51,593 Topics
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| | I need help with this assignment that I have to do. I am new to C++ programming and I do now know how to start this lab. Here is the instruction to the lab..please help.. COMP-122 Lab 6 Grade Arrays Objectives: • Use an organized, modular approach to develop programs, …  |
 | Hi. I using this Thread "Serial port communication using C++ = "http://www.daniweb.com/forums/thread56329.html" and I change it for solved the some error in program. This is my source code: serial.h #[CODE]define FC_DTRDSR 0x01 #define FC_RTSCTS 0x02 #define FC_XONXOFF 0x04 #include <stdio.h> #include <time.h> #define VC_EXTRALEAN #include <string.h> #define ASCII_BEL 0x07 #define … |
| | [CODE]void CScreenCoordDlg::OnMouseMove(UINT nFlags, CPoint p) { GetCursorPos(&p); m_ValX = p.x; m_ValY = p.y; UpdateData(FALSE); }[/CODE] I used the following code to get the mouse coordinates on mouse move. But the problem is as soon as the mouse moves out of the dialog window it stops updating the mouse coordinates. Although … |
| | I have had no previous programming experience and want to start learning C++. T was hoping if you could reccomend a good book. P.S. I've been thinking about [I]C++ Primer Plus[/I]. |
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| | im curious as to why when i make a dll win 32 project in visual studio 2010, it doesnt show my dllmain function so i can work off that and leaves me with an blank .cpp.(and no i didnt click empty project). How can i fix this? -thx  |
| | i have a program that would display the productName,productPrice,productCode. each is a separate array. the program would prompt user to add,delete,or search a productName,productPrice,productCode. here's what i tried to do: [CODE]string productName[100]={"milk","beef"}; int productPrice[100]={10,11}; string productCode[100]={"a1","a2"}; int x,y,z; char choice; string search,name,price,code; cout<<"what do you want to do?"; <<"[S]earch."; <<"[A]dd."; … |
| | I just got a program that does forward substitution. It is working fine but I would like to make it so the user can enter size of both 2D n x n array and a n x 1 array and then be able to enter the elements of the arrays. … |
| | I'm trying to make a program that will scan the screen for a certain color. i tried to use GetPixel(), but it is too slow. someone else recommended i use GetDIBits(). Can anyone explain or give an example source on how to scan the screen for a certain color with … |
 | Hey everyone. I'm brand new to C++ and programming in general and this is my first post here. I've found lots of good info here and these forums helped me a lot last semester. I've got a problem here though. This is a small bit of code I had to … |
| | Hi, I have an assignment where i'm supposed to read from a Input File and save it to an output file. The final expression should only contain alphanumeric characters. The code that I have so far gives me both symbols and alphanumeric characters. I was wondering if anyone saw anything … |
 | The function Generate_And_Display_Bill() has no formal parameters and returns a variable of type float. The function generates a random number between $0.01 and $99.99 and returns the value to main(). This is what I've created so far in my function declaration; [CODE]#include <iostream> #include <ctime> float Generate_And_Display_Bill() { float Random_Bill; … |
| | I am using the CodeLite IDE. I compiled the following program using CodeLite (It is a C++ program): [CODE]#include <iostream.h> int main() { cout << "Hello World\n"; return (0); }[/CODE] It returns this message: g++ -c "/home/keagan/.coding-work/Hello/printamessage.cc" -g -o ./Debug/printamessage.o "-I." "-I." /home/keagan/.coding-work/Hello/printamessage.cc:1:23: error: iostream.h: No such file or directory … |
 | [B]QUESTION 1[/B] In this line of code, I get that it's using the date/time to seed the code for a more random number each time, I'm just wondering what the < > operators are doing? [CODE]srand(static_cast<unsigned int>(time(0))); [/CODE] I realize, they're making time into an unsigned int, but why not …  |
| | All, I’m new to C++ and trying to figure out the best way to do a multidimensional array of pointers to a class. The code I am presenting demonstrates several questions I had and am hoping to get some help with each question. The basic idea is to create myMatrix, … |
 | I have a sockets projects using tcp/ip and it is structured like this: [code] class Socket { int desc; Socket(); // create socket here }: class TCPSocket: public Socket { public: int send(); int recv(); }; class ClientSocket: public TCPSocket { public: void connect(); }; class ServerSocket: public Socket { … |
