51,593 Topics
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| | I'm developing in c++ but yet need to use FILE * from c (I know fstream option) I want to read line by line [code] string str; char* line; while(!feof(file) && FIleLength(file)>0 && fgets(line, 1024, file)) { str=line; str.append("hi"); fputs(str.c_str(),file) } [/code] I have a few concerns: 1) What if …  |
| | Hi! I'm new to this forum and joined as i had some doubts regarding c++. I've been studying c++ at school for about 8 months now and now we've been given a project to complete. Here's the topic: [url]http://www.cbse-sample-papers.blogspot.com/2008/09/computer-science-project-c-class-xii.html[/url] I've decided to make a Manager mode sort of a program …  |
| | string pin, checks, list; checks = whitecheck(kingsq); pin = whitepin(kingsq); list = whitelist(checks, pin, wkbool, wqbool, enpassant) i wrote a chess program in VB6 and have finished converting it to C++. however everytime pin or checks is not a null string it throws a GPF. how can i pass the … |
| | If you have done a program in VC++ 2008, what is the procedure to do a release and a "Finished" program of this. In the "Form1 Property Pages", I have under General choosed: Configuration: [I]Release[/I] Platform: [I]Active(Win32)[/I]Output Directory: C:\ Intermediate Directory: [I]C:\[/I] When I now compile the application using F7, … |
 | After pondering and wondering, I have decided to go for wxWidgets. Here is my first trial application. After running a test app from zetcode.com in my Code::Blocks & wxWidgets and I confirmed that it is fine! Then I tried to write my own app as shown below but I ran … |
| | For the moment I am getting the computers name with this code, but perheps there could be others and better ways to get a computers unique "ID". I am searching for a way to identify a computer so a software can recognice that computer in order to work. The very … |
| | I use in my code (c++) CopyFile and DeleteFIle do these fumctions throw exceptions? do I need to surround them with try and catch?:) |
 | So, i wrote stack, which is using vector strategy in case of being too small. The code compiles well and works until the resize function is called to resize the size of array. Tnx for any help solving this error. [CODE=cplusplus]#ifndef STACK_H #define STACK_H const int DEFAULT_SIZE = 10; template … |
| | i want from any one to write the following programme for me i want it by graphics & off course i want the full programme i want the programme written in borland c++ [U] The programme:[/U] it is required to build an application which simulates the famous connect-4 game. the …  |
| | how do i create a set method to get the fstream input file. in need to be able to define the file location in the main method. [CODE]class a { private: ifstream fileOne; ofstream report1; public: void setinput(std::ifstream& in); void setoutput(std::ofstream& out); }; [/CODE] how can i code these set …  |
| | i have a delimited file it has name|address|address2|phone number/n i found this code snippet of code which i modfied to almost do what i want. the problem is i want to only count the delimited char which is '|" and '\n' but the program is counting the char instead. here … |
| | After being told using scanf and printf instead of cout and cin because they are treated like a function instead like cout and cin being treated as a object thus equaling faster code generation so I am relearning as a i go Can you not use a string in printf …  |
| | Hi, i've only been learning c++ for a couple days now, so im fairly new to it. :p. After I read the basic tutorials and got somewhat used to the c++ environment, I attempted to create a calculator and after trying to solve all of my errors, it became very … |
| | Hi, What I actually want to do is really quite simple,that is, convert all the data(of short type)in a file to their abstract values respectively.But I did not accomplish it. Here my code is listed:[CODE] #include <iostream> #include <cmath> #include <fstream> using namespace std; int main() { char *in_name = … |
| | hey ive got 2 different classes and each class has its own struct with the same type of data... would i be able to create a function that returns the whole sturct from one class to the other? ive got something basically like this class A{ private: struct student{ int … |
| | Any one help me plzzzz..... i have an assignment...... that is ______*********_______ Write a program that takes an equation as a string and does the following: Solve 8 parts to achieve 100% 1 - 5 are compulsory. Input: 2x^2+3x+4=0 1) read a quadratic equation 2) print its coefficients (coefficients range … |
| | Hi iam trying to make dual function visual c++ button what I did was [url]http://www.4shared.com/file/105379147/23d04050/dualactionmfcbutton.html[/url] I want it to work can anyone help me ? Thanks |
