51,593 Topics
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| | Hi, we have this school activity that is rush for tonight. I would really appreciate if somebody will help me. It would really mean a lot to me. So here is the problem that were tasked to us to create a C++ program. Problem: Write a C++ program to perform …  |
| | Hello! I am making a program which does many computations for a Photovoltaic system. The problem is that i get a strange segmentation fault error when I run the program. Here is where it crushes (at for-loop of calculation S5) : [CODE] commands..... ... ... /******************** WIRING *******************************/ Ni = …  |
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| | Hello. I am trying to write a program where a human can play rock, paper, scissors with the computer. I'm stuck on the "determine computers choice" part......Here's my code so far... [code=cpp] #include <iostream> #include <cstdlib> #include <ctime> using namespace std; int main () { // initialize the computer's random … |
| | this is a piece of my header file that is a template and my implementtion file that is using it.I keep getting errors and dont know why,any help would be appreciated. [CODE]template<class T> class List { public: private: T *list; int size; int numElements; bool isValid(int location) const; }; [/CODE] …  |
| | Hi there, I need to read a file with unknown number of columns and lines. Basically, I have an ID per line (ID00005) and many columns containing 2 letters. The format is: ID00005 RR WW SS QQ TT RR UU II ID00008 WW SS QQ YY HH JJ KK LL … |
| | I recently started visual studio 2010.After searching in google I was able to create a .cpp program. everything is fine; I can build it and run it without getting errors.But everywhere in the internet I see when they run the program they can see a black command prompt window which … |
| | This function is returning the error "matrixOpsLibrary.h:11: error: invalid initialization of reference of type ‘const std::Vec&’ from expression of type ‘const double’" [CODE]#include <vector> #include <cmath> using namespace std; typedef std::vector<double> Vec; //Vector Vec floor( const Vec& y ){ unsigned n = y.size(); Vec bottom(n); for( unsigned e=0; e<n; ++e … |
| | I was wondering if there is a library or smt that can allow a programmer to use other foreign languages in C++. For instance i want my c++ program to display some Greek messages that i will define, but instead i get some garbage. Is there anyway to call unicodes … |
| | Hi, How do I correctly call a function which expect BSTR* as a parameter? eg: [CODE]void FunctionA(BSTR* b) { // Do something }[/CODE] Currently, my code is as follow: [CODE]void Caller() { BSTR* pbstr; FunctionA(pbstr); }[/CODE] However, during compilation, I get warning "local variable pbstr' used without having been initialized". …  |
| | hi i compile this code but it works but i have as result the error message "Memory is insufficient! " [CODE] #include <iostream> #include <iomanip> #include <fstream> #include <string> #include <math.h> #include <nurbsS.h> #include <nurbsSub.h> using namespace std; int i ,j , l , k ,x,y ; float b; const … |
| | I wrote the following code to create a wav file which generates varying frequencies based on the Hebrew Gematria pattern. It compiles great but does not write the wav file. What am I not understanding about this code? [CODE] #include <iostream> #include <math.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include … |
| | Hi All, When my code tries to free the memory allocated by the new operator it throws a debug error while using the delete operator... [CODE] CDocum* pDocum = new CDocum(); int nResult = pDocum -> QuoteDocProd(); delete pDocum; [/CODE] Error Am getting is Debug Error! Damage after Normal Block(#298753) … |
| | Hi! I try to compile this code [CODE] while( file >> word) { word.size(); T[i]= new string[word.size()]; *(T[i])= word; i=i+1; } for (j=0;j<i;j++) { Bt[j] = new float [100]; *Bt[j] = *atof(*(T[j]).c_str()); } [/CODE] but i have this problem [CODE] error C2228: left of '.c_str' must have class/struct/union [/CODE] where … |
| | hi, am a novice in programming. i am facing some difficulty in C++ programming, actually i want to read a column of numbers from a text file or an excel sheet and store that in an array so that i can use it for further processing.Plz help me to solve … |
| | pls give me a hint or any idea on how i can solve my problem..tnx.. |
| | Code 1: [code]#include<iostream> using namespace std; int& func() { int a=6; return a; } int main(void) { int a = func(); cout<<a; cin.get(); return 0; } [/code] According to my thought , first of all func() will create a temporary reference to a (as it is returning by reference) , …  |
