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How to program in C/C++

Wow, I haven't been on for a long time, anyway, does anyone know how to get started in C/C++ programming? I am looking to buy a gp2x to write applications for, and these are the other languages that it will accept, Assembler CACK Fenix Pascal GLBASIC Python Ruby Sdlbasic So what should i learn first, C++ or the other ones, an if you answer could you point me to a good book or guide?

Topic by Steamdnt    |  last reply

C programming

Hey, I would like to start learning C (yes, I want to learn C, not C++, because so then I will be able to prgram the Arduino), so I wondered if any of you guys know a good tutorial or a good book on how to learn C. Sorry my english is not good, I do not live in an english speaking country. SKC

Question by Balls of Kevlar    |  last reply

C Programming Answered

Hey, I would like to start learning C (yes, I want to learn C, not C++, because so then I will be able to prgram the Arduino), so I wondered if any of you guys know a good tutorial or a good book on how to learn C. Sorry my english is not good, I do not live in an english speaking country. SKC

Question by Balls of Kevlar    |  last reply

c compilier

Where can i get a free c compilier because ive been using djggp and its has a limited source bytes i want unlimited source bytes

Topic by cris1133    |  last reply

C++ help

Hello programers i need ur help, i need c++ program that control dc motor by 2 inputs U for Up and D for Down , so once  press U cycle duty increases by 25%  until reach max and press D for decreasing 25% until stop i hope  getting replays soon thanks all

Topic by nerofromeuro    |  last reply

C Help

I'm working on an electronic project for school, and I've been trying to learn C, I have a quick question, I think the answer is a function, but I don't know and I need an example. Basically I want something where I can break up the code into sections (I'm pretty sure it's called a function) and bring them all back together in the main() for example, lets say I want to have a function to turn on an led, then I have a different function to wait for so long, and then another function to turn it off, except I can control what LED I want to turn on/off and for how long (I want to be able to input to the function) Once again, I'm pretty sure it's called a function, I just don't know how to use them.

Topic by guyfrom7up    |  last reply


This is similar to my other topic, but I think it's worth a new topicmy company will be called electroni-C (pronounced electroni-see)I came up with cool marketing groups and product names, such as:electroni-CHIPSflavors: original (a bunch of generic boards that makes breadboarding easier, such as a 555 board, potentiometers that actually work with bread boards, a couple of mini powersupplies, jumpers, breadboard to aligator adapters, etcspicy: A lot of power stuff, like powersupplies, not just for breadboards, but for real finished projects, such as a circuit similar to mintyboost (but not the same, it'll be like a DIP package)optical (better name needs to be thought of) various LEDs, led drivers, optical sensors, and some logic to make everything useful. LED displays with integrated resistors for 5 volt (useful for less solder joints and less mess on a breadboard.caffine: motors, H-bridges, relays w/ saftey diode, servos, etc.Electroni-COOKIESNames are TBD, but here's what they are. They are called cookies because they are bigger and come in a box (oppose to a bag like electron-CHIPSdecade resistor control boxdecade capacitor control boxdecade inductor boxa big power supplyelectroni-CUSTOMIZEcustom PCB and plexi etchingelectroni-CASEcustom enclosures (basically a generic enclosure that has holes and squares cut out specifically where you want them)electroni-KITS (better name that begins with C needs to be found)H-bridge12volt regulated powersupply9volt regulated powersupply5volt regulated powersupply3.3volt regulated powersupplyR/C equipmentpulsing music LEDsthe resonator (just you wait!)lucid dream machinethe diode calculator (using thousands of diodes and switches for input, you can make a calculator, plus some resistors for the LED display)I will also carry some basic components such as resistors, LEDs, capacitors, etc..suggestions are appreciated!EDIT: website is in development.. uhhh.. by mehere's the site, all pictures were done by meI would like my own URL, but eh, wacha gunna do for free

Topic by guyfrom7up    |  last reply

C++ programming...?

Hi all. i know a bit of c++. And I want to make a simple program that calculates Pi. Now, I want it to have the user input the number of decimal point thingies... and let it do the rest. BUT, it must be stoppable no matter how HUGE a number the put in... and im 12, so please try to make it as easy as possible. THANKS!

