51,593 Topics
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| | The program asks to input an integer larger than one. the number is then passed into a function that calculates the sum of squares from 1 to that integer the output should be the value of the integer and the sum(labeled). A negative input value signals the end of the … |
| | Cant figure out whats wrong with code. This is code should "write a program to compute the interest due, total amount due, and the minimum payment for a revolving credit account. The program accepts account balance as input from a file, then adds on the interest to get the total … |
| | hi guys, im trying to do map in cpp using STL and when i ran a simple program it was showing error that: error: nomatchfor'operator<<'in'std::cout<<(&mp0_iter)->std::_Rb_tree_iterator<_Tp>::operator* [with _Tp = std::pair<const int, int>]()'.... my program was like this: [code=c++] #include<map.h> #include<iostream.h> int main() { map<int,int>::iterator mp0_iter; map<int,int>mp0; map<int,int>mp1; mp1.insert(1,13); mp1.insert(2,16); mp1.insert(3,17); for(mp0_iter=mp1.begin();mp0_iter!=mp1.end();mp0_iter++) … |
| | Say I have an array: array={1, 2, 3} but I want to be able to increase the size, and shift the data to the front, leaving 0's behind. So i want the array to turn into this: array={1, 2, 3, 0, 0} Where I added two to the size of … |
 | This exercise had me build on an earlier program - first ask user if wants to compute, then (if yes) choose circle or rectangle, then prompt for appropriate inputs, calculate, and run again. I had a major brain freeze, such that this has taken me many hours just to get … |
| | Can someone help me with this???? [CODE]/****************************************************/ /* File: name of your file with the source code */ /* */ /* Created by: give your name */ /* Date: give the date */ /* */ /* Program to find the maximum of three */ /* floating point numbers */ /* … |
| | Is there a way in C++ to handle unexpected errors? Other languanges I have learned tend to allow this but for some reason I cannot get the try/catch solution to work in all cases. Take the following example: [CODE] int main(){ vector<int> v; try{ //next line should cause an assertion … |
| | Hello all, I recently was reading some code and i found something along the lines of this: [code="C++"]void GetText() { int* size = new int; // ....... // lots of code here // ....... size = new int; // crap here }[/code] ^^ as you can see size is 'new'ed … |
| | I am trying to read and write a text file into an array and then store it back into the text file. The main problem i am having is the storing the file character by character into the 3D array. Here is my code: [code] #include <iostream> #include <fstream> using … |
| | [CODE]class Array { public: Array (int newSize, int order); Array (const Array& original); ~Array (void); void write (ostream& outfile, char* sortName, char* orderName); int getSize (void); void insertionSort (void); void selectionSort (void); void bubbleSort (void); static void initShellH (void); void shellSort (void); void heapSort (void); void quickSort (void); void mergeSort … |
| | I am writing a Savings account program using a class with methods but it won't compile. I can't seem to figure out why. Hhere is my program. It contains an header file, source code file, and a program cpp file: Here is part of the error I get, C:\Users\JEFF~1.JEF\AppData\Local\Temp\ccWScaaa.o(.text+0x17a) In … |
| | I developing a small program that I want working as a widget, and would like to display it only when no window has focus - or when the desktop window has focus. My best chance now is finding whether GetFocus() returns NULL but this is not working as suspected. I've … |
| | for starters im just learning C++ so forgive my ignorance... that being said... i need to pull 3 bits of info out of a text file. - Last name (name) - stored as a string - First initial (initial) - stored as a single character - Account balance (account) - … |
| | I want to download Image file from web using c++ and save it in specified folder. How to do it?... please help me. |
| | [url=http://cc.byexamples.com/2007/04/08/non-blocking-user-input-in-loop-without-ncurses/]code from this blog[/url] [code]int kbhit() { struct timeval tv; fd_set fds; tv.tv_sec = 0; tv.tv_usec = 0; FD_ZERO(&fds); FD_SET(STDIN_FILENO, &fds); //STDIN_FILENO is 0 select(STDIN_FILENO+1, &fds, NULL, NULL, &tv); return FD_ISSET(STDIN_FILENO, &fds); }[/code] [code]void nonblock(int state) { struct termios ttystate; //get the terminal state tcgetattr(STDIN_FILENO, &ttystate); if (state==NB_ENABLE) { //turn … |
| | I have a simple display() method that essentially looks like this [CODE] #include <stdlib.h> #include <iostream> #include <iomanip> #include "Pieces.h" using namespace std; void Pieces::BeginInstruct(int& i){ cout<<endl<<endl; cout<<i++<<":"<<setw(5)<<"Open the program."<<endl <<i++<<":"<<setw(5)<< "Click \"File\" and then\"New\"." <<endl; } [/CODE] Theres obviously more but what I am concerned with is that setw() … |