| | I'm having problems reading taking an input using cin.getlin [CODE][LIST=1] [*]cout << "Enter record: "; [*]cin.getline(title, 100); [*]csis << "Enter record title: " << title << endl; [*]rec->setTitle(title); [*]cout << "Enter performer: "; [*]cin.getline(name, 100); [*]csis << "Enter performer: " << name << endl; [*]rec->setPerformer(name); [/LIST][/CODE] The program jumps to … |
| | [code=cplusplus] #include <iostream> #include<string> using namespace std; int main() { string str1="Amusement Park"; string str2="going to"; string str3="the"; string str; cout<<str2+''+str3+''+str1<<endl; cout<<str1.length()<<endl; cout<<str1.find('p')<<endl; cout<<str1.subtr(1,5)<<endl; str="ABCDEFGHIJK"; cout<<str<<endl; cout<<str<<endl; cout<<str.length()<<endl; str[0]='a'; str[2]='d'; cout<<str<<endl; return 0; }[/code] |
| | Hi, I was creating a Gui for one of my classes and I hit a major bump. I am trying to take words from a text file and just display it in the text box. I know how to read files, what I don't know is how to change the … |
| | Hi, do not know how possible is this but here it goes, i'm trying to declare an array once a program is running. This is how i'm thinking: [CODE][LIST=1] [*]int size; [*]cout << "Enter size of array: "; [*]cin >> size; [*]Holding *holdLib[size]; //this is a base class pointer array … |
| | Hello, I wonder what I need to do to use find() from <algorithm> to search in a vector containing some Struct, with two string vars. I'm not asking for codes now, I just want the principles. I written this, and got compilation error. [CODE=cpp] #include <iostream> #include <algorithm> #include <string> … |
 | i need to know how to make a string variable in C++ i need to hold the file path of the desktop on a variable. in vb.net it would be like this: dim path as string = "path\to\desktop"  |
| | I'm trying GUI Library to see what fits me. I want to try GTK+ too. But I don't know where to start. At GTK+ site I took a look at C++ bindings [url]http://www.gtkmm.org/[/url] and found * glibmm 2.20 (stable) * gtkmm 2.16 (stable) * libgnomecanvasmm (stable) * gconfmm (stable) * … |
| | Hi all, i was wondering if anybody could help me with this issue. I am trying to create an update tool within c++ which checks the download webpage file to see if it has been updated since the last recorded date. My problem is that i have no idea where … |
| | hi guys, i've been battling with this program for too long now... i cant seem to get it to compile. i believe the problem lies in my use of objects being passed to different classes as parameters. (i will do my best to only paste code that i believe is … |
| | I have a file format for storing text of any sort. It's a file format from a company, so I can't change it. Basically, in the beginning of the file, a series of "string starts on char#", "string length equals" values determines the "address" where a string starts and how … |
| | I'm new to C++ and I'd like to start correctly. But I need to know what are the best practices for code sharing, like: _ use [ICODE] int void (main) [/ICODE] instead of other statements; _ use standard libraries when possible; _ what are the naming conventions for C++? I've … |
| | I use this command to check for the Computername wich returns: [code] SystemInformation::ComputerName->ToString(); //returns: MYCOMP-EG03R8F [/code] When manually rightclicking "My Computer" and check what name I have, it says with lowcase letters: [B]mycomp-eg03r8f[/B] So it doesn´t return the correct name. It shows Capitals. But if I do this command instead: … |
 | I want to make an input stream parser capable of handling input in any of the following forms: [code] x y z x,y,z x, y, z (x,y,z) (x, y, z) [/code] Is there a clever way to do this? Or do I have to check the first character, if it … |
| | Hi guys/gals, ive been reading alot about bots and i kinda like the idea of creating one. can these bots be created in any programming language or does it depend on what i want the bot to do? ive probably posted in the wrong forum, sorry cheers Darren  |
| | how can i convert a hex value of a byte (unsigned char) to a short value? [code="c++"] unsigned char hexByte = 0x02; short value= ??? [/code] thank you for your help! |
 | good time people I have a code like the one below: [code=c++] #include <vector> #include <stdio.h> #include "mymath.h" using namespace std; int main(){ int n; char a='y'; do{ cout<<"\n----------------------------------------\n"; cout<<"Enter a number for prime factorization : "; cin>>n; cout<<"\n----------------------------------------\n"; int *result=pfact(n); for(int i;result[i][0]!=0;++i){ if(result[i+1][0]!=0) cout<<result[i][0]<<"^"<<result[i][1]<<"*"; else cout<<result[i][0]<<"^"<<result[i][1]<<"=";} cout<<n; cout<<"\n----------------------------------------\n"; cout<<"Do … |
