51,593 Topics
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| | This problem was from the book C++ Primer Plus Chapter 4 #8. The point of the code is to create a structure and use the new keyword to dynamically create a new structure. This problem makes me alter my code for the previous problem in the book so that I … |
| | [CODE] #include <iostream> #include <cmath> #include <iomanip> using namespace std; int main () { int numb, sum, divis3, divis5; numb = 20; sum = 0; double value = sqrt(numb); cout.setf(ios::fixed,ios::floatfield); cout << setw(8) << left << "NUMBER" << setw(8) << left << "DIVIS3" << setw(8) << left << "DIVIS5" << … |
| | i have the next code that compiles without problems but when I run it after I put in the input data it gives me the next error: line 128 vector iterator not decrementable I use visual c++ 2010. [CODE] #include <iostream> #include <iomanip> #include <vector> #include <iterator> #include <algorithm> #include …  |
| | The basic structure of the program is this: 1. issue an interactive prompt for the user to enter a non-negative number, 2. verify that the input is indeed non-negative, or that the user wishes to end the program, 3. calculate the square root of the input value, using the method … |
| | Hello, I took a C++ code from a colleague which uses OpenCV for image processing, and when I try to debug the program using Visual Studio 2008, as soon as the black output window pops up, I get the following error (Windows error, not code error): [B]"The program can't start …  |
| | With respect to the following code segment, what should be the n value in different classes, e.g., what is a.n, b[2].n, and c->n How to analyze them? [CODE]#include <iostream> using namespace std; class CDummy { public: static int n; CDummy(){ n++ ;}; ~CDummy(){ n--; }; }; int CDummy::n = 0; … |
| | The Assignment is: Write a class named Car that has the following member variables: yearModel, make, speed. In addition the class should have the following constructor and the other member functions constructor-accept the cars year model make as arguments. an assign to the objects year, make also assign speed 0 … |
| | The output of the vector that you helped me make is a little hard to read. Can you help me make it a little more readable like: Input: Enter number of different sizes: 5 and the inputs are : 35 x 2.36 23 x 1.23 12 x 4.23 16 x … |
| | Here is my code: [CODE]#include <iostream> #include <fstream> #include <iomanip> #include <cmath> #include <time.h> #include <assert.h> using namespace std; int main() { // = (num3&&num4) - (num1&&num2); // save this calc for later: hrIn + (hrOut/60.0); // same thing = num3 + (num4/60); // write an alogorithm to establish the … |
| | I'm trying to create an array of my object I made, and basically the object doesn't have a default constructor, only a self made one. I've made my object array in the header file e.g. Object myObject[4];, however doing it this way requires for me to have a default constructor, … |
 | My professor has working with very large number. We bring them into our project through a file stream (.txt). I get the MATH behind using 3 arrays to add, subtract, and store the sum of the numbers. I get that you can do a "x-'0'" to convert the char to … |
| | well,this is my college assignment question.the question ask us to write a program that can compare 3 number,who is the biggest and smaller.the output should be like this: Enter 3 numbers. Number1: Number2: Number3: Main Menu 1)Find the biggest value among the 3 value you have enter juz now. 2)Find …  |
| | I don't know how to get the program to display properly any tips? Also would anyone guide me on how the logic works for deallocating all this memory please. [CODE]#include <iostream> #include <cstdlib> #include <windows.h> using namespace std; struct Entry { char name[23]; int age; Entry *next; }; // Prototype … |
| | 1) Write a function that merges two instances of the List ADT using the following specifications: MergeList (List list1, List list2, List& result) • list1 and list2 have been initialized and are sorted using function ComparedTo • result is a sorted list that contains all of the items a. Write … |
| | So all i have to do is clean it up but cant find the source to the actual error. Heres my code: [code] #include <iostream> #include <fstream> #include <string> using namespace std; bool isVowel(char ch); string rotate(string pStr); string pigLatinString(string pStr); int main() { ifstream infile; string newstr; int length; … |
| | i have this function that should compare values and return a string based on input from the main function. However it returns no value at all does anyone see and issue with it? have checked all the input it is getting the correct values highestMontName and averagedMonth are declared globally … |
