51,593 Topics
 | |
| | This code is giving me runtime error. Here, first I want to take a integer input which determine the number (n) of nodes in the graph. Then for n-1 time I want take two integer input which will give the adjacency information. [CODE] #include <set> #include <map> #include <list> #include …  |
 | I have some code in C++ that uses an std::vector of std::strings to store an array of strings. I need to convert it into C. I thought that I would just create c versions of the functions I need (vector.back,vector.push_back,string.operator+=) but am getting lost in the double pointers. Can anybody …  |
| | Customers of 65 years and over are entitled to discount of 20% on all purchases from an online shopping site. Write compile and test a program which will read in a customer’s age, and inform them whether or not they are entitled to discount on purchases. I have this so …  |
| | Pls help me on this. I really dont have an idea of solving this. Here's the question .. 1. Write a c++ program that generates the following series: 0 -1 4 -9 16 -25 36 -49 64 -81 100 and also this one 2. write a program that generates the … |
| | I was wondering if there is any way using the mingw g++ compiler to make code that acts like this: [CODE]#define myLanguageBlock(X) doMyLanguageBlock(#X) void doMyLanguageBlock(const char* code){/*this executes the code as if it were in another language, I have already written this function*/} int main() { myLanguageBlock( this is all … |
 | hey guys, k, already 1 month I'm "leaving" my self-study on C++ for certain personal reason, I just learned the C++ two months before also, not much... I still can type in code and remember how most of the keyword works(that I learned), but I'm losing my ability to "think …  |
| | Hi Gurus, I have an assignment am doing. The user should enter details of 5 students and return results on the screen.I have the code below and its return 1 error. Can someone kindly help me.With regards #include<iostream> #include <string> #include <sstream> using namespace std; int main () { typedef …  |
| | I wrote a little program to read soma data from a *.txt file. The content of the file is "5 , 10, 15". The program shall identify the numbers, e.g. "5" and "10" and "15". This works until the last two numbers. Unfortunately the program doesn't read the last two … |
| | So here is what i have done I did the basics of c++ and was quite comfortable with them Now i wanted to start with the allegro gaming library so i downloaded the library and linked it with my compiler i compile a program and it compiles fine but when … |
| | So, as follows I have a basic while loop. It's working fine, however whenever I enter something other than a number or EoF, it goes through the loop one time after I'm wanting it to stop. Say I enter 5, then EoF, it enters an extra 5, so I have … |
| | I'm working on a simple program in which the user types a sentence, the program iterates through the string that the sentence in stored in and alternates each letter's case, and then puts the formatted text into the clipboard. I know exactly how to allow input and change case/check if … |
| | Hello guyz! Im conducting a debugging contest... Im writing some questions... I wrote a code implementing virtual functions.. Im not sure where to include bugs here.. Can anyone help me add bugs to this code?? Please bugs must make people think.. THey must not just be syntactical errors.. Thank you.. … |
| | [TEX]Hi I'm into a code in which I have to Design a class named Account that contain: 1. Int data field named "id" for the account. 2. Double data field named "balance" for the account. 3. Double data field named annualInterestRate that stores the current interest rate. 4. A no-arg … |
| | hi all, here with I attach a programe written from using C++ language. I am new to C++. problem is I want to be a good programmer and I think I still do mistakes in witting programes. what I want is check my code and criticize my mistakes. tell me … |
| | /*PROGRAM TO PRINT SUM OF THE FOLLOWING SERIES - X + X*X/2! + X*X*X/3! + X*X*X*X/4!....n terms. I'm not getting the correct output. eg-for n=3 and x=2; compiler's ans = 4.66 correct ans = 5.3. HELP ME OUT...*/ [CODE]#include<iostream.h> #include<math.h> #include<conio.h> void main () { clrscr(); float x,sum=0; int n,fact=1,j,k; … |
| | Hello everyone, I'm having a problem with an assignment that I'm not sure how to fix I'm getting the following error: accountdb.cpp:55: error: cannot convert std::string to const char* for argument 1 to int strcmp(const char*, const char*) Here is my header file: [CODE] #ifndef ACCOUNTDB_H #define ACCOUNTDB_H #include "account.h" … |
