16:09:58 -0400

This is cpp, for windows xp, compiled with the Dev c++ compiler version 4.9.9.2. Pretend new lines are in the right spot; my email program forces returns where I do not want them. When the line: 

cmd=getch();
is commented out, the program works perfectly, but uncomment it and the program will not work. Oddly, pressing b twice will cause it to work once, but other than that it will not beep. Also note that the q and e commands do not work because system("exit") did not exit the program like I wanted; I am still looking for a way of doing this. 

Code for beepclock.cpp:

#include <conio.h
#include <iostream
#include <windows.h
#include <stdio.h
#include <time.h
#include <stdlib.h
using namespace std;
int main () {
int end=0;
int min=0;//stores current system minutes
int min2=0;//stores minutes as well, used to make infinite loop so beeps do not happen 
//multiple times for the same minute
int hour=0;//stores current hour
bool beeps=true;//True' is beeps enabled, 'false' is silence string cmd; 
cout<<"This program beeps once on the quarter hour,";
cout<<"\ntwice on the half, and three times at quarter of the hour,\n"; cout<<"all at 488 mhz. Each hour it beeps as many times as the hour is at 244mhz.\n"; cout<<"To silence beeps, type \"s\", and to reenable them type \"b\".\n"; 
cout<<"To exit, press either \"e\" or \"q\".\n";
while(end==0){//loop not supposed to ever end so monitoring of sys clock and beep alerts continue 
time_t now=time(NULL);//get current time in secs from 01-01-70
tm* t =localtime(&now);//ccvert to tm struct for getting minutes and hofs later 
min=t->tm_min;//get minutes from said tm struct
min2=min;//used for loop at the end of this main loop
hour=t->tm_hour;//now get hours
if(hour>12) hour-=12;//set to 12 hour, 1300=1:00
if(hour==0)hour=12;//0000=12 midnight
if(min==0&&beeps){//t is on an hour,
for(int i=0;i<hour;i++){//s beep that hour
Beep(244, 500); Sleep(500);//pause


else{//is it on a 15-minute time?
if(min==15&&beeps){//15 past the hour, beep once
Beep(488, 500);

else if(min==30&&beeps){//half past, beep twice
Beep(488, 500);
Sleep(500);
Beep(488, 500);

else if(min==45&&beeps){//quarter of, beep 3 times
Beep(488, 500);
Sleep(500);
Beep(488, 500);
Sleep(500);
Beep(488, 500);


while(min==min2){//idle in this loop until minute changes
time_t now=time(NULL);//get current time in secs from 01-01-70
tm* t =localtime(&now);//ccvert to tm struct for getting minutes
min2=t->tm_min;//get minutes again to see if this loop should end
//comment following line and prog runs great, leave it and no beeps. //I used it thinking that if no <enter> was needed then it would just wtch for input, not wait for it like it is seeming to do 
cmd=getch();//this loop is good for input
//because it is almost always running, getch gets char from kbd w/o <enter 
if(cmd=="s"){
beeps=false;
system("cls");
cout<<"Beeps disabled, type \"b\" to enable.\n";

else if(cmd=="b"){
beeps=true;
system("cls");
cout<<"Beeps enabled, type \"s\" to disable.\n";


cout<<"test";//to tell me when loop exits, for testing
} cin.get();
return false;


Have a great day,
Alex


----- Original Message -----
From: "Ken Perry" <whistler@xxxxxxxxxxxxx
To: <programmingblind@xxxxxxxxxxxxx
Date sent: Fri, 6 Jun 2008 23:42:18 -0700
Subject: RE: [BULK]  get minutes of system time as int in c++
I could not really help unless you had an example bit of source 
that doesn't
work the way you expect it to. When your writing lists like this 
you should
try to break the problem down into a simple small main that shows 
the

problems o we can help fix it.



Ken



-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex 
Hall

Sent: Friday, June 06, 2008 9:22 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: [BULK] get minutes of system time as int in c++
I will look into that. Google seems silent on the subject, but I 
have
probably not hit on the correct search terms that will uncover 
the
information. Do you know anything about getchar() and 
getch()"Getch seems
to react to a character input with no enter key, while getchar 
seems more
like cin>>. I used getch hoping for the results I am looking 
for, but,
while I can press letters of commands and have those commands 
execute
without me hitting enter, there is still a problem in the 
program; the

actual function I want will not run.



