51,593 Topics
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| | Hello, I need to start using databases with c++. I know in VB or VBA is simple and easy to find tutorials. I've done a lot of database apps in VBA and VB. I couldn't find help for c++, only for vc++. I use Code::Blocks and mingw. If anyone knows … |
| | Im developing a windows form application is Visual Studio Express 2013 I made a New Project -> Empty CLR Project then i added the windows form UI and i coded the (myprojectname).cpp this code #include "MyForm.h" using namespace winformapp; [STAThreadAttribute] int main(array<System::String ^> ^args) { // Enabling Windows XP visual … |
 | I'm trying to scroll through a list of cstrings and if they end in an 's' I want to replace it with a '\0' the problem is somtimes it catches the word and corrects it for a comparison, but other times it doesn't while (ptr != NULL) { if(ptr[sizeof(ptr)] == …  |
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 | I have hard time understanding how does it happen. I mean how does : 6 / \ 3 8 / 2 I get that program finds the num on the left side whos equal to null so its smallest and it prints out 2. But how does it go back … |
| | here is question: Write a function that accepts an array of integers and its size as arguments. The function should create a new array that is one element larger than the argument array. The first element of the new array should be set to 0. Element 0 of the argument …  |
| | Can someone explain this line a bit for me, I get the big picture, but the under-the-hood aspects are eluding me. testFile.getline(buffer, sizeof(buffer)); I have a char array buffer of size 80. Get line extracts a line from my testFile, and puts it into the buffer. When I "cout" the … |
 | why we can't declare a static variable incide local class(class inside a function) ? |
| | Hi my name is Xednyc, I'm very new to C++ since this is my first year in college, I am taking an IT course. I am currently out of ideas on what program to make, anyone could suggest an interactive, fun, yet not so simple program for a newbie like …  |
| | Hello, I lost some hours trying to set up wxWidgets and starting a simple program using Code::Blocks. wxWidgets is installed and built, following [this](http://wiki.codeblocks.org/index.php?title=WxWindowsQuickRef) tutorial. But when I start a new project I get into some message saying: "A matching debug configuration cannot be found in the wxWidgets directory you … |
| | I'm reading a file in line by line. At the end of the file there wackily are to carriage returns. I'm reading the lines in like this (code below) then parsing them. Because there are two wonderful returns the wonderful program crashes everytime I run it. char* ptr; ptr = … |
| | Hi All, I am having trouble trying to locate the problem with this code. When I run it I get the follow error "First-chance exception at 0x0FADA9E8 (msvcr120d.dll) in ConsoleApplication2.exe: 0xC0000005: Access violation reading location 0xCCCCCCC0." It seems to show an error on the dbgdel.cpp but I am completley lost …  |
| | I'm trying to parse an input file line by line. I want to grab each line one at a time, put it into a null terminated char array. I can't seem to do it. I tried something like this and just got weird ass results. int q = 0; do … |
| | I try to compile the next code but the compiler says that **`int base::i' is private ** #include <cstdlib> #include <iostream> class base { int i; public: base (int i=0); void set (); int get (); }; class derivada:public base { public: void set (); } ; using namespace std; … |
| | I'm trying to search for a word in an array of strings, everytime it gets to the while loop it just loops infinitely. It's getting the words and comparing just that when it gets to the second else, It just takes a fat dump. Can anyone help? So damn frustrating. … |
 | using API functions, can i get the text rectangule? |
| | Hi guys, i am so new here, but i work c++ for 3 years but i have a hard. i have a executable file and i want to encrypt this, how i manipulate an exe file ? i have a little bit asm x86. Thanks for your comments. |
 | Iam a student of computer science and i am in the first year of my college(I am studying computer science and engineering). I am thinking of doing a project in c++ which analyses the amount of oops concept used in a specific code. To speak more elaborately, I want to … |
| | I am using the gcc compiler and I am new to using flags. Can any one tell me a source for it. e.g. I wanted to use *-funroll-loops* but I dont know the proper syntax. Can any one help.  |
