51,593 Topics
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| | I apologize up front; I'm a VB Programmer trying to pick up C++. I have a very simple program that takes a string input from the user. How can I look at a specific character in that string? VB has the Left(), Right(), and Mid() Functions. Is there something similar …  |
 | i have a vector initialized without a size. vector<int> Vector1; i initialized the first 5 values via .push_back() and i am supposed to do this next: Externally initialize(using a single cin statement) the next four items to: 50 65 77 32760 This doesn't seem to work: cout << "Enter these … |
| | Can anyone help me with this snippet of code? I have 2 files, a random record containing random records in it and an index file, which contains the binary tree of the random record. Here is what the index file looks like: 123456720 4 -1 -1 123456708 6 -1 -1 … |
| | This program is calculating and displaying the average of 3 groups of numbers in output file. Data is arranged in file so each group of numbers is preceded by number of data items in each group. It works for 2nd & 3rd group but calculation for 1st group is wrong. … |
| | Hello, I am studying C++ at Uni and my coding is not very strong. More to the point I am having issues with my header taking in this string. The code works in a linear non object oriented code but as I am new to data abstraction I as mentioned … |
| | Hello, I was hoping that someone could help me with this question. We received an extra credit queston which completely bombed on. That wasnt the problem, the problem was that I still cannot explain the questions below and since this was extra credit the professor would not give us the … |
| | I got this assignment to do, but i cant so it, i have tried everything i know in C++ programming and its not working. Can someone help me please. Write a Graphical User Interface program that simulates the activities of a vending machine. The program should allow for full user …  |
| | Well I got the password code right, I think. I have a few problems 1) it wont close properly 2) Can someone point me in the right direction to find a tutorial that teach me how to only let the user have 34 tries before it close and also to … |
| | So I need to write a program that requires getting data from an input file (first name, last name, Student ID, and 4 test grades) and create an outputfil with the first and last names and ID, and then the average of the grades and the final letter grade - … |
| | How can I use "cin" to allow entry of an enum type in C++? My code is as follows: enum Cards {TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN, JACK, QUEEN, KING, ACE}; Cards hand1 = ACE, hand2 = ACE; cout<<"Player#1 - Pick a card (2 - A): "; … |
| | Hi all, I have a C project consisting of five files as follows: main.c file1.c file1.h file2.c file2.h I have defined an array in file [B]file1.h[/B] as follows: [CODE]static struct prnc keys[MAXP];[/CODE] the array was populated in file [B]file1.c[/B] Now I need to use the contents of this array again … |
| | Hello ladies and gents, Ive got this example of a program that I tried out wich shows some special possibilities to use new. [code] #include <iostream> using namespace std; int main() { int a[100]= {0}; for (int i = 0; i < 100; ++i) a[i] = 100 * i; int … |
| | What's the difference between a set and a map? (As described below on cppreference) Set: The C++ Set is an associative container that contains a sorted set of unique objects. Map: C++ Maps are sorted associative containers that contain unique key/value pairs. I'm having trouble finding the distinction. |
| | i am after help with c++ builder any takers i need info on the registry adding and changing keys thanks in aticipation Robert |
| | I've got to implement Prolog in C++ for an assignment. I'm very new to C++, it's a little daunting. Also, I have no idea of where to start. Can someone point me to some basic algorithm and/or some resources online? |
| | Hi, I've been experimenting with STL on solaris with the 7.0 sun compiler. I am able to write programs using string, map, vector, list, etc. however, I am trying to use hash_map and can't get the most basic (ie hash_map<string,string> h; ) to compile. It appears that hash_map is not … |
| | I want to write a program.This program is following: The two text file named file1and file2 each hold number of English sentences.A c++ program is required to carry out the following operations. a.)Give a wrod ,it lists how many times that word appears in file1 and file2. b.)list all the … |