Question by sci4me    |  last reply

C++ audio

Where can I learn about how to program audio in C++? I already know many of the the basics of C++, but I really want to get into audio programming.

Topic by 8bit  

C++ Keylogger

Im posting this forum to find out what you people think about posting a instructable about a kelogger..... any ideas?

Topic by B.F.L.M    |  last reply


Hi, I'm making plans for a remote control car from scratch, and have a few questions. Are hobby motors able to go backwards, how do you control that? Any ideas on making a wireless usb cord for a webcam? Do you know of any small things (like motors) that could move a switch remotely for the steering mechanism? Any other ideas?

Topic by Weissensteinburg    |  last reply

How to learn C and C on a Mac? Answered

Is there any other compiler other than xCode because i lost my starting disk. or is there a way to download xcode?

Question by mac_is_awesome    |  last reply

whats the difference between C++ and C#?

Thats C plus plus and C sharp. my computer science teacher asked us and im just curious

Question by 2fst4u    |  last reply

C&C RA2 lags in Linux

I have C&C; Red Alert2 installed via WINE, and it played fine but suddenly began lagging unbelievably after a LAN match.

Question by S1ko_shadoe    |  last reply

how to generate a signal (pulse) with c# using usb port

For my application , I need to generate a signal wich contains 2 pulses , 1 of 150 ms and the other of 427 ms , seperated with a duration of X ms , using the usb port of my computer and c#

Question by isalhi    |  last reply

hi i'm new, i wana code arduino led interface in C#?anyone hlp plzzz?

I want to code ov arduino in C#, i dn have idea about C#!! i need help urgntly :(

Question by s_mehak    |  last reply

Atmel ICE basic?

Hey I got Atmel ICE basic, 6 pin wire and atmega1248. I try to sent  program code, but there comes error message. How I should connect  pins?

Question by mattilaniko    |  last reply

C# button on a form Answered

I'm trying to make a form i have the form and the about box made i just need to assign the about box to the about button on the form does anybody know how to do that

Question by hightekrednek2396    |  last reply

r/c and arduino communications

How do I check to see if my values for my reciever match the values in the r/c lawnmower code. It says if they don't to change them. But, I don't know how to check them.

Topic by mfm5024    |  last reply

Things to do with C Batteries?

For a while my wife had to use this special medical machine that ran on c batteries.  every week the hospital would send us a box batteries even tho they were lasting about a month.  We kept telling them that we didn't need more but they said that they were required to send them anyway.  Now that she's off the machine I have all these batteries and nothing that uses them.  Everything that i've found on Amazon is very expensive.    I'm into woodworking and no absolutely nothing about electrical stuff or I'd design something myself.    anybody have any cool projects using c batteries? as one project idea, I have several of these lantern flashlights that run on d's.  it would be cool to convert those to run on c's.

Topic by dimtick    |  last reply

c++ code hElp?

This is the code for mobile operated robot found from this site can somebody explain this code i didnt understand  the line which is Italic and Bold like this (DDRD=0xff;  DDRB=0×00) somebody plz tell me what the lines are CODE /* DTMF Controlled Robot PORTD pin 0,1,2,3 goes to motor driver l293d PORTB pin 0,1,2,3 is connected to output of CM8870 DTMF decoder IC */ #include #include int main(void) { DDRD=0xff; DDRB=0×00; while(1) { switch(PINB&0b00001111) { case 0b0010://Key 2 { PORTD=0x0A ;      //1010 both motor front continue; } case 0b0100://Key 4 { PORTD=0×02;    //0010 right motor front continue; } case 0b0101://Key 5 { PORTD=0x0F;//1111 SUDDEN STOP continue; } case 0b0110://Key 6 { PORTD=0×08;  //1000 left motor front continue; } case 0b1000://Key 8 { PORTD=0×05; continue; } default: continue; } }//end of switch return 0; } // // // //

Question by agent555  

r/c commuication with the arduino mega

I was wondering if anybody knows what pins have to be used on the arduino mega to get the r/c signal converted so that i can drive a store bought motor driver. I am lost  on the wire connections. Thanks for the help

Topic by mfm5024    |  last reply

How Do I begin to program in c without a microcontroller

How would i get started writing programs in C/C++ on the computer for free. I would like to be able to write simple games.