| | I'm using visual c++ 2008. I don't know what namespace system and system::Glob.. are. I've never used "wchar_t" nor Console::Write. Is there a way to display unicode characters with the C++ that was taught to me in school? It looks that ASCII II is supported by using the char datatype … |
| | Can somebody help me figure out what I did wrong with my default constructor declaration I'm getting an error message no appropriate constructor available Thanks [CODE] TimeOff.h class TimeOff { private: string name; int id; NumDays maxSickDays; NumDays sickTaken; NumDays maxVacation; NumDays vacTaken; NumDays maxUnpaid; NumDays unpaidTaken; public: //default constructor …  |
| | What does this statement mean "[B]These functions (read(), readline(), readAll()) read a line of ASCII characters from the device, [U]up to a maximum of maxSize - 1 bytes, stores the characters in data, and returns the number of bytes read[/U].[/B]" I have used readAll() and readLine() it returns all the … |
| | Here is a c++ program I have been working on for an intro c++ class: [CODE]//hangman //Dylan Metz #include <iostream> #include <string> #include <fstream> #include <cstring> using namespace std; //functions //double index(); int main() { int const SIZE=22; char name[20]; char dash[SIZE]={" "}; char q; //The User's Guess int NumOfGuess=6; … |
| | I have: [CODE] class ANew { private: vector<CustomType> ArrayOfTypes; public: ANew() : ArrayOfTypes(0) {} ~ANew() {} ANew& operator ()(int I) { return ArrayOfTypes[I]; } operator const ANew* () const { return ArrayOfTypes; } }; [/CODE] But it gives me these errors: [ICODE]C++\Types.h|12|error: invalid initialization of reference of type 'ANew&' from … |
 | Hello, I'm trying to use the compiler optimizations for GCC 4.3.3. I used the following [URL="http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html"]LINK[/URL]as a reference. I'm mainly using the O2 and Os levels of optimizations. Could anyone please let me know if the order in which the options matters? Thanks in advance! |
| | I am studying the source codes of SGI STL and have many problems with it. I can't figure out the design choice of the iterator of SGI STL as follow [code] template <class _Tp, class _Ref, class _Ptr> struct _Slist_iterator : public _Slist_iterator_base { typedef _Slist_iterator<_Tp, _Tp&, _Tp*> iterator; #1 … |
| | Hello Hello Hello. At the moment i am working on contacting my web server through my browser. I have got it working. I can communicate with my web server by typing [url]http://localhost[/url] into my browser. [CODE] // fakewebserver.cpp : Defines the entry point for the console application. // #include "stdafx.h" …  |
| | Hello, I am going crazy with this application. I am trying to re-size and re-position all the window's controls as I re-size it and I don't get the expected result. I have my application source code here: [URL="http://www.devimperium.info/ResizeTest.zip"]http://www.devimperium.info/ResizeTest.zip[/URL] I create the project with CodeBlocks Please, give it a try and … |
| | Hello all. I have made a web server in c++; I am able to type in my browser [url]http://localhost[/url] , this will contact my server and make a connection i can add a variable onto the end separated with a ?. I want to send messages to my web server …  |
| | Hi, I have a grid, which contains cells that have several different properties. [CODE]struct fluidProperties1 { float foo; float bar; };[/CODE] and I create the grid as follows using a template [CODE]Grid2D<fluidProperties1> grid1;[/CODE] Now, I want to pass the array formed only by the values of foo, and not by … |
| | ok so basically my code is complete but I keep getting an error on one of my brackets and it says I need to put a ' ; ' behind "int LinearSearchArray ( const int list[], int numEless, int value)" and when I do that it brings up more errors. … |
| | Hi, I tried to debug my code using printf statement... But previously it was working and today when i tried the same it was not working.... I tried the properties option and it is all the same as before..can any one help me.... |
| | Hi folks, I am learning operator overloading concept in c++, wrote sample program to test overloading of unary operator '!' and '-'. Code will work if i use them as friend function but not for member function. Can anybody tell where am i going wrong in function bool operator!(const co_ordi … |
| | Write a statement that declares and stores the elements of the following array into a vector object: char vowels[5]={'a', 'e', 'i', 'o', 'u'}; I think this is what I need, but I want to verify this. [CODE]char vowels[5]={'a', 'e', 'i', 'o', 'u'}; vector<vowels> vowelsList (vowelsArray, vowelsArray +5);[/CODE] |
