51,593 Topics
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| | What is the meaning of using dynamic_cast without any error handling? Like [code] struct base { virtual void testing() { std::cout<<"base"<<std::endl; } }; struct derived ： public base { virtual void testing() { std::cout<<"derived"<<std::endl; } }; int main() { base baseInstance; derived derivedInstance; base *bp = &derivedInstance; base &br = … |
 | Hello, I am having an issue with C++. I am relatively new to this language. The issue I am having is that I am unable to use a variable declared as private in my class. Definition: [code] class Matrix { public: Matrix(void); Matrix(int rows, int cols); Matrix(const Matrix& m); ~Matrix(void); …  |
| | [code] void testRR(std::string &A); [/code] [code] void testRR(std::string &&A); [/code] Which one is better? && is more flexible than &, should I choose && rather than &? Thanks |
| | Ok, so basically I have an assignment in which I have to determine if what the user typed in is a number between 0-9, a letter or a symbol. The commands I can use are: [CODE]cout endl system("pause") system("cls") #include<iomanip> setw(#) setfill('ch') "\t" cin getline(cin,s) bool char int double string …  |
| | I was wondering which language should learn. I do not want to be a programmer for a job(at the moment I am a young teen) in the future, I would like to be a physicist. In the meantime though I would like to learn a programming language. I want to …  |
| | [CODE=C++]void List::remove_last() { if(first == NULL) { first -> data = ' '; } else { Node *newnode; newnode = new Node; newnode = NULL; newnode -> data = last -> back -> data; last = newnode; } }[/CODE] am I doing something wrong? I'm trying to remove the end …  |
| | [CODE] #include <iostream> #include <iomanip> // set width and decimal #include <fstream> // use file input and output #include <cstring> // use strings using namespace std; ifstream infile; ofstream outfile; string input(string, int); string copy(string, string, int); string breakup(string, string, string, string, int); string capt(string, string, string, string, int); string … |
| | Hi, I need to draw a right triangle, based on the height and the base of it. An Isosceles one is easy to draw, but a randomly chosen relation between the height and the base (which gives me a right triangle other than 90, 45, 45) needs to be based … |
| | I need to write a program, which prints out all the prime numbers between two numbers. The first input specifies the number of test cases, followed by the limits. Here is an example.. [QUOTE] Input: 2 1 10 3 5 Output: 2 3 5 7 3 5 [/QUOTE] I wrote …  |
| | Hi, I'm new here I searched for any possible way to fix my issues, but I have not found anything that I can understand, so I figured I would post my code here. In my C++ class I was asked to take a craps program and modify it to take … |
| | MY problem is ..... Given an input 'n' came from the user and display a pattern. but my code is very long .... my code is only for 1-10 numbers i need to display any numbers that input of the users can u give me some short code or advice … |
| | Hello I need help figuring out how to write a loop program that behaves a certain way, I have been beating my head off of walls trying to figure this out and it is probaby so easy.. This is the expected behaviour: $ ./a.out Enter some text on 1 or … |
| | Hello I am attempting to write a program that will convert temperature from c to f and vise versa. However I need this program to stop when choice == 'q' and i am having a horrible time with it. here is the code that i have been working with. any … |
| | Good Day Everyone here is my code so far [CODE] #include <graphics.h> #include <stdlib.h> #include <stdio.h> #include <conio.h> void vp(int x,int tc,int bk,char *text); void square(int x,int y,int size); void main() {//=========================================================== int gdriver = DETECT, gmode, errorcode; initgraph(&gdriver, &gmode, "C:\\TC\\BGI"); //------------------monitor-------------------- setbkcolor(0); setcolor(15); square(300,160,150); square(300,160,148); square(300,160,130); square(300,160,131); setaspectratio(2,5); int … |
| | Program runs fine with me, the cout's work. IDK what this means every cout from line 17 to 71, and the system ("pause") on line 72 are all warning marked as ambigious. It started happenning when i put the "while (occupiedRooms > rooms)" in. I think thats when the errors … |
| | Ok, so basically I want a program which can determine if what the user typed in is a number between 0-9, a letter or a symbol. The commands I have to make it with are: [CODE]#include<iostream> #include<iomanip> setw(#) setfill('ch') bool char int double string #include<string> #include<cmath> #include<windows.h> → directiva utilizada …  |