Have a great day,
Alex



----- Original Message -----
From: "Ken Perry" <whistler@xxxxxxxxxxxxx
To: <programmingblind@xxxxxxxxxxxxx
Date sent: Fri, 6 Jun 2008 21:08:24 -0700
Subject: RE: [BULK]  get minutes of system time as int in c++





Since your using Devc++ your best bet is probably the select

statement for

making it continue on.  Most of the time people use the select

statement for

socket programs and once you master it you will find making a

multi user

game easier as well.  I just thought I would point you in the

right

direction.



Ken



-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex

Hall

Sent: Friday, June 06, 2008 6:08 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: [BULK] get minutes of system time as int in c++



Ok, I have it working, thanks for your help!!! The whole time

thing makes

more sense now.  My only hang-up now (until the next one comes

along, I am

sure) is that I need it to run constantly, which it does, but I

would like

to be able to give commands.
Currently, though, it stops running and waits for my commands,

then executes

them and hits my cin >> and stops again.  Is there some sort of

cin>> that

does not make the system stop to await input?



Have a great day,
Alex



----- Original Message -----
From: "Ken Perry" <whistler@xxxxxxxxxxxxx
To: <programmingblind@xxxxxxxxxxxxx
Date sent: Fri, 6 Jun 2008 16:58:31 -0700
Subject: RE: [BULK]  get minutes of system time as int in c++





Then what you need is the tm structure and a function called

local time.

There is a simple example on this page.



http://www.cplusplus.com/reference/clibrary/ctime/localtime.html



Note they just print the full time in this string but if  you

look in your

time.h file you will find all the tm_day tm_month tm_year fields

that you

can use in the structure tm if you still have trouble just drop

me a line

and I will create another simple program.



A hint is use the tm structure that they pass to the asctime

function but

use it like bla.tm_day etc.




Ken



-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex

Hall

Sent: Friday, June 06, 2008 3:23 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: [BULK] get minutes of system time as int in c++



I have read it, but mktime and the others will not work as they

make the

entire string and all I am trying to get out of the deal is the

minutes, not

the entire thing.  I could make minutes out of the seconds like

you did, but

that would be a very large amount of minutes that I could not get

as being

either on the hour or 15, 30, or 45 minutes after the hour.

Similar with

the hour itself; I could not say which hour it is.  Is there a

way of

getting the minutes out of the tm object, defined in the object

definition

as tm_min?



Have a great day,
Alex



----- Original Message -----
From: "Ken Perry" <whistler@xxxxxxxxxxxxx
To: <programmingblind@xxxxxxxxxxxxx
Date sent: Fri, 6 Jun 2008 14:46:34 -0700
Subject: RE: [BULK]  get minutes of system time as int in c++





That is the system clock all I did was subtract the system clock

for when

the program began to the system clock after the loop.  The t1 is

the number

of seconds from that date in 1970 so with that you should be able

to use the

ctime on the page I sent you to get a printable time.  I really

think you

need to read the page I sent you .
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex

Hall

Sent: Friday, June 06, 2008 2:36 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: [BULK] get minutes of system time as int in c++



Got it.  Is there a way to apply this to tracking the system

clock instead

of the elapsed time of a program?



Have a great day,
Alex



----- Original Message -----
From: "Ken Perry" <whistler@xxxxxxxxxxxxx
To: <programmingblind@xxxxxxxxxxxxx
Date sent: Fri, 6 Jun 2008 14:13:13 -0700
Subject: RE: [BULK]  get minutes of system time as int in c++




If you look in time.h you will find that time_t when using dev

c++ is just a

long int.  And what it is, is the amount of seconds since 1970

some time.

If you read this page you will learn more.



http://rabbit.eng.miami.edu/info/functions/time.html



Why I use null is because that gives you the current time.  I

used the

modulus because that gives you the remainder in a division in

this case it

would be 5 seconds.  If you had 70 seconds it would return a

remainder of 10

instead of 5.



