51,593 Topics
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| | Hello, I am a newbie in C++....I am trying to modify program to read in upto four words or 30 characters into a string and then print it out. Here is the code..... [code] #include <iostream> #include <conio.h> using namespace std; int main() { bool isWord = false; char ch; …  |
| | Ok i have been working on this for a few days and can not get my main right. I have tried so many diffrent things and couldnt get it any help is appreciated. Design, write, and test a program that simulates some aspects of a simple savings account in a …  |
| | Greeting All, Peace. New to this forum and am confused about how to approach data analysis of variables with C++. My question I is am simply going to do simple descriptive statistics (mean, mode, variance), and a little more complicated chi square / correlation (Pearson). The approach that I am … |
 | Hey guys, I was wondering if the stringstream class copied the string to itself or just keeps a pointer. Because if it copies I can free or clear the string without fearing for the data in stringstream. EDIT: Like this: [code=cpp] string stringz0r("Chickenz"); stringstream streamz0r(stringz0r); //will this not affect the … |
| | Ok, new to C++, I bet this is a real easy question. Every time I input a char, it enters the same char twice to variable. So when I enter "r", and then output it..it outputs "rr" [code=c++] #include <iostream> #include <fstream> using namespace std; #define errorMsg1 "You must enter …  |
| | I'm new to C++ and I can't seem to find the problem with my code. I have a function that opens an input file. It asks you to input a file and if it can’t open the file it asks you if you want to try again. If you answer … |
| | I am trying to set up an emailprogram, the first code that I try to compile is this where I set an emailTo and emailFrom in the arguments of MailMessage. When I compile this code, I have an errormessage that says. [I]'System::Net::Mail::MailMessage' : class does not have a copy-constructor[/I] What … |
| | Write a program where the user enters numbers (doubles) on standard input. All of these numbers should be greater than zero, except for the last one, which should be -1. The -1 is a sentinel value and is how the user signals that he or she is done entering numbers. …  |
| | Hello, I am working on something where i need to search and replace many variable names of a program. For example, I have a class [B]Hello [/B]and its public variable is [B]world[/B], but the variable world has been changed to [B]earth[/B] so now in the program i need to go … |
| | If you want to run 2 loops at the Very same time in C++, will backgroundworkers have this functionality ? An example could be how I have set up it in this code. What I wonder is if the backgroundWorker1 first is executed and when this is finished, then backgroundWorker2 …  |
| | To all the Masters, Sir can you help me in this problem, the program tells the infix to convert into postfix. ex. a+b-b*c+g/s =[U]ab+bc*-gs/+[/U] My problem is, once you compile the program there is no error message, but if you run it, the output did not show. I know this … |
| | Hi, Okay I have problem with my homework. In the code i need to run either object2 or object1. Its a shooting game made in turboc. So if I hit keys a,d or space, i need the tank to move and otherwise i need the object to come down. Thanks |
| | Hi I have problem at pointing to the function at the class structure. To demonstrate my problem,I have written a simple code. I have two function. ''Xsquared'' returns square of input value. ''multipleby4'' multiplies by 4 of input value. The pointer to the Xsquared is the input value of the … |
| | Hello, can an exe statically linked by c++ or code blocks run on a mac? if it requires a software to convert it, which would you suggest? Thank you for any help.  |
| | I am just getting started with C++, so please explain things to me in the most basic way you can. I really don't even know where to start to be honest. Below is a problem that I would like to learn how to code. Examples are welcome. Thank you. Suppose … |
| | [code=cplusplus] include <iostream> main () { int a, b; bool found; cout << "Enter two integers: " cin >> a >> b; if a > a*b && 10 < b found = 2 * a > b; else { found = 2 * a < b; if found a = … |
| | Hi, I'm trying to do a program where I have to input 4 lines of text from a txt file, char by char into 4 seperate arrays (1 for each line). I have this [CODE] ifstream input("c:\\p2input.txt"); for (int z = 0; z < 250; z++) { while (!input.eof()) { … |