| | Hello all, I have a assignment for school that I am having trouble with. I have to write a program that will list all primes numbers of an inputted number. I have the code and it compiles with no errors, but when I run it after i input the number, … |
| | So I cant get the division to work on my c++ homework. This is a diceroll game and im trying to get sum1=num1/diceRoll to get the percentage of # of times divided by the amount of time the dice is being rolled. It keeps giving me 0 because I assigned … |
| | These are the errors the compiler is giving me on these lines od code - any help understanding or fixing this issue ???? \extpersontype.h(35) : error C3646: 'extPersonType' : unknown override specifier \extpersontype.h(37) : error C2091: function returns function \extpersontype.h(44) : fatal error C1903: unable to recover from previous error(s); …  |
| | 1) Write a full program for the bubble sort algorithm. User is required to enter specific input numbers and the program will be able to sort the given numbers in ascending order. Write down in a table the time (according to your system clock) that it takes for the program … |
| | This is code for building a white window in direct X. The problem is, when I debug, I get this error. 'Chapter1_DirectXWindow.exe': Loaded 'C:\WINDOWS\System32\uxtheme.dll', Cannot find or open the PDB file The program '[2536] Chapter1_DirectXWindow.exe: Native' has exited with code -1 (0xffffffff). [CODE]#include <Windows.h> LRESULT CALLBACK WndProc(HWND hwnd, UINT message, … |
| | [CODE]// Including the libraries to be used #include <stdio.h> #include <stdlib.h> #include <string.h> // Defining the End of line #define EOL '\n' //Declaring Global variables (for the sentence and the output sentence- final) char sentence[100]; char final[100]; int i,j,ans; int start() // Defining the start function { printf ("\n"); printf … |
| | i've seen many programs using printf( ) for outputing(probable ported from C) but anyway, is there any difference between printf and cout? also i've seen many functions(expecially in windows.h) using w_char*(wide char string) as arguments or return value(and it bugs me because it makes difficult to use with strings) what's … |
| | 1) what exactly is the difference in a constructor if you put reference on it? example[CODE]ConstructorX(string first):firstName(first)[/CODE] with [CODE]ConstructorX(string &first):firstName(first)[/CODE] 2) [CODE]const Array &operator=(const Array&)[/CODE] the first const what exactly means?the const in the parenthesis is that the object is constant if its at the end means the function cannot … |
| | I have a map that is not returning the correct number. First it did, then it didn't now it's just messed up. Any help is appreciated.Thanks. [CODE]struct file_data { std::wstring sLastAccessTime; __int64 nFileSize ; }; int GetFileList(const wchar_t *searchkey, std::map<std::wstring, file_data> &map) { WIN32_FIND_DATA fd; HANDLE h = FindFirstFile(searchkey,&fd); if(h … |
| | Hi Guys. Random no.'s always bother me.So,I want to start a discussion over their uniform distribution. Given : rand5() which generates randomly distributed no. from 1-5. To Code: rand7() which generates randomly distributed no. from 1-5. You have to give code using rand5() as well as without using it. Thanks, |
| | I am using VB.net to develop an application, but there needs to be applied to the dll technology. So come here to seek help. First I will describe the features I need this dll I want to monitor an application's window to get in on a PSD_ENVSTAMPRECT the lParam value. … |
| | I have looked around the website using the search and have seen old post so I am posting a new question most likely to an old answer. I am trying to read data from a file into an array and then pass it on to a function. I also have …  |
| | I've been away from my C# programming course now for months and am very rusty to say the least. My assignment calls for the creation of a MDI text editor project. I am currently having trouble in coding such that the child form containing a rich text box is recognized …  |
| | how can I sleep my program without sleeping others (or making them slower)? I am using a windows application. here is a fragment of my code: [CODE] //#includes... int WINAPI WinMain (HINSTANCE hInst, HINSTANCE hPrevInst, char * cmdParam, int cmdShow) { MSG msg; int status; Window myWind(SW_SHOW,"Name",150,120,500,0); for(int i=0;i<550;i++){ myWind.setLocation(i,i); … |
| | So I'm trying to achieve this myself, but I decided to ask on this forum to see if anyone knew about some obscure project on sourceforge or something that did exactly this: I need to store very large numbers and perform arithmetic on them. I am storing the values in …  |