| | Hello, I want to know how to use xml and c#. Can someone give me and example of how to do this or link me to a good tutorial. Thanks in advance |
| | I am trying to close this file so that it stops reading the array twice. i have placed it in different places but i does not seem to work, please look at my code and advise me on were to place the infile.close() Thanks in advance [code]#include <iostream> #include <fstream> …  |
| | I kind of know the definition through studying Java.] Inheritance is like when a child class inherits some value, object, or function from a parent class, right? I need an example of how its done in C++ |
| | Okay, this is driving me insane... The compiler error I'm getting says I am trying to convert a void to an account? I don't see why it thinks I'm trying to do that... Maybe you guys can help me out. [CODE] void get_accounts(account a[], int n); int add_customer(account a[], int … |
| | I need help. I keep getting a Bus Error when I run my program and I've narrowed down where it occurs to the following code fragment. px0c0 and px0c1 are type double pointers and count_x0c0[m] and countc0 are integers. Can anyone see why this code would be giving me a … |
| | I'm wanting the program to read a line out of file. I wish c++ had .eoln()! I get: test.cpp:10: no match for `std::ifstream& != char' operator obviously because I'm comparing the wrong data types. [QUOTE] #include <iostream> #include <fstream> using namespace std; int main () { ifstream infile("test_file.txt"); while(infile!='\n' && … |
| | Can someone help me to make my program sort according to the average gallons used per car I keep geting 30 - 40 error when i try to compile it. Also my files do exist. [CODE]#include <fstream> #include <iostream> #include <iomanip> using namespace std; const int MAXCARS = 12; float … |
| | I'm kind of lost. I'm trying to find the mode value in the list. All list are stroed in array. Anyone has any idea? |
| | i cant figure this out, here is what im suppose to do Create a text file containing the pertinent information for the following table(not the identification row): [code]Employee No. Department Pay Rate Exempt Hours Worked 101 41 8.11 Y 49 722 32 7.22 N 40 1273 23 5.43 Y 39 … |
| | hello am in need of some help on question 7 and 11, if someone has time please also try question 15. i really don't have any idea how to do the following question, and i need to have this assignment in soon. could you please try. thank you (7) allows … |
| | I have this code that I started on but cant seem to finish it. i have to create an file and put the outcomes in it. I cant seem to figure it out. can soemone please help. thanks, john [code] #include <iostream> #include <fstream> #include <cstdlib> #include <ctime> using std::cout; … |
| | Anybody can help to explain why "m_line.replace(idx, m_search.size(), replace);" doesn't compile in cygwin and how to change it? Thanks. [code] using namespace std; int main(int argc, char *argv[]) { assert(argc==3 && "Usage: <searchstring> replacestring> to process stdin"); string m_line; string m_search(argv[1]); string m_replace(argv[2]); assert(m_search!=m_replace); while(getline(cin, m_line)) { while(true) { string::size_type … |
| | i'm having a trouble getting this right .. Write a program to calculate parking fee for customers who park their vehicles in a parking lot when the following information is given: The time the vehicle entered the lot (in 24-hour format, without a colon, such as 1645) The time the …  |
 | Hi, I was wondering if there is a way to control hardware in C++, such as opening and closing a CD drive. Thanks in advanced, C++ |
| | im includeing [code] #include <windows.h> // Header File For Windows #include <gl\gl.h> // Header File For The OpenGL32 Library #include <gl\glu.h> // Header File For The GLu32 Library #include <gl\glaux.h> [/code] how do i link this(the opengl headers) in the cmd console window im using mingw and g++ any ideas? |
| | Hi. I want to escape any special characters in the input field before inserting the data into mysql tables in C++. Here is how I am using this function [QUOTE]// Escaping special characters in the Subject field char * S = new char[strlen(m_headerSubject.c_str())*3 +1]; mysql_real_escape_string(conn, S, m_headerSubject.c_str(), m_headerSubject.length()); m_headerSubject = … |
| | I got most of this too work, i talked to my teacher and he gave me some hints but i cannot get it full. The idea is to get the program to count specifically how many "a"'s there continueing through all the 26 letters. I cannot figure out exactly out … |