Topic by sotsirh194    |  last reply

how do you test for vitamin C in orange juice using cornstarch and iodine??

Helping my son with a science fair project

Question by ranchosmith    |  last reply

HELP IDEAS for Mini A/C Unit for Truck

This is an idea that has been tried before with other type equipment & applications. However I think that I have found a way to limit the cost & over size of the application for the use intended. The rubb is that I need help with the fabrication. So I am hoping that the brain power will rally to help in a proto-type or test model of this idea.THE IDEA: A mini A/C unit to keep a vehicle cool for short periods of time 1-2 hours.Why needed?? I own a Private Investigation Agency and have very expensive electronic equipment inside sensitive to the high heat in south Texas during the summer.Equipment on hand for the idea:A. Small Cooler & HEater unit that can be found @ most Walmart, Walgreens, ect... Size 12"x 10" x 6"Input: 100-240VAC 1.2 A 40 watt Output 12 volt 4.0 A (looks like a tall showbox with a single hinge that opens like a center console-armrest-glovebox in a truck or van. Picture below...B. A DC/AC convertor also sold at same stores. The unit is very small but will power the unit very easy. 12 volt 5 A 100 watt, 4" x 3" x 3/4"C. a zeus sealed 12 volt battery 4-5 AH with the PWR use of cooler.D. VArious size small electric fans to be used a blower fans.E. PVC or duct work for the application.F. Optional Solar Cell for battery recharge to be mounted on roof of vehicle.I am sorry if my post is inapropiate for this forum or if I have used this post wrong for my purpose. This is my first time to post anything...If there is anything I can do to help with the concept please let me know.I will try and add Pic's of the parts later.THANKS!!!PS: total cost of everything brand new was less than $50.00

Topic by leebarret    |  last reply

microcontroller 8051 seriel interfacing with pc

I want coding of microcontroller seriel interfacing to pc in assemble and c both

Question by f_siddiqui    |  last reply

arrays base address is 1000?.array is a[5][4]..then wat is the correct address of a[4][3]? ?

It's a question on C programming.  Please explain the answer.

Question by sanlee1990    |  last reply

I need some help please ^^

Hello everyone. i have one project to control the rotation 3 phase motor with visual C. But i don't know how to do that. anyone who know tell me how to do that please :)

Topic by pfromthailand    |  last reply

How can I keep my dog cool in a car in the summer? Answered

Opening windows in 90 degree heat isn't enough.  Is there a portable window a/c, or equivalent, available?

Question by cgmox3410    |  last reply

Why won't this compile? Answered

I am going by a book to teach me C programming, and I have entered the program exactly, but my compiler says there's an error.  I know it is not an issue with the compiler/IDE because I tested it in another compiler and had the same result. Here is the code: #include #include int main (void) {     char buffer[256];     printf("Enter your name and press :\n");     fgets( buffer );     printf("\nYour name has %d characters and spaces!", strlen(buffer));     return 0; } It says on line 8 (the one with fgets) that there are too few arguments, yet the book says it should compile correctly.  The book is Sams Teach Yourself C Programming, and it is in lesson 2 exercise 5. Thank you for any help!

Question by StarscreamClone    |  last reply

I like to use my air condition free how many solar panel will need?

I want to make my home project.

Question    |  last reply

is it possible to make a rc fan out of a rc car? and if so how? Answered

 i have a ton of rc cars but most either don't work or body,wheels, or something else doesn't work so i wanted to make a rc fan out of them.

Question by nbagf    |  last reply

Object-oriented programming in Unity?

Hi people, My name is Cynthia and I need some help with Object-oriented programming. I have a project for school where I'am making a 2D platformer game with Unity. Where I have to make a base class and two child classes that inherits from it. I have to work with constructors, properties, etc . The problem is I kinda know what the constructors, properties etc do but I don't know how to put them together to make a game. Can someone help me, push me into the right direction cause now I don't know where to begin with. What I like to make is a Enemy base class with two sub classes (enemy 1 and enemy 2) or base class Item (sort of coins or power ups) with two sub classes (item 1 and item 2). If there is someone who can help I would be so grateful. (I program in C# and the game must be made in Unity). Sorry if this is not the right place for asking such a thing. Thanks Cynni

Question by Cynni    |  last reply

Is there a simple way to test the air flow/pressure inside my HVAC fan housing?