| | Hi, I try to generate uniform random number between 0 and 1. I wrote this code but it creates only numbers at the 0.1***. Generated number always have 0.1 and remaning numbers change, like 0.1234, 0.13444,0.143334.... Can you show me show how can I generate these numbers (uniformly) at (0,1]. … |
| | Hello and thanks in advance for your help. My program calculates the gratuity of various bills and gives the user how much to leave for a tip. If the user enters a negative amount for the tax, the default constructor is supposed to use 6.5%. My program compiles, but instead … |
| | hi, Please tell me why an empty Structure will occupy 2Bytes in C++ Thanks |
| | hello i wrote a c++ program, and i wanted to send it to my friends, but everytime i send the exe file to them, they tell me they get the error: "The application has failed to start because the application configuration is incorrect". I tried to put it on rapidshare, … |
| | Hey, could I have a little help please. What I'm trying to do is display a message if the user clicks their mouse, I have: [CODE] int main() { mouse_event(MOUSEEVENTF_LEFTDOWN, x, y,0,0); } [/CODE] How would I get it to display a message? I'm thinking an if statement but dunno.. … |
| | Hi all, my name is Karim, and I am migrating from Python to C++ in order to make windows and linux based games. I am using the Visual C++ IDE, and am a complete newbie when it comes to C/C++. Python is so overly simplified that it does not provide …  |
| | Hi, I'm completely new to C++, which I'm doing as part of a numerical methods course. I have experience with IDL, so I clearly like languages with training wheels :) I'm running the GNU C++ compiler under Ubuntu 8.04 on a Dell XPS. I've made my first program run, but … |
| | Hello all, I'm python guy learning C++ so be patience with me. I am just asking if this GUI builder can be used to make Big app like Thunderbird wihtout external assistance [url]http://wxformbuilder.org/[/url] |
 | how would I go about making a variable in a class, that could be read directly but not written as such? Like, [icode]if(class1.variable==true){ }[/icode] is allowed but [icode]class1.variable = true;[/icode] is not... however I don't want a [icode]const[/icode], I want it to be able to be set from within the … |
| | [CODE]TCHAR exepath[MAX_PATH]; GetModuleFileName(0, exepath, MAX_PATH); HKEY hKey; LONG lnRes = RegOpenKeyEx( HKEY_CURRENT_USER, "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", 0,KEY_WRITE, &hKey ); if( ERROR_SUCCESS == lnRes ) { lnRes = RegSetValueEx(hKey, "YourProgramsName", 0, REG_SZ, exepath, strlen(exepath)); }[/CODE] To add as a HKLM (For all users) startup item instead of HKCU (Current User), change HKEY_CURRENT_USER to HKEY_LOCAL_MACHINE. … |
| | Hi, all i have the assignment about program which reads in integers from cin until the user enters a non-integer (a character or EOF), then print out the average. Its pretty simple assignment but i am kind of new. So the following is my code and seems like have some … |
| | For some reason my if statement in both my [I]unionFunction[/I] and [I]intersectFunction[/I] is setting the array equal to 1 rather then comparing it. I've tried to figure out whats wrong but nothing seems wrong to me. I appreciate any help. Here is my program so far: [code] #include "stdafx.h" #include … |
 | Hey guys, I'm going to be starting a research project pertaining to [URL="http://www.jauswg.org/index.shtml"]JAUS[/URL]. Basically, this is a standardized protocol to be used in autonomous robotics... someone will essentially connect to a robots IP and be able to transmit various commands over 802.11. I not exactly sure where to start, so … |
| | [CODE]/* sscanf example */ #include <stdio.h> #include <iostream> using namespace std; int main () { float f; int i; char * the_string = "foo -3.6 fum dum 17"; int r = sscanf(the_string, "foo %f fum dum %d", &f, &i); cout << f << " " << i << " " … |
 | Hello everyone. I am using ACE and I'm using the following method: ACE_OS::read(char* buffer, int nbbytes, int perms); I was informed that Windows is reading data from disk sectors and it puts the contents of the read sectors into the cache (who is in memory). I don't want that behavior … |
| | Hello, I've got the following code: [code] wxString path = filepath; wxString newpath = filepath; fstream f(path.Append("/tests/tests.bin"), ios::in | ios::binary); fstream fnew(newpath.Append("/tests/temp.bin"), ios::out | ios::binary); Test* transferTest = new Test(); int thisSize = sizeof(Test); bool success = false; bool toBeDeleted = false; int testNo = 1; if (f) { f.seekg(0, … |
