49,761 Topics
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| | I'm re-kindling some of my C++ theory and was working through a C++ SringBuilder class I found on the net. I understand it all except the 2 operator methods. (See listing below). Can anyone explain what these operator methods are for and how and why you would impliment them. class …  |
| | I have to write a program that accepts data for a class and then ouputs it in the main. so far i have this. #include<iostream> #include<string> #include<fstream> using namespace std; ifstream infile; class animal { string species; string family; string phylum; string desc; static int count; public: bool readIN(const string … |
 | hi everyone! I'm working on project which Generates certificates for different students. The interface takes the input of Name, College, Secured position and generates the certificate... but I want to generate all the certificates at once. So, to avoid overlapping of the file names, i want to generate different file … |
| | ---------------------------------------------TSet.h------------------------------------------------------ #include <iostream> using namespace std; template <class V> class TSet { public: TSet(); TSet(int size); ~TSet(); void add(V new_item); void remove(V item_to_remove); int num_of_items(); bool isFull(); bool is_item_in_set(V item); friend bool operator==(const TSet<V>& left, const TSet<V>& right); friend bool operator!=(const TSet<V>& left, const TSet<V>& right); friend ostream& operator<<(ostream& outs,const … |
| | I can not figure out the problem with my program. I am extremely knew at this. The error I get is at the last ' } ' of the program it says "Error expected declaration before '}' token" please help? This is my code #include <iostream> //Header Files #include <fstream> …  |
| | Hello, this is my first post here so please let me know if I'm doing something wrong. I have a linked list project that I'm having a little trouble with. I was given LinkedList.cpp (main) and that can't be changed. I had to use a completed program that we did … |
| | Hello. I'm currently taking a computer science course and I'm doing a little research paper about C++. I honestly don't know C++ too well yet. But I have a few questions that I would like to ask and feel free to post your opinions. I hope this is the right …  |
| | # MERSENNE PRIMES # ## There is an integer n. Find primes that is < than n (p < n) and they can be expressed in the form 2^k-1. ## Hey! I'm done with connecting parts together - all works fine! But I need to replace (pow(2,p)-1) because my professor …  |
| | Hey guys I'm having some trouble figuring out what is going on I'd appreciate if anyone could help here is the instructions. 5. The SalesEmployee constructor a. uses a_commission and a_sales arguments to initialize the commission and sales member variables respectively b. calls the SalariedEmployee constructor and passes to it … |
| | anyone please guide me to create a exe program in visual C++ 2005. Thank you |
| | I am making a guessing game for my programming class, and i have it all working correctly, except that when you run the program the number it guesses is always lower. Are my math equations wrong? what do i need to change? There are no error messages. //P //Project 8.4. … |
 | I've managed to generate a Pkg-Config makefile using MSYS in the configure process and when I've tried to build it I've got the below errors. I'm thinking there might be a basked meaning for these kinds of errors. Any clues as to what it is. This is for pkg-config 0.27.1 … |
| | Hi, Iam using ReadDirectoryChangesW function in winAPI to know the access details of a file in a directory.the code is as follows... HANDLE h,hDir; ifstream myfile1; ofstream myfile2; char *buff="",temp[256]=""; int i,length; Entry *head=NULL,*tail=NULL,*e=new Entry(); hDir=CreateFile((LPCSTR)"C:\\sample\\example.txt",GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL); h=FindFirstChangeNotification((LPCTSTR)"C:\\sample",FALSE,FILE_NOTIFY_CHANGE_LAST_WRITE); BOOL b=ReadDirectoryChangesW(hDir,buff,1024,FALSE,FILE_NOTIFY_CHANGE_LAST_WRITE,NULL,NULL,NULL); DWORD d=GetLastError(); but i got the error 998 memory access violation.plz … |
| | Hello everyone. I have a few questions about this project that I need to code. And If you can please show me how the code should look I would very much appreciate it. Write a program that can sort integers, decimals, and characters from ascending and descending orders. The program … |