 | I'm not exactly sure what is wrong with my code. It will run and then it stops without completing the maze. Any ideas? Thanks in advance. Here is my code: [CODE] #include <iostream> #include <ctime> using namespace std; void mazeTraverse(char [][12], int, int); int main() { char maze[12][12] = { … |
 | [CODE]#include <iostream> #include <iomanip> #include <string> #include <cmath> using namespace std; int main() { double accNum; string scode; string scodeab; double minu; double minam; double minpm; cout << fixed << setprecision(2); cout << "Please enter account number: " << endl; cin >> accNum; cout << "Please enter service code: P(for … |
 | Anytime I try to compile the code below I get the following error message. E:\Users\Cosman\Desktop\C++ PRACTICE\read2.cpp|52|error: no match for 'operator<<' in 'std::cout << m' How do I correct this? [CODE] #include <iostream> #include <fstream> #include <cstring> using namespace std; class A { private: char name[50]; char gender[8]; int age; public: … |
| | I have multiple errors in my code that I was just working on, the errors are as follows: Here is my build log: monsters.h:11: error: storage class specified for field `enemyattack' monsters.h:11: error: ISO C++ forbids initialization of member `enemyattack' monsters.h:11: error: making `enemyattack' static monsters.h:11: error: ISO C++ forbids … |
| | I'm using C++ VS 2010 in Win7. I'm trying to delete a zip. and/or txt. file that is less than a minute old. However; heres the rub. I don't know the name or location of the file. Only that I want to delete it by extension and a timestamp of … |
| | Here is my code I am working and I cant for life of me get it to print if the year entered is a leap year or not. Please help me fix this.[code]#include <iostream> using namespace std; class dateType { private: int dMonth; int dDay; int dYear; public: void setDate …  |
| | Hey Guys, I am trying to call a function in my DDL file [code] char DLL[1024]; _getcwd(DLL, 1024); strcat(DLL, "\\LoremIpsum.dll"); HMODULE Test = LoadLibrary(DLL); PluginEntry Entry = (PluginEntry)GetProcAddress(Test, "PluginEntry"); Entry(); FreeLibrary(Test); [/code] yet on Entry(); I get an access violation in 0xC0000005. What am I doing wrong? Thanks |
| | Hi I have a assignment about formatting C this is the assignment print_patterns(int i, double d) - Print 10 lines as specified below. * Lines 1 and 2 are fixed patterns with 20 characters each. * Line 3-6 are for integer i (sample value 123). * Line 7-10 are for … |
| | For you guys, what is the best C++ Compiler?  |
 | I have this problem: [CODE]struct Position { float x; float y; float z; }; bool CheckCollision(Position *vertices, int numvertices, Position start, Position end) { //return true if there was NOT a collision with the polygon defined by the vertices and the vector defined by the two positions. }[/CODE] I dont … |
| | i have this question in mind since i first found out that you can declare and array like this [CODE] <type>* nArray [/CODE] how does the compiler how much storage to allocate? i've heard that it doesn't allocate any storage, it just points to some address and when you use … |
| | hi people I have a project that requires me to use time.h in animation. can anyone show me a simple code of animation using time.h??? |
| | How can you combine different c++ programs into one full software. I am using the Code::blocks IDE |
| | Hi all, I'm new to c++ and currently i need to write a program to open csv file and store all data into a vector of double. After trying my codes for few days, i have encountered a problem. I couldn't load all columns of csv data into an array.Please … |
| | hi guys. there is this c++ program i have wrote and i would like to use time.h in order to manipulate the way strings are going to be displayed in my program. the lecturer said it is possible but the problem is i just dont know how to do it. … |
 | Hello.I've been looking for a free C++ compiler for windows which supports the new standard features but i had little luck so far.Does someone have any knowledge of one? Thank you in advance. |
| | i really need a GOOD socket tutorial, i've followed some of them from google but they aren't complete, i know that socket programming is forked into many categories, basically i am interested blocking & non blocking sockets, synchronous & asynchronous sockets(used with select() and FD_ISSET macro etc) PS: i know … |
| | ok this is one of the many things I don't trust google on. What is a good new compiler (C++ and D would be nice) for Linux? Kubuntu PS Is the system() function universal as in it will do the same thinge in Linux Windows and OSX |
| | Ok so I want to have the user imput a name of a file to decode it. How would I do that? EX: cin>>fill ifstream in (fill) |
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