 | Hello everyone, I have a small question about the code below, I understand just about every part of it. Except for this small snippet, could someone explain how the loop works? [CODE] while(begin != end ) //<-- I believe the stream iterator is getting input here words[*begin++]++; // <-- I … |
| | I keep getting errors and i dont know what im doing wrong.I've included just pieces of these three files. The compiler is giving me errors and i dont know what's wrong. this is my header file List.h not all but some of it. [CODE]#include <iostream> using namespace std; #ifndef INTEGERLIST_H …  |
| | Hi, I'm stuck... I'm writing a program that creates a data file then populates the file with 500 random integers both positive and negative. The problem I'm having is reading the integers from the file and storing them into three arrays for processing neg[],posEven[],and posOdd[]. I really just need a … |
| | Hi! I´m newbie in C++ Code and JNI, so i have a big problem and i can´t found a solution. My question is: Is possible to call a Jni method in a normal ,method, so: I have in my c++ class, two method: void CVentanasDlg::OnButtonStart(){ printf("OnButtonStart"); } JNIEXPORT void JNICALL … |
| | What happens when you set an int or double value to less than the minimum? I need my program to recognize when a number is smaller then the minimum, and then set the value to equal the minimum instead. This behavior is not the default... [CODE]#include <iostream> using namespace std; … |
| | I do not know how to compile a visual C++ project using makefile ! I am trying to build a boot loader using C++ and assembly. This is the list if the constituent files in the project: start.asm //this is the beginning bootMain.cpp //main function displayScreen.cpp //clears th screen buffer … |
| | hi all friend I wanna Read some data from my Excel , but I can't work excel 2007, do you know what's problem. |
| | hi i want to change the static table to a dynamic table using pointer what should i change in this case ? [CODE] #include <iostream> #include <fstream> #include <string> #include <math.h> using namespace std; int i ,j , l , k ,x ; float b; const int maxElements = 10000; …  |
| | I was trying to write a program . But when i run it i have this error message this application has requested the runtime to terminate it in an unusual way |
| | write a program that can be used to assign and book seats for a commercial cinema. The cinema has 16 rows, with 20 seats in each row. The seats at the mid-column (number 5 to 15) of the last 2 rows closest to the doors (row A and B) are … |
| | I was reading a book and i faced an issue here [CODE]39 template< typename NODETYPE > 40 void Tree< NODETYPE >::insertNode( const NODETYPE &value ) 41 { 42 insertNodeHelper( &rootPtr, value ); 43 } // end function insertNode 44 45 // utility function called by insertNode; receives a pointer 46 … |
| | I tried to store several data an cant achieve it: [CODE] #include <iostream> #include <string.h> #include <stdlib.h.> #include <stdio.h> #include "estructura.h" void guardar_cliente(cliente x) { FILE*f; f= fopen("data.txt", "w"); fwrite(&x, sizeof(x), 1, f); fclose(f); } [/CODE] I dont know whats wrong im using another cpp file and a header file … |
| | If i had to write a program with 10 different functions are you aloud to just make some functions templates and other functions initialized with data types like normal??? |
 | I think its more than a year that I ask my questions about programming in this forum.Looks like its the time that I help a little too. So I wanna put my best here.I hope it'll help some one. Still I'll appreciate any suggestion. Another point,It was my first time … |
| | I want two function names that do the same thing, allowing the user to use whichever they prefer. For Vec a, i use "const" because a is never changed. Correct me if this is the wrong usage. For int n in operator|, i do NOT use "const" because n is … |
| | I am trying to use CString's LoadString function but it never retrieves the text from the string table. I ported the application from Visual Studio 6 to visual studio 2003. I looked all over the web but nothing is working. Somebody help me! And if you could be very specific. … |
| | I was advised that I should not import the std namespace in a header. Also, I should create my own namespace for my library (a header file I created with function in it). Why is it a bad idea to use the std namespace for my new functions? If all … |
| | Hi I am New to MFC actually i want to know that how to open New Window/ New Form From Main WIndow. Please Help me in that Thanks. |