| | In the book I'm studying we are given a function to make rand() work for numbers that are smaller that RAND_MAX [CODE] int nrand(int n){ if(n <= 0 || n > RAND_MAX) throw domain_error("Argument to nrand is out-of-range"); const int bucket_size = RAND_MAX/n; int r; do r = rand()/bucket_size; while(r … |
| | I have a program that I've written...basically the problem starts when I reach the condition to hit the following block: [CODE] status = myPubSubSubscribe.Receive(fsReceivedTopic, myBufferSubscribe, myHeader, 0); if (status == PS_ENGINE_UNAVAIL) { printf("Unable to connect to the pubsub engine: %s\n", PSPubSub::Status2String(status)); myBufferPublish.FreeBuffer(); myBufferPublish.~PSBuffer(); myPubSubPublish.~PSPubSub(); myBufferSubscribe.~PSBuffer(); myPubSubSubscribe.~PSPubSub(); return; } [/CODE] In … |
| | Hi I am New to C# i Am trying to create a grade book form but I cannot build successfully because of the following error. [COLOR="Red"]The name 'InitializeComponent' does not exist in the current context [/COLOR] [code] // Fig. 19.7: GradeBook.cs // A reusable Windows Form for the examples in … |
| | [CODE]// ---------------------------------------------- // Name: William Rennie // Program: // Description: // ---------------------------------------------- #include <iostream> #include <cstdlib> #include <stdio.h> #include <string.h> using namespace std; // ----------- Function definitions ------------- void printTitle(int gamenumber){ gamenumber++; cout<<"***Word guessing game round "<<gamenumber;} bool checkWord(char word[],char guess[]){ int i; int x=strcmp(word,guess); if (x==0){return true;} else return …  |
 | Working with large int numbers. Broken up as char for each digit, total of 3 arrays, n1, n2, and sum. I have everything completed, the math works fine, the arrays work fine, the shuffling to the right side of the array works fine. I just have two issues, that both … |
 | I need to generate a core file for a crashing process and then read it using dbx - can anyone help me with this? |
| | I'm reading about two-dimensional and multi-dimensional arrays at the moment in order to better organize user input. I'm trying to create a function that can store a card player's hand. At the moment I'm just brainstorming how it would look and writing out some notes to myself to organize it …  |
 | Hey folks, just a quick question i can't seem to find the answer to. If i overwrite a container with a pointer in it, does the pointer and therefore the object it points to still exist, and would that be considered a bad handling of memory. For instance. I have … |
 | Hi, Why I get access violation in this code ? [code] char *arr[ 5 ]; for( int i = 0; i < 5; i++ ) cin >> arr[ i ]; [/code] but not in this : [code] char *arr[ 5 ]; char list[ 5 ][ 30 ]; for( int i …  |
| | Okay here is go this is my first time posting to this website and I hope I can get this all right for you all. I have stated this program and I gt know errors but the program will not run past my first cin cout statements? Does anyone see … |
| | Hello Using : [CODE] cout << "enter 5 letter"; getline(cin, letter); [/CODE] executes fine but when running PC- Lint: getline(cin, expectedLabel): error 534: (Warning -- Ignoring return value of function 'std::getline(std::basic_istream<char,std::char_traits<char>> &, std::basic_string<char,std::char_traits<char>,std::allocator<char>> &)' error 830: (Info -- Location cited in prior message) I was wondering if anyone could tell … |
 | Hello friends, I am having a trouble with dosbox 0.72. I opened turbo c++ using dosbox and tried a program. But it throws an error 'unable to create hello.obj'. my program [CODE]#include<iostream.h> #include<conio.h> void main() { cout<<"hello"; }[/CODE] I gave this while opening turbo c++ in dosbox... Z:\>mount c d:\turboc3\ … |
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| | I have a program which i need to run with 2 input files 1 is no problem but i have no idea where to start with having it run with 2 anyone have any ideas? basically heres how it goes 1)have the program run with data01.dat 2)outputs results to output.dat … |
| | How to write this problem.. a. Show the customer the different breakfast items offered by the HIFI's restaurant. b. Allow the customer to select more than one item from menu c. Calculate and print the bill to the customer Plain Egg $2.50 Bacon and Egg $3.45 Muffin $2.20 French Toast … |
| | I need a lot of help with this program: I know this is a homework problem but I am really struggling with it. This program requires you to input information about rickshaw taxi fares. The ODUSPORTS is a student powered on-campus rickshaw transportation system. Upon departure, a ticket is created …  |