Is there a simple way to test the air flow/pressure inside my HVAC fan housing? Perhaps some kinda guage I can attach to the blower unit of my fan box for the HVAC? Why? I'd like to test with new filter and then old, to determine when it needs changing. so, I'm looking for a simple, cheep differential pressure gauge or some means to tell if the filter is dirty and thus constricting the flow through the fan unit.

Question by gereckes    |  last reply

Arduino coding problem

I'm creating a PIR Sensor Alarm with Arduino. I'm using Arduino Uno, PIR Sensor, Breadboard, LED, Buzzer, TTL JPEG Camera, Arduino shield and SD Card. I already have the code to make my project work, but I still can't figure out the right code for the Camera.. so I need some help with that..   here's my code: int ledPin = 13;                // choose the pin for the LED int inputPin = 2;               // choose the input pin (for PIR sensor) int pirState = LOW;             // we start, assuming no motion detected int val = 0;                    // variable for reading the pin status int pinSpeaker = 10;           //Set up a speaker on a PWM pin (digital 9, 10, or 11) void setup() {   pinMode(ledPin, OUTPUT);      // declare LED as output   pinMode(inputPin, INPUT);     // declare sensor as input   pinMode(pinSpeaker, OUTPUT);   Serial.begin(9600); } void loop(){   val = digitalRead(inputPin);  // read input value   if (val == HIGH) {            // check if the input is HIGH     digitalWrite(ledPin, HIGH);  // turn LED ON     playTone(300, 160);     delay(150);         if (pirState == LOW) {       // we have just turned on       Serial.println("Motion detected!");       // We only want to print on the output change, not state       pirState = HIGH;     }   } else {       digitalWrite(ledPin, LOW); // turn LED OFF       playTone(0, 0);       delay(300);          if (pirState == HIGH){       // we have just turned of       Serial.println("Motion ended!");       // We only want to print on the output change, not state       pirState = LOW;     }   } } // duration in mSecs, frequency in hertz void playTone(long duration, int freq) {     duration *= 1000;     int period = (1.0 / freq) * 1000000;     long elapsed_time = 0;     while (elapsed_time < duration) {         digitalWrite(pinSpeaker,HIGH);         delayMicroseconds(period / 2);         digitalWrite(pinSpeaker, LOW);         delayMicroseconds(period / 2);         elapsed_time += (period);     } } Thanks

Topic by fhussein1    |  last reply

How to reset arduino after pressing the pushbutton 16 times?

Good afternoon, I'm trying to reset my Arduino after pressing the pushbutton 16 times. What I'm currently experiencing is that it is not resetting. I'm trying to achieve this using the StateChangeDetection example. Could anyone give me tips on how to achieve this? I'm working on this using an Multi Function Shield or MFS. My code is: // this constant won't change: const int  buttonPin = A1;    // the pin that the pushbutton is attached to const int ledPin = 13;       // the pin that the LED is attached to // Variables will change: int buttonPushCounter = 0;   // counter for the number of button presses int buttonState = 0;         // current state of the button int lastButtonState = 0;     // previous state of the button int count = 0; void setup() {   // initialize the button pin as a input:   pinMode(buttonPin, INPUT);   // initialize the LED as an output:   pinMode(ledPin, OUTPUT);   // initialize serial communication:   Serial.begin(9600); } void loop() {   // read the pushbutton input pin:   buttonState = !digitalRead(buttonPin);   // compare the buttonState to its previous state   if (buttonState != lastButtonState) {     // if the state has changed, increment the counter     if (buttonState == LOW) {       // if the current state is HIGH then the button went from off to on:       buttonPushCounter++;       Serial.println("on");       Serial.print("number of button pushes: ");       Serial.println(buttonPushCounter);     } else {       // if the current state is LOW then the button went from on to off:       Serial.println("off");     }     // Delay a little bit to avoid bouncing     delay(50);   }   // save the current state as the last state, for next time through the loop   lastButtonState = buttonState;   // read the state of the pushbutton value:   buttonState = digitalRead(buttonPin); //Source: if (buttonState == HIGH) {        // turn LED on:       digitalWrite(ledPin, HIGH);     count++;               // add 1 to the count     if (count >= 8) {       count = 0;     }   }   else {     // turn LED off:     digitalWrite(ledPin, LOW);   } }

Question by DanielB804    |  last reply

Progress Bar in C#?