| | There is an error concerning lines 10-14. I had been using this code previously without errors. I'm not sure what I may have changed. The error is "invertMatrix.cpp:14: error: invalid use of incomplete type ‘struct std::stringstream’ /usr/include/c++/4.2.1/iosfwd:83: error: declaration of ‘struct std::stringstream’ " [CODE]#include <iostream> #include <vector> #include <cmath> using … |
| | I am writing some code to simulate a football tournament by comparing several teams on several parameters. I need to be able to knock out teams, edit some stats mid simulation, and be able to easily access individual teams data, what structure would I be best using? I had thought … |
| | Hi there, I'm trying to teach a few students how to create a text adventure game. In the past, I've generally gone about the route of using nested if-statements because it seems a bit easier to visualize. Here's what one has done in the past, and ignore the crazy code-formatting … |
| | Dear friends: I use the find algorithm in STL to find a term in the vector<string>, but the find only return the iterator, how to return the index number of the term. Regards  |
| | I want to iterate through a list of objects, then erase all objects from the list which meet a certain criteria. Here is an example using int type as my object: [CODE] list<int> m_list; // Fill list with int values... // Find ints == 4 and erase them auto it … |
| | Hi all! I have a little problem here, I would like the width function in cout applied to all the sucesive outputs. However, it is only applied to the next output only, I mean, with this code I get 0:00:10:20:30:4 1:01:11:21:31:4 2:02:12:22:32:4 3:03:13:23:33:4 4:04:14:24:34:4 5:05:15:25:35:4 6:06:16:26:36:4 7:07:17:27:37:4 8:08:18:28:38:4 9:09:19:29:39:4 and … |
| | its my code pleas tell me y error occur in it. impex.h file [CODE]#ifndef IMPEX1_H #define IMPEX1_H enum shapetype {Point=1,Polyline=3,Polygon=5}; struct pointD { double x; double y; }; struct item { int id; list<pointD>coordinates; shapetype type; }; class impex { public: impex(); void savekml(list<item>); private: }; #endif .cpp file #include<iostream.h> … |
 | Hello, i was wondering how you would create a file association in c++ with the registry, in lua it would be something like this... [CODE] function File.SetAssociation(Ext, Exe, Icon, Long) local cKey = Long; Registry.SetValue(HKEY_CLASSES_ROOT, Ext, "", Key); Registry.SetValue(HKEY_CLASSES_ROOT, Key, "", Long); Registry.SetValue(HKEY_CLASSES_ROOT, Key.."\\DefaultIcon","",Icon..",0"); Registry.SetValue(HKEY_CLASSES_ROOT, Key.."\\shell\\open\\command", "", "\""..Exe.."\" \"%1\""); end … |
| | .the program should use singly linked list of records.It should print he original directory then make some insertion and deletions then print the final directory. it should follow the steps 1. input initial listings such as name, address, and phone number. 2. input update records such as 'I' for insert, … |
| | I launch 2 programs within my application with PROGRAMNAME->Show. Let's call them Prog1 and Prog2. I have a dummy form that I use Application::Run to keep the software running. When 1 of the program closes, I call Application::Exit to shut down the application. This doesn't allow the other program to … |
| | i need a code for this!! Z asterisk pattern!! plsssssssss The program forms the letter Z by printing n input character symbols on the upper line, n input character symbols on the lower line, and n input character symbols on the diagonal line. If the value of n is less … |
 | I'm new to C++ and here's a simple assignment. I'm not sure how to pull this off... ANY help will be appreciated . Here's the code for the assignment... You have to implement a function called approachPi that takes no parameters, and has the return type double. This function returns …  |
| | Which of the following are valid function prototypes? x one(int a, int b); int thisone(char x); char another(int a, b); double yetanother; void thelastone(); void (function1) void; void function2(void) void function3(n, x, a, b); x void finction4(int n, float, char c); x void function5(int, a, int n); Which of the … |
 | I typically make a Types.h to define all of my types in and then include that in all of my project files. I haven't ever seen this anywhere though, so I assume it is "bad/wrong". The situation is often like this: Consider a class Gardener that needs to know type … |
| | Hello, I have been tasked with writing a test application to convert between geographic coordinate systems. Now math is not my strong suit but I was assured I wouldn't actually have to do any of the calculations since the formulas are provided. The trouble is trying to get the lengthy … |
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