| | Is it possible to indicate that a class function you are calling is static? [code] class Point { std::string name; public: Point(){} static void DisplayName() { std::cout << "Point" << std::endl;} }; int main() { Point.DisplayName(); //this doesn't indicate the the member function is static //maybe something like this: //static_call(Point.DisplayName()); … |
| | hey I am currently working on a Fraction program and the fraction needs to be in lowest terms i have been working on this for a while and I can't figure out what is wrong with it i think i have been looking at it for too long, but anyways … |
| | hi, i'm having problems with my homework. I have to create a Base classes from which 2 classes have to be derived, then i have to write a program to test their function. The problem that i'm having is that i'm taking the input from the keyboard and passing it … |
| | So this is a small part of a bigger project I'm working on. I'm having trouble with having a visual countdown starting from a value the user inputs. I have three elements on the form textBox1 where the user enters the value to start from and label1 where the visual … |
 | [code=c++] void func(char*,int&);//A function returning no value and taking a char and reference to int as arguments. typedef void (*PTR)(char*,int&);//A pointer to function returning no value and taking a char and reference to int as arguments. void Func2(PTR);//A Function taking such a pointer as argument. PTR Func3();//A Function returning such …  |
| | [COLOR="green"]Hi, does anyone know of a good tutorial for converting 'Ogg' files to 'AVI', I'm using MS VC++ 2008; MFC GUI classes preferred, but i'm still interested in 'Command Line Apps'; I am not using Linux, strictly WinXP. thanks[/COLOR] ;)  |
 | Hey, I've been trying to understand what the hell I'm doing wrong with this code. At the beginning, I include the DDRAW.H, and the code compiles with no problem, but as soon as I try using a function from that header, I get a linker error. The function I used … |
| | [CODE]Suppose that a stack s and a queue q of characters are initially empty. Show s and q after each iteration of the second for loop of the following code fragment: for(char ch = 'A'; ch <= 'H'; ch++) s.Push(ch); for(int i = 1; i <= 4; i++) { s.Pop(); … |
| | Problems 1. Results for height and weight output fine but I am trying to have gender change the following boolean assignment statements. 2 different results for height and weight base on either female or male. exp. males height is [COLOR="Red"](height >= 62 && height <= 78)[/COLOR] but for the female … |
| | Hello, I am finishing up my first C# application and I have one wrinkle to iron out. My form has a number of controls at the top but the majority of the area is filled with 3 datagridview controls. The datagridviews were dragged on and sized in the design view. … |
| | I have a problem about std::vector as member of class, I'm not clearly about the initialization mechanism [CODE=c++]#include <iostream> #include <vector> using namespace std; class Obj; //this is a Class object class Grid { public: Grid( ) { } ~Grid( ){ } protected: private: vector<Obj> v1; //initialization mechanism ? and … |
 | Hi I have a question. [COLOR="Red"]The aswer is very short [/COLOR]I think. I got many different useful helps in different forums but [COLOR="Green"]still[/COLOR] my main question is [COLOR="green"]not answered clearly[/COLOR]! MY QUESTION: Can a [COLOR="Green"]not inline[/COLOR] [COLOR="Red"]method[/COLOR] have [COLOR="Red"]internal linkage[/COLOR]? This question is simple & clear (if you don't think … |
| | ok, I have a very serious somewhat simple problem that I just can't seem to figure out myself. Simply put I want to make a program take the lines Hello How Are You ToDay and output ToDay Are You How Hello Using the End of data marker as a newline … |
| | hi guys, new to c++ here. So we have a school project due tomorrow, a hangman game of sort and i just wanted to go a bit above the required so i thought i would put in a message box. Now i got the working and all but the thing …  |
| | it is possible to change the colour of the font in the terminal by using come sort of code, not sure of the correct term, what im after is like cout << "hello" << endl; and hello would be bold or a different colour, can that be done? |
| | Greets, A string array in C++ can be initialized, just like everything else. With that in mind, how do you count the number of items in the array? I mean, how many rows? Let me give you an example using Char arrays (having two dimensional since it's not like string) … |
| | Hi guys, i have been having problems with this piece of code all afternoon, i have never seen this error myself before and cant see how the problem is applicable in my situation from looking though the various forums of the world ! Basically the program is a small game … |
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