| | How do i get the loop to go back and prompt using for a valid number? #include<iostream> #include<conio.h> #include<iomanip> #include<string> using namespace std; int main () { string firstName; string lastName; int score1, score2, score3, score4, score5; float totalpoints; cout<<fixed<<showpoint<<setprecision(2); cout<<"Please enter the student first and last name: "; cin>>firstName>>lastName; … |
| | I have a class that stores all of my variables and functions (for our purposes, DataClass), and a few different windows form classes that use the public variables and functions in DataClass. I need to keep the values of the public variables in DataClass until the program closes. I set … |
| | What is wrong with my code? My fps time is not working.I found two errors in my code. Error 1 error C3861: 'install_timer_ex': identifier not found. Error 2 error C3861: 'textmode': identifier not found. [CODE]#include <allegro.h> BITMAP* buffer = create_bitmap(480,480); volatile int fps = 0; volatile int avg_fps = 0; … |
 | Source: [CODE] #include<Windows.h> #include<conio.h> int main() { char stop = static_cast<char>(getch()); while (stop != 's') { // 'S' needs to be WIN+S keybd_event(VK_LWIN, 0x5b, 0, 0); // Press WIN KEY keybd_event(VK_LEFT, '0x25', 0, 0); // Press LEFT KEY keybd_event(VK_LEFT, '0x25', KEYEVENTF_KEYUP, 0); // Lift LEFT KEY } keybd_event(VK_LEFT, '0x25', KEYEVENTF_KEYUP, … |
| | heyy..plz suggest me new C#.net project topics other than managemant systems..  |
| | Hello, I have a program that uses getchar() and slightly confused and tried googling and it made it worse [ICODE] cout << ">What is the expected letter <<"\n>"; expectedLetter = getchar(); putchar(expectedLetterl); string exletter = expectedleter + post; cout <<">Do you wish to enter another letter (Y/y)/(N/n)\n>"; repeatIn = getchar(); … |
| | im wondering if any1 can send me the function that evaluates the value of a postfix expression in c++<<using stacks>>... i really need it as soon as possible.. :sad: |
| | hi everybody. Im very well a beginner and I cant quiet grasp classes. I found that this topic is all over forums and I have decided to give it a whirl and I am stuck. Would anybody out there help? |
| | hi all, I am trying to create a pointer to a member of a struct and then do a boolean comparison to see if there is currently anything in that member. here is what I have so far: card* openPtr = opencells; char* rankPtr; rankPtr = (*openPtr).rank; cout<<" Free Cells … |
| | The subject of my bachelour thesis is "Solving linear programming problems using parallel algorithms". I will create a library for solving different kinds of problems (simplex, branch and bound and so on). I want to use OpenMP or PThreads locally and OpenMPI in the network. Which one would you recommend … |
 | Just to clarify, the text I'm reading defines the lifecycle of a program as: -idea -plan -source code -object file -executable. In gaming terms would this be comparable to: -an Italian plumber goes on an adventure to save a princess from evil turtles and mushrooms. -sketch out level designs. Write …  |
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| | i'm trying to make a password system for my program. a user will input upto 20 chars, and if the password is correct, load the main program and if not, loop until the user gives up or enters the correct answer. here is the code [CODE] void Password(char pass); int … |
| | It may have only been Visual C++ 6.0 or something, but I think I remember needing to add curly braces after a switch's case label to declare variables, is this still true with VS2010 and C++? ex: [code] switch( 1 ) { case 1: { int a; //<-- ok } … |
| | Im currently wanting to open a file on my Hard Drive, and be able to scan it's contents to see if it has any bytes that match a specific pattern of bytes which i have stored in a byte array. Im curious as to how i can do this? will … |
| | What is wrong with this and how do I fix it? Thanks. [CODE] template<typename T> class Array { public: Array(unsigned arraySize): data(0), size(arraySize) { if (size > 0) data = new T[size); } ~Array() { if (data) delete[] data; } void setValue(unsigned index, const T& value) { if (index < … |
 | I'm trying to make a program where you enter the number you want to find primes up to which then lists all the primes up to that number... But I enter 100 then it just sits there... Here's my code so far: [CODE]#include <iostream> #include <cmath> int prime(int); int main() … |