| | [CODE] #include<iostream> #include<fstream> #include<string> using namespace std; int main() { cout<<"Start entering your text\n Put a * to terminate\n"; ofstream fout; fout.open("1818.txt"); int i=0; char c; while((c=getchar())!='*') { fout<<c; } fout.close(); ifstream fin; fin.open("1818.txt"); int word=1; int line=0; int vowels=0; while(fin) { fin.get(c); if(c==' ') word++; else if(c=='\n') line++; else … |
| | error C2784: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_istream<_Elem,_Traits> &' from 'std::ifstream' 1> C:\Program Files\Microsoft Visual Studio 9.0\VC\include\string(527) : see declaration of 'std::getline' [CODE]void read() { Inventory items[100]; string line; int i=0; ifstream inventdata; inventdata.open("Inventory.dat", ios::in); if( !inventdata ) { cout << "ERROR: Unable to …  |
| | so cplusplus.com is losing my connection and won't email back yada yada, so untill thats resolved I'm transferring my learning to this site, now for the program. any way its just a simple "choose the math operation program" then it performs that operation, but I wanted to add a part … |
| | Hi all, I kind of new in C++ and my assignment require me to do some encryption on data. Found the AES file online can anyhow guide me how to use it ? Because when i compile the test.cpp it keep giving me exception not match error. And btw how … |
| | The question is: A file contains a list of names in the form: Jones, Frederick M Brennan, Claire Your program should alphabetize the list. Use the C++ string class. Also, extract names from the input stream with getline(). What i know so far: main() should declare a char array and … |
| | Hi, I am writing this template Array class. I am trying out some different functions, anything I can think of to implement. I have written an Add function as follows: [CODE] /**Add function - adds an element at the top of the stack**/ //creates new Array 1 larger //sets position … |
| | I'm a beginner c++ programmer. I use Win XP and CodeBlocks. I'm trying to make a pong game, I already have the controls programmed, but I need a method to do the following: Check for user input, if they don't input for x milliseconds, then continue with the loop so … |
| | ok so what does this do.. 1.) read the text file(most likely a c++ code in text form) line by line and display it line by line... 2.) (as the title says) check for syntax errors. ( only minor ones like missing ";" or a lack of closing braces) soooo..... … |
| | I am currently working on a Win32 program where I have a picture. Depending where they click on the picture, something will happen.I just loaded the picture on the window, but how do I make it so that my program can tell when a certain area on the picture on … |
| | im curious as to if there is a benefit to the coder and/or reader in assigning a variable name in a class functions prototype...for example class book { private: //blah public: book( int, string, double); } vs. class book { private: //blah public: book( int data1, string name1, double data2); … |
| | I'm trying to read this input from a text file but whenever I try to output it, it shows up as 00000. Input: IBM 100 93.2 98.6 MER 200 67.2 43.89 QQQ 300 78.9 70.0 C 200 35.78 50.02 CSCO 400 45.67 57.23 This is what I have so far: … |
| | How can you do this in c++? |
| | The program asks the user to provide from 1 to 6, inclusive, numbers between 1 and 59, inclusive, as their lotto numbers. The lotto program will then use the random number generator to provide the same number of numbers in the same range. Check to see how many of the … |
| | I am working on a program that will scan the screen for a certain color. I made a code that will scan, but it is too slow. Is there anything else i can use instead of GetPixel()? Or is any other way I can speed this up. If it helps … |
| | This is my basic set up as of right now for how my server will handle new connections to a listening socket. I created a simple console app to mimic a connecting client so I can do some testing. All works fine, and I can connect, but I debugged my … |
| | I'm fourteen trying this on my own for the first time. Yes it is for my junior high math class. I am having a few issues.. I have cleared many of my issues up after I found I had left out a lot of {{ type things.. Any help would … |
| | I am asking on multiple forums because I am desperate! Hi, firstly I would just like to say that I am not a C++ programmer and I never intend to be - I am an SQL, javascript and PHP developer. For a module at University I have to alter a … |
| | Hey all! Homework help again...except this time not in the way you think lol...I finished all my problems and realized there's a problem in my makefile which I need in order to submit Here's the original make file that our professor gave us [CODE] CC = gcc JVC = javac …  |
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