| | Been studying what I thought was a fairly authoritative article about BSTRs by Bruce McKinney... [url]http://www.ecs.syr.edu/faculty/fawcett/handouts/cse775/Presentations/BruceMcKinneyPapers/COMstrings.htm[/url] where he states that the four bytes before the start of the BSTR contains the string's length. Here is the exact quote... [QUOTE] What Is a BSTR? The BSTR type is actually a typedef, … |
 | The essential problem is to determine the index i of the first Fibonacci number Fn to have at least d digits. The specific challenge is to determine the index of the first Fibonacci number to have 1000 digits. Obviously, this problem could be brute forced by stepping through all the … |
| | How would I get the code below to time both the iterative version and the recursive version of the Fibonacci function so that I can see which one is faster. I already have the timer.h file to go along with it. I'm thinking i should use t.start() and t.stop() to … |
| | Basically, I need to figure out how to change a buttons text when its clicked(X or O). [code] button1 = CreateWindow(TEXT("BUTTON"), TEXT("1"), WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON, 10, 10, 50, 50, hwnd, (HMENU)ID_BUTTON1, myInst, NULL); [/code] Im using buttons like this. I have it set up in the WM_COMMAND case … |
| | Hi all, I have a question that , can we use java program as c++ program? Means, when we compile a c++ program we get a .exe file and we can run it anywhere or send to any one. Is the same possible in Java? As I know java creates … |
| | Hi guys, I'm implementing a viewer for skinned character animation. Each frame of animation requires thousands of (4x4 matrix * vector) and (float * 4x4 matrix) calculations. This is the section that is repeated thousands of times: [code] // For each vertex influenced by bone for (int j=0; j<(int)Character::bones[i].get_vertices().size(); j++) … |
| | I am making a linked list template. a can search a string input and determine if it is an int. i can declare a node of type int or string. when i try to add to my list, my string node cannot point to an int node and vice versa. … |
| | i have my questions commented in the program . i had to put most of program up so you could see what im doin. please help PROTYPES [CODE]void side_on_die(int& ns1,int& ns2,int& ns3, int& ns4, int& ns5, int& ns6); int roll_hold(int roll, int answer, int turn); int if_roll(); void if_hold();[/CODE] [CODE]int … |
| | It's saying I have 6 errors. Need help, please..or a push into the right direction. Thank-you. :) [CODE]#include <iostream> #include <cctype> using namespace std; int Len_String(char *); int CountCapitals(char *); int CountVowels(char *); int main() { char msg[] = "Strayer - what a University !"; char msg2[] = "Programming is … |
 | Hello I am glad to find this site. I have been searching for help with learning C++, to no avil. So my question, which is multi-fold: I have a book from 10 years back or so, ansi compliant, should it work with dev-cpp. Second, I learned the difference between char … |
| | how would i get the file below to display the number of moves by adding an output statement after the call to move() in main() to display the value of moveNumber, which will be the number of the last move. Thanks! [code] #include <iostream> #include <iomanip> #include "timer.h" using namespace …  |
| | hello guys... can you help me to find coding for grading system for my new assingment...( grade n grade point) grade A= 4.00 A- = 3.70 B+ = 3.50 B = 3.00 B- = 2.67 C+ =2.50 C = 2.00 C- = 1.67 D+ = 1.33 D = 1.00 E …  |
| | My assignment this week deals with using a struct. I think I can do that part. What I'm having trouble with is reading the file into each variable. The first item in the file is text with spaces. The next items are numeric and need to go into other variables, … |
 | hello everyone I am teaching myself c++ and I was wondering if anyone could give me a site that has some c++ exercises particularly on 2d arrays and string manipulation. thank you. |
| | Hi All, I have a C++ DLL, which has a function called INPUT and it is defined as follows in DLL: [code] extern "C" __declspec(dllexport) char* _cdecl INPUT(int a,int b,double D[2],double Z[2],double e,double f); __declspec(dllexport) char* _cdecl input_balr2(int a,int b, double *D,double *Z,double e,double f) { //Do Something } [/code] … |
| | Hi, I'm writing a "Date" class and it's fully functioning, including the output manipulators, but the issue I have is when creating a class the has a "Date" instance in it. It, then, doesn't compile because it says there are multiple definitions of the manipulator functions. I'll lay out, below, … |
| | i'm having a problem in executing a batch file from my c++ code i've included all the necesary headers like dos.h,process.h,stdlib.h code: system(c:\new\ram.bat); there is no error in the program but the batch file does not get executed..... please help ................ |