| | When I executed the following code the output appears to be very strange to me. Can any one explain this unexpected result to me. The code: [code] #include <iostream> using namespace std; class Y { private: int x; public: Y() { x = 7; } int getX() { return x; … |
| | Error : warning: cannot pass objects of non-POD type `struct std::basic_string<char, std::char_traits<char>, std::allocator<char> >' through `...'; [Code] int main() { ListeString Parts; ListeString::iterator iter; Parts.push_back("One"); Parts.push_back("Two"); Parts.push_back("Three"); iter = (*mtcParts)->begin(); while ( iter1 != (*mtcParts)->end()) { printf("%s\n",*iter1); iter1++; } getchar(); return 0; } [/code] By using cout, i am able … |
| | hi I want to write some text on windows wallpaper. does anybody know how to do that. (on wallpaper ,but under window frames.). (dynamic text: like time. so please do not suggest to write it with paint. :) ) |
| | Hello, I am having some trouble reading data from a .txt file. I know that the file contains strings separated by white space. The problem is, I don't know how many strings there are, so I would like to go through the file one string at a time, and then … |
| | When a pointer is deleted, is the memory it is pointing to only returned to the heap or is it also nulled too? Thx |
| | These are my three files. The header file.... [CODE] #ifndef MONTH_H #define MONTH_H #include <string> #include <iostream> using namespace std; class Month; ostream &operator<<(ostream &, const Month &); istream &operator>>(istream &, Month &); class Month { private: string month; int monthNumber; public: Month(); Month(string); Month(string, int); void setName(string); void setMonthNumber(int); … |
| | Hi there, I am trying to write a C++ app using Dev-C++ 4.9.9.2. The app is supposed to read in a txt file and then use templates to read in the files and swap data that gets populated in a ptr array. The errors are: [Linker error] undefined reference to … |
 | Hi. I am making a program, and I have a main section and a class that the main section tefers to in a .h file. The Ifstream part wont work, and i dont know why. Please help. MAIN: [CODE] #include <iostream> #include <cstdio> #include <cstdlib> #include <string> #include <fstream> using … |
| | Can any one help or give some good advice on where I need to go from a point in my code. I am building an asterisks tree and I managed to get that part done, but there are three thing I need to input to complete the assignment. 1. And … |
| | I'm having trouble getting my sprite to go from the right side of my screen to the left and then swap images so it appears to be walking back to the right side and then repeat that process. Ive manage to only get the cats to walk to either direction … |
| | I'm writing a class planner with a structured array declared in the header [code=c++] #include <string> using std::string; struct Classes { string ClassName; string ClassNumber; string DaysMet; int StartTime; int EndTime; string Teacher; int Students; }; [/code] this is the print function of the program [code=c++] int Print() { system("cls"); … |
| | hi, Here is my code on the three sorts. I've place in the counter called icompare&imove for insertion sort; bcompare&bmove for bubble sort and scomare and smove for selection sort. I've also used time_t as a timer to calculate the time it takes to sort the three. can someone please … |
| | What I would like to do is write an application that a user can interact with through IE for submitting mathematical notations. What is the best method of doing this ? Will a plugin work or maybe a browser add-on or an active x control ? I am not familiar … |
| | In my MFC c++ app, when I try to include afxwin.h into my project, it gives me these errors. Whats the problem with it? Did I misunderstand something? I'm using vc++ 2005 express if it makes a difference. [TEX]1>C:\Program Files\Microsoft Platform SDK for Windows Server 2003 R2\Include\mfc/afx.h(250) : warning C4793: … |
| | how would you seperate a character in a string. For example : string ="2x^2+8" how would i seperate the string into '2' 'x' '^' '2' '8'. so I could find its derivative. |
 | PROBLEM : A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99. Find the largest palindrome made from the product of two 3-digit numbers. I came up with a solution for the above problem. I … |
 | I've searched all over the place and I cannot seem to find a well working, reliable solution to this that is not platform specific. Here is what I have: Main menu of a class (while loop with 0 as exit). User selects choices. Choice calls class function to carry out … |
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