Ken




-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex

Hall

Sent: Friday, June 06, 2008 1:44 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: [BULK] get minutes of system time as int in c++



Thanks.  A couple questions:
1.  Exactly what is the time_t object and what can you do with

it?

2.  Why, to get seconds, do you mod by 60 yet minutes you divide

by 60?

3.  Why do you pass null to the time function, and what does that

time

function return?



Have a great day,
Alex



----- Original Message -----
From: "Ken Perry" <whistler@xxxxxxxxxxxxx
To: <programmingblind@xxxxxxxxxxxxx Date sent: Fri, 6 Jun 2008
13:25:37 -0700
Subject: RE: [BULK]  get minutes of system time as int in c++





Ok while I was waiting on your response I wrote this to check the

minutes

and seconds elapsed while running some commands.  Note I did not

use any

special libraries like a Date class that they have in most

compilers.  Here

is the most basic with out using assembler snicker.  It works for

both gcc

and visual studio's c++  Just delete the defined lines depending

on what

your using.




#ifdef VC++_COMPILER
#include <windows.h
#endif
#include <time.h
#include <iostream



using namespace std;



int main(int argc, char* argv[])
{
time_t t1 = time(NULL);



//do some tasks here
for (long  i=0;i<65;i++)
#ifdef GCC
//_sleep(1000);
#endif
#ifdef VC++_COMPILER
Sleep(1000);
#endif



time_t t2 = time(NULL);
int seconds=(t2-t1)%60;
int minutes=(t2-t1)/60;



cout <<"elapsed time = "<<minutes<< " minutes "<< seconds<< "

seconds

"<<endl;



return (0);



}





-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Ken

Perry

Sent: Friday, June 06, 2008 12:58 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: [BULK] get minutes of system time as int in c++





Oh sorry the original mail did not come to me it got junked I got

the

response and that was the one I was replying to.



Now I can tell you how to get system time all the way to the

assembler level

but it helps in knowing what c++ environment your working in

because it

makes a difference for example they have data and time classes in

Microsoft

that is some times easier to use then to actually write the code

yourself.

So tell me what compiler your using and for what operating system

and I will

give you an example.



Ken



-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex

Hall

Sent: Friday, June 06, 2008 12:34 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: [BULK] get minutes of system time as int in c++



The example did not have stdlib, and stdio was just the word, no

h.  Thanks.

The question still  stands, though: how can  I get the minutes of

the system

time? Apparently there is a time_t object, but I could not find

much on

that.



Have a great day,
Alex



----- Original Message -----
From: "Ken Perry" <whistler@xxxxxxxxxxxxx
To: <programmingblind@xxxxxxxxxxxxx Date sent: Fri, 6 Jun 2008
12:09:03 -0700
Subject: RE: [BULK]  get minutes of system time as int in c++





You should be able to compile a printf into your c++ program as

long as you

include the header for printf which is stdio and stdlib with the

h

extention.



Ken



-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex

Hall

Sent: Friday, June 06, 2008 11:04 AM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: [BULK] get minutes of system time as int in c++



Yes, just the 34 of 16:34.  The examples used printf() which is,

I believe,

a c function and stopped my program from compiling in cpp.



Have a great day,
Alex



----- Original Message -----
From: "Sean Farrow" <sean.farrow@xxxxxxxxxxxxxxxx
To: <programmingblind@xxxxxxxxxxxxx Date sent: Fri, 6 Jun 2008
18:27:38 +0100
Subject: RE: [BULK]  get minutes of system time as int in c++



Hi Alex:
Plese could you clarify what you want: if the time is 16:34, do

you just

want the 34?
What examples did you fine?
Sean.



-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex

Hall

Sent: 06 June 2008 17:50
To: programmingblind@xxxxxxxxxxxxx
Subject: [BULK] get minutes of system time as int in c++
Importance: Low



how could I go about getting the minutes, as an integer, of the

system

time using cpp? I tried to find it, but got what seemed to be

examples

in c not cpp.  Thanks.



Have a great day,
Alex
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