| | I need help with a program that I am working on. Basically the program right now takes a decimal number and converts it into whichever base I choose. What I need it to do is accept other inputs initially (binary, hexa, octal) and convert between whichever I choose. Can anyone … |
| | #include <iostream> #include <windows.h> #include <fstream> #include <string> using namespace std; class Entry { public: char name[50]; int id; float sal; bool b; Entry *next; void clear(Entry *head,Entry *tail) { while(head!=NULL) { head=tail->next; delete tail; tail=head; } } }; int main () { ifstream myfile1; ofstream myfile2; char *buff="",temp[256]=""; int … |
| | Trying to make my function that takes in an array and arrayLength and outputs a linked list equivalent to the array.Any help would be greatly appreciated! Node* array2List(int A[], int n) { Node* p; Node* q; q = NULL; for(int i = 0;i<n;i++) { p = new Node; p->val = … |
| | I's running this on visual c++ and it runs without error. However, when I tried to run this on Linux, it kept giving me this "segmentation fault" message without any output. There is no pointer and is a quite simple program so can anyone please tell me what is wrong?? … |
| | Hi, I wonder if this namespace is possiblet to use. However I cant find ::Messaging in System::Windows ? I do use this namespace in Silverlight to mention. Is there a assembly etc to add to be able to use this? System::Windows::Messaging |
| | I'm trying to think of a way to compare a string of multiple words and take each individual word to a dictionary. I have a binary search already coded but it's just breaking the string apart I'm having trouble with. I have to use C-Style Strings (character arrays). For instance … |
| | I'm trying to find the highest score from 6 scores taken from a text file. The code I have works, but it looks so inefficient. There should be a way to do it with a for loop, for (int i = 0; i < count; i++) if (max > score) … |
 | I need some serious assistence with finding the solution to this problem, it has plagued me for some time now and im just not getting the big picture. I need to move the elements in a 2d array according to the user input, but the way i have figured out …  |
| | #include <iostream> #include <string> #include <fstream> using namespace std; //Listans struktur typedef struct lista{ string namn; string ort; lista *next; }; int main(){ int antal = 0,antalspara=0,antallika=0,antalPerson=0; int langd; string namn, ort; bool bfinns; ifstream fil; string filnamn; //För första listan lista *afirst, *alast, *node, *itt; afirst = NULL; alast …  |
 | Hi there, I have an array of unsigned chars that hold hex values, I’m interested in values [5] and [6] of the array. Say [5] = 0x5b = 0101 1011 and [6] = 0x7b = 0111 1011 I'm trying to get all of [5] and the first half of [6], … |
| | can anyone help me? i got problem count the monthly installment. //class class vehicle { public: char model[20], color[20], brand[20]; float price, deposit, rate, monthly_installment, newprice; int term; public: void calculate_installment(); }; class car:public vehicle { private: float installment, newprice; public: void calculate_installment(); }; //main program #include <iostream> #include <string.h> …  |
| | I cant figure out why my second switch stament is not working. Can you please help? I am still new at this still. // Project 8.4. Guesses the number the user enters between 1-100. #include <iostream> #include <ctime> using namespace std; char H,L,Y,N; int UsersNum, YesNo, HighLow, Re_Use; int n … |
| | #include<iostream.h> #include<conio.h> #include <stdlib.h> int main() { int *ptr[5]; int a[] = {1,2,3,4,5}; //declaring and integer array char b[] = {'a','b','c','d','e'}; //declaring and Character array *ptr=a; //assign values of integer array to integer pointer array for(int i=0;i<5;i++) //by looping, Print values of array a, pointing to pointer { cout<<"A["<< i+1 …  |
| | *Hi, Greetings to u all ... I am new to this website as well as in C++. I got a question in c++. I need to remove decimal point from amount (declared as CString) Eg. Amt is 145.76 I need the final output as 014576 and same to be stored … |
| | I am not able to understand the concept of virtual functions. When a member function of base class is redefined in derived class,the redefined function can be used to get desired output. Then why there is a need to use virtual functions? For instance, the following two codes produce the …  |
| | I need help with this program where i need to create a book record program where the program can view, update, add and delete books. Now this is the main menu: MAIN MENU 0. Exit 1. Search for a book 2. List books of a category 3. List books in … |
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