| | could someone please explain to me the differences of these languages (C, C++, C#) and when i would use them. (i know a little C++) |
| | I have read many different threads about how it is not possible to delete values from an array, but I need to find some way to do this. I am making a program that involves a bottom up approach algorithm where it pairs off data segments, finds the best segments …  |
| | I'm trying to write a program which will generate templates in html.. I try to make a menu in visual c++, rest of code was written in c++ (console). so I have 2 problems... [B]1st PROBLEM[/B] I designed nice clean menu with drop-down menu containing 3 options AVAILABILITY DEGRADATION UNAVAILABILITY … |
| | I have the following code: [CODE]for (int w=0; w<10; w++) { //some lines of code unsigned long num = x.to_ulong(); cout << "Decimal form is: " << num << endl; } [/CODE] Now what I want is, to make a matrix which will have these values of num, column wise. … |
| | Hey guys , i need some help in understanding this coding. This is a client server code which i got off the internet . The problem i am facing is that when you run the server , the server will continously wait for incoming connections . I would like to … |
| | Dear experts, In my application, I am using a custom control that is a GroupBox and a CheckBox instead of a common caption. I got the control here: [url]http://www.codeguru.com/cpp/cpp/cpp_mfc/article.php/c4149[/url] I had to change the code to allow the checkbox to have multiline text: [CODE] CRect rc; GetWindowRect(rc); // Get the … |
| | [CODE]std::vector<std::vector<unsigned long> > matrix(15); // 15 rows typedef std::vector<std::vector<unsigned long> >::iterator it_type; it_type row = matrix.begin(); for (int w=0;w<10;w++) { //some lines of code unsigned long num = x.to_ulong(); cout <<"Decimal form is: " << num<< end; // if we've hit 15 items in the current row (i.e. 15 columns), …  |
| | Here's a defined enumeration: enum shipCost {FIGHTER_COST = 25, BOMBER_COST, CRUISER_COST = 50}; Then they do this which I don't understand: shipCost myShipCost = BOMBER_COST; My question is why don't you just do the following instead? int myShipCost = BOMBER_COST; |
| | Hey i am beginner and i read a book about c++,and i like to do all the exercises alone until i find alone the solution. but one of the topics that give me a hard time is recursions. i am on an exercise with the following code. [CODE]#include <iostream> using … |
| | Im getting this error while im working on my pig latin code and have no idea what it is referring too. so here is the error and my code. ill specify the piece of code that is erroring. [code] #include <iostream> #include <fstream> #include <string> using namespace std; bool isVowel(char … |
| | Thank you for your help so far.I try now to move on with my vector but now comes the hardest part. All the values that the float vector receives must combine somehow that the value of their addition do not overcome 12. So in other words even if I have … |
| | I promise I read the Read This First post and also searched for relevant threads, but I didn't have any luck. I'm taking my first C++ class, and the instructor hasn't been much help when it comes to fundamental things like what compiler we should use, where to get it, … |
 | I Created a Look_up table class but when I test it with sin() and cos() it is actually slower than stdlib math's sin. This surprises me by a lot. [CODE] inline double MATH_TABLES::GetSind(double& value) { return mp_Sind[(static_cast<int>(value/m_SinPrecisiond)]; } [/CODE] mp_Sind is simply an array of doubles. This is the non-Lerp'd … |
| | I'm a college student, about to have an associates degree and start working on my Bachelor's for CS. I have a project that I've been working on for a while now, and I'm thinking about making it open source, and hosting it on sourceforge. The reason I would do so, … |
| | Hi, I've just installed netbeans, cause I found out I need to work with C and windows doesn't allow the use of pid_t and fork(). Awesome Job, Gates. Anyway I've found this pretty compiler which is NetBeans. In pair with cygwin it should work out all the C stuff I …  |
| | Here is my problem: Write a program that reads in a text file and converts it to pig Latin. i.e. if the first letter is a consonant, move it to the end and add “ay” to the end, if it is a vowel add “way” to the end. Here’s an … |
| | Hey all, A quick question, i've been picking my brain and browsing the net for a few hours now and still can't get any further. I have a simple C# windows form which acts as a login, but also has a form to change the password of a user. When …  |
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