| | [code]#include <iostream> #include <vector> using namespace std; char img[30][15]; char x = 'X'; int dotLoc[24][2]; int dotNum = 0; int ret[4]; int curDie = 0; int dieNum = 0; int der = 0; vector<int>* readDice(vector<string>&); int dieDots(int, int); void findDots(); bool adjX(int,int); bool traverse(int,int,int,int); vector<int>* readDice(vector<string>& anImage) { // TODO: … |
| | I'm trying to learn hash tables as I am hearing that it'll be utilized a lot in the future (advanced programming). My book, however, does not include any lessons on Hash Tables. Any good references for someone trying to learn Hash Tables? Thank you!! |
| | I tried to write the function myself for a switch statement that would take a char and multiply it by a certain amount and then return the total. I'm a little confused on how the object gets passed to the case function. But here's what I got. [CODE] #include <iostream> …  |
| | Hi, I need help with my assignment. Basically I have to make a html page and have the output display in a .cgi file. I am able to change the font and colors in the html page but the output of my cgi file comes out in black font. I … |
| | |
 | I'm trying to compile a VC++ 2010 solution of two Static Library projects and I just get this (it's the build log): [code] 1>------ Build started: Project: df_debug, Configuration: Debug Win32 ------ 2>------ Build started: Project: common, Configuration: Debug Win32 ------ 1>Build started 14/02/2012 10:51:14 PM. 1> 1>Build FAILED. 1> … |
| | when will the expression (std::cin>>buff) evaluate to false(0)? I have been trying to take input until empty string is entered(simply press enter) ? Is there any other way to achieve this? |
| | I discover a performance pitfall of vc2010, I compile it by release mode(O2).The results are pretty unacceptable at the first time. [code] #include<ctime> #include<iostream> /* * This is a small performance pitfall I discover from vc2010, * for simplicity, I didn't separate the header file and source file. * At … |
| | Hi all, any help would be greatly appreciated. This program is supposed to allow the user to read in a txt file with ingredients for recipes. We were asked to use the fstream and to use functions to read in the info and display it. I am new to this … |
| | When I compiled this program... [CODE]#include<iostream> using namespace std; class base { public: virtual void show() { cout<<"\n Base class show:"; } void display() { cout<<"\n Base class display:" ; } }; class drive:public base { public: void display() { cout<<"\n Drive class display:"; } void show() { cout<<"\n Drive …  |
| | Hi I came accross a code and i din't understand it Template.h [CODE] #define FRIEND_NEW template<class T> friend inline T* ::safe_new(const char*,int); template<typename T> inline T* safe_new0(const char* file, int line) { T* ptr = new T(); return ptr; };[/CODE] A.h [CODE] #include "Template.h" class A { FRIEND_NEW protected: A(); …  |
| | Hi, I'm a real newbie at C++, and I'm having a ton of trouble. You see, What I need to do is convert an std::string into a system::string^ so I can display it in a textbox, and I haven't found any way of doing so :icon_confused: . I always get … |
| | I have a son who's in grade 8 and he is show a great deal of interest in computer programming. What is a good book for him that is easy to read, understand and detailed? Money is not an issue. Thanks |
| | Hi there. I have a few hundred/thousand macro enabled spreadsheets that need to be uploaded to a database. The spreadsheets have a button that copies the data over to the database and it prompts the user for a username and password in order to do so (same for all files). … |
| | write C++ program to print the sum and average of 1 to 10 using for loop? |
| | so i have the following code, it inserts a number to a list and then i call my sort function which is below this function, the problem is that my sort function takes forever, is there a way i can implement my insert function so that everytime it inserts a … |
| | I've tried for some time to make the following code run properly. The problem is in the comparison function of sort(comp). It compares 2 doubles but in some cases it causes the program to crash with the message "Debug Assertion failed! Program: retrace.exe File:c:program files (x86)\microsoft visual studio 10.0\vc\include\algorithm Expression:Invalid … |
| | I'm writing a program where I take in a file and need to grab strings of n length (n = 3, 4, 5, 6 ,7 or 8). The issue I'm having is I need to grab these strings in a specific window. So if n = 3 I need to … |
| | How do I do assembly code with the mingw-g++ compiler. All the websites I checked say that this should work: [CODE]int add(int a, int b) { int c=0; asm("mov %[aVal],%eax;add %[bVal],%eax;mov %eax,%[cVal]" : [cVal] "=i" (c) : [bVal] "i" (b) : [aVal] "i" (a)); return c; }[/CODE] But instead I … |
The End.