| | can we declare a array as, int arre[x]; and assign the value of x as,x=5; but error is coming "constant expression required." Any help? i wanted to input series of marks,first you should enter how many subjects(if 5 subs,x=5) then you can enter 5 marks. |
| | hi every one I really need help with this and how to do it =The motel has 12 rooms numbered 1 to 12, and each handles a maximum of 4 guests. Assume all rooms begin empty. Provide a user-friendly interactive menu that allows the following transactions: B – Book room(s) … |
| | Our homework is to compare N circles with each other if they are intersecting or containing.My C file for that is : [CODE]int N=0 , i=0, j, a=0, max=0; float circle[MAX] [3] ; float durum1, durum2, durum3; float intersection[MAX], containment[MAX]; printf("Please enter the number of circles you want to compare … |
| | Hi, I've got a modeless dialog. When user click the X button at top right hand corner, I want to catch the event and do some processing. What event do I use for that..? I cannot find OnClose event in the event handlers box. Btw, I'm using VC++ 6 (MFC). … |
| | #include <iostream> #include <ctime> #include <cstdlib> using namespace std; i am having trouble putting functions in int main(). can someone show me how??? i want to put these function def. in int main() [CODE]int score_num(int& ns1,int& ns2,int& ns3, int& ns4, int& ns5, int& n6, char& gam_answ); int roll_hold(int roll, int … |
| | firstly here is the code i'm working on in visual studio [CODE]#include "stdafx.h" #include <iostream> #include <string> using namespace std; struct Car { string r_number,make_of_car,model_of_car; int mileage; int age_of_car; }; void main () { int i,num; Car *car1; cout << "Please enter the number of cars: "; cin >> num; … |
| | Hey all I'm new C++ and am having a little trouble with a simple program. The program calculates the square root of a number the user inputs. When I input -1 or any negative it comes up as 1.#ind. Ideally when the user types -1 i want -1 to come …  |
| | So I have been asked to write a template class for a binary tree (easy) the hard part is that the nodes have to be written into a file and read in the same exact positions they were in when they were stored. I looked at the array solution with … |
| | Hello everyone, Currently, I am trying to make a smaller version of the famous Eliza bot. I have written a program that can understand and put out replies, but if I want to make it bigger then the code will be thousands and thousands of lines long. And all on … |
| | [CODE] #include <cstdlib> #include <iostream> #include <iomanip> #include <stdlib.h> #include <conio.h> #include <stdio.h> using namespace std; void printintromessage (); void getUserInput (char& Y); void calculations (const int& numofgamesinseries, const int& numofplayersonteam, int& i, int& j, int& k, int& l, char& Y); void PrintMax (const int& numofgamesinseries, const int& numofplayersonteam, int& … |
| | Hi everyone. Im new in C++, actually im doing my first project, and i have a few questions, if you guys could help me it would be awesome. :) In a method i have to create a .txt file, It have a parameter indicating the number of the file. But … |
| | Hi guys.. In my dialog, under void Class::DoDataExchange(CDataExchange* pDX), whenever i call DDX_Control(pDX, IDC_SOMETHING, m_VAR);, I got problem. After some digging, the problem is the function below. [CODE]HWND CDataExchange::PrepareCtrl(int nIDC) { ASSERT(nIDC != 0); ASSERT(nIDC != -1); // not allowed HWND hWndCtrl; m_pDlgWnd->GetDlgItem(nIDC, &hWndCtrl); //<---- hWndCtrl = 0 if (hWndCtrl … |
| | i want to make a key from keyboard toggle (on and off key ) that's for a polygon in openGl by using c++ this polygon appear when we press this key as solid and when we press this key again it appears wired can you help me thaxxxxx osha |
| | can someone show me an example of how you would initiate a variable and how you would fix a undeclaired identifiers. i am a visual learner so thats why i ask for an example. |
| | I have a bunch of code that looks like: [CODE] // Local block scope { ostringstream ostr; ostr.fixed; ostr.precision(2); ostr.width(20); ostr << foo->bar[trno]; SafeArrayPut2D( retArray, 3, i, (void *) ostr.str().c_str() ); } { ostringstream ostr; ostr.fixed; ostr.precision(4); ostr.width(22); ostr << foo->foobar[trno]; SafeArrayPut2D( retArray, 4, i, (void *) ostr.str().c_str() ); } … |
| | How can I access (get) the individual pixels of the data in an LPDIRECT3DTEXTURE9? Thanks. |
| | This program is to accept input from a user to select there own username and then a password which will be compared to the password KazzyB, and give an output saying Welcome, The only problem in it is a single error KB.cpp(18) : error C2447: missing function header (old-style formal … |
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