| | I have forgotten how to perform this function. I need to display only the records that meet the following criteria: I only want to show records that have a quantity greater than 100. Can someone help? This is an MFC project using an ODBC database: [code]void CInventoryView::OnRecordQuantity() { // TODO: …  |
| | Right now I'm reading up on the chapter "File Processing" to help me quench my thirst for putting C++ to USE in the real world. Seems to be the most powerful subject so far. Can you please clarify the difference between Sequential Access Files and Random Access Files? What are … |
| | I can't figure out how to write a program that will work over a network of computers? How do you get a program on one computer to carry out instructions that will affect a program on another computer or computers? Does anybody have any ideas? |
| | I am trying to push a pointer into a vector, but my compiler gives me the error: request for member 'Add_Object' in theContainer, which is of non-agregate type 'Container(X)' Please tell me what I am doing wrong. Here is my code: [CODE] #include <vector.h> #include <iostream> class Object { private: … |
| | Hello, I recently programed a hangman game, However it as flaws with are buggin me! Basically you sak the user for a guess, then the outcome is displayed... then I've cleared the screen and redraw / reload it. This wouldnt be done in the real world since rendering would take … |
| | [B]hi alll am a new member of this this amazing community and feel good to be part of it.i required help regarding simulation of multilevel feedback queue.i have checked many samples of scheduling but couldnt got right...so can any body help me?? code of this simulation should be in c/c++ …  |
| | Im having trouble with the Running product in my C++ program. Where is the question: > 2. Write a program that repeatedly reads in integer values until a value less than or equal to zero is entered. For each value, it should print the product of the numbers from 1 … |
| | Just curious how you feel about a few things... First, how do you feel about operator overloading? Our next project "can" involve it if we chose and I think it would be easier that way, but the TA's said some people think its a bad idea. I was just trying … |
| | I have to write a function that reads a string and outputs only the consonants. example: string: adadad output: ddd I wrote a program without the function and it works. Now I'm trying to change the program to use the function. As of now my only error is: error writing … |
| | Can the [I]main() [/I] call be embedded within a class? At work yesterday I caught a snippet somewhere, and I noticed [I]main()[/I] was inside a class, something like the following: [code] [B]class[/B] personnel { [B]void[/B] in_prev_data(); [B]void[/B] in_new_data(); [B]int[/B] main( [B]int[/B] argc, [B]const char[/B] **argv ); [B]void[/B] process_data(); [B]void[/B] pack_data(); … |
| | Hello, i'm just starting to learn the very basic's of c++ but what i need is either a link or someone with alot of patience for c++ sockets, i'm planning on making a direct connection message encrypted chat program, but i can't find any eliable easy to use sites for … |
 | When trying to compile a C program including the code below, I keep getting this error and I don't know what to do to fix it. Please explain if you can! Complete code may be downloaded from my website at [url]www.atrixnet.com/cquestion.zip[/url] (It's only 2 Kb) I suppose I'll attach it … |
| | :sad: There is a programming question. This is searching program. there is a string array. In this string array ther is a sentence. I get a word from the user . When the user's word is match with the sentence that is in the string , a message will appear … |
| | :( There is a programming question. This is searching program. there is a string array. In this string array ther is a sentence. I get a word from the user . When the user's word is match with the sentence that is in the string , a message will appear … |
| | Could someone please help me with my code for the hangman game. The problem seems to be with the playGame() functions while loop. [CODE] #include <iostream> #include <fstream.h> #include <cstdlib> #include <cstring> #include <ctime> //To generate a random seed //The function prototypes void DrawState(int state); //Draw the hanging progress steps … |
| | Hi, I am currently writing a C++ API for Unigraphics(CAD Program) as part of my final year uinversity project. In the example programs im modifying, there is alot of use of '*' and '&', in the context: When defining variables: char *feature_select = "Please Select Features"; void *filter = NULL; …  |
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