I am making a C# program that loads a web page.  I would like to make a progress bar on the status bar to tell the web page's loading progress.  Any Help? Thanks in advance.

Question by drmjj55    |  last reply

R/C Car

Hi, I had this r/c car, but I had lost the top, can anyone help vme figure out what to do with it? how can I make a top with plastic? And sorry, but the pics were a little blurry, (the camera was out of focus) but you can still see the basic shape

Topic by zack247    |  last reply

R/C Sailboat

I want to make a R/C sailboat, so far I have 4x32x1/4 inch balsa wood planks and they should last me the entire project. This weekend I'm going to visit a hobby store and get: waterproof wood glue, waterproofer for the wood. Then go to target and get a rotary tool. The boat will be 3 inches tall with a 1 inch keel (keeps the boat from tipping) 5 inches wide and 15 inches tall. I will get a cheap multi directional R/C car and use the steering mechanism to move the rudder and the drive motor to turn the sail. Once I make the boat I'll fill the gaps with wood paste and water proof everything hopefuly with a silicon based sealant. Any tips or flaws with my plans, please see the attached sketch.

Topic by acer73    |  last reply

R/C planes

Have any of you flown any R/C planes gas or electric?

Topic by Superninjacamper941    |  last reply

K'Nex C' Bows

Hey I have a question... what you think 'bout my C' Bow? I'll put up an Instructable for it soon! =)

Topic by ThaJuzz    |  last reply

C voice lessons?

Hiya! I just got a new Sansa fuze for Xmas (8 gigs, Installed Rockbox, IT ROCKS!!!) and I wana start learning C. I actually already started, But I best process info when I hear it. Where can I find simple English (Russian or Hebrew also welcome) lessons of the C programming language? I have learned the basics of both C# and VB 5.0, So it don't have to be THAT easy... any help?

Question by netbus  

USB type C

Greetings, USB type c please? So I have spent alot of time researching different ways to light small ornament designs. I have considered EL lighting and LED, yet, in order for these lighting techniques to work sufficiently, you need 12v of power. There are Instructables to power these lightning methods per USB, however this ofcourse only provides the lightning with 5v. What I find quite surprising however is that there are no tutorials whatsoever with the new usb type: USB-C. Since USB-C can apparently provide 20v I wonder why there is little to no information available concerning these subjects. Are there technical limitations I dont know about? If not: would anyone please help me make usb-c powered led strips ^^

Topic by zeepjes    |  last reply

PIC C compiler

I'm planning on getting started with PICs this christmas. I've aquiered everything i need to get started, and done some reading on assembler language. But I have yet to find any free C compilers for the PIC microcontroller. Could some experienced PIC users please give me some pointers?

Topic by chr    |  last reply

A/C Wireing Problem

I need a A/C 120v wireing diagram that show the best way to wire a Router, Blower & Saw so would run as follows. (1)Router & Blower at the same time. (2)Saw & Blower at the same time. (3)All off at the same time,can this be done using a Double Pole Throw Switch ? if so PLEASE send wireing diagram. :o)

Topic by kngokngo    |  last reply

Is There Any C++ Client For Mac? Answered

Aside from dashcode, is there any c++ client similar to visual c++ studio 2008 express for mac osx

Question by robots199    |  last reply

What is the best book for learning Python and C++?

I want to learn python and C++ but I want a couple of good books to learn those with. What books do I need if I want to start?

Question by nerd7473    |  last reply

free example Assembler and C programs. Examples

Ftp:// username: ian password: blank, no password required.

Topic by turnbui