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 | Write a C++ program which takes a positive integer N from the user, and prints the multiplication table of size N by N. For example, if the user enters 10, the following table should be displayed by your program. 1 2 3 4 5 6 7 8 9 10 +---------------------------------------- …  |
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 | I need a program which shows the number is even or odd and print the table of 2 if the any even number we enter and when we enter the any odd number the program print the table of three please help as soon as possible |
| | Hello, as it can be inferred from profile, I am new. I have read the community guidelines and I have done prior research. I am a very weak coder(through my own fault). However, I like to believe I firm conceptual understanding. **So What is my problem?** I have an assignement … |
 | write a program using function in 'cmath.h' to demonstrate the usage of 9 commnads in cmath header file . using 'loop control structures' #thanks for any help |
| | I read about pointers and it says that array names can be used as pointer constants and pointers can be used as array names and here is an example that prove the first statement (`array names can be used as pointer constants`) #include<iostream> using namespace std; int main() { int …  |
| | Hi Daniweb programmers.I am a kenyan guy in University of Nairobi Doing an undergraduate degree in CIVIL ENGINEERING but I am a teaching myself C++ because I feel an inborn calling for coding. I appreciate the forums i have already seen. like Bjarne stroutsup said in an interview with Daniweb, …  |
| | I defined two class, one it's call Movil and the other it's call Camion which it's a derived class of Movil. The code that I am talking is: #include <cstdlib> #include <iostream> //class definition class Movil { int ruedas; float velocidadMax; public: Movil (int ruedas=0, float velocidad=0); void setRuedas (int … |
 | This is a timer class that I wrote a while ago (cleaned up a bit for the snippet) for adding delays in some of the games I have written over the years. Note: I normally have the class functions in a .cpp file but since it looks like I can …  |
 | I feel that following is the conclusion in C++ coding related to Class and access specifiers. We know that we are hiding the data by making private or protected. But there are ways to access it. The one who does not know how to access it will be confused but …  |
| | So i don't really understand how I will calculate the time complexity for my code, I've had a hard time with it and I would really need some help. the exponent is N all the time. So how will i find the time complexity in N-time(bits).. for(int i = 0; … |
| | Hey everyone, Im creating a Tic-Tac-Toe game and i was wondering if i would need to hard code my function in order to get "pretty" output. Like underscores between the rows and a line between the columns. Pretty much have the game in a table labeled columns/rows with the column … |
| | I need help with my big integer calculator program. The program should receive two large integers using vectors and calculate the sum, difference, product, and quotient o the two integers. The main file is: [code]#include <iostream> // cout, <<, >> #include <fstream> // istream, ofstream #include <string> // string #include … |
| | Is it possible to do the following as you can for a C++ string. I can't seem to do this for a Cstring? That is, add characters to the Cstring the same way? eg // lets assume this vector is full of characters vector<char> charvec; string str; const char* Cstring; … |
| | I have a problem in c, i want to achieve this kind of thing using the code i written below. The input and output should be like this: Input Freq Output Freq 1 0,1,4,2,5,3 add two first (0+1) 0,1,4,2,5,3,1 2 4,2,5,3,1 add min and last (2+1) 0,1,4,2,5,3,1,3 3 4,5,3,3 add … |
 | I am relatively new to C#, does anybody have a simple example of how calling C++ from C# would be done? I heard that C# can call other languages.  |
| | For the if discriminant < 0 statement, I need to not only display the error message, but I must display the complex roots in the correct format for complex numbers. How should I go about that? #include <iostream> #include <cmath> using std::cout; using std::cin; int main() { int a = … |
| | So I'm new to C++ and I am doing a project that requires the creation of a menu for a simple game. The project instructions are: Write a program that will ask the user to purchase a vehicle for their character in a racing game. Tell them how much their …  |
 | Hello everyone! I have a homework assignment that I'm just not understanding...We're tyring to implement 4 total ciphers. I have the Caesar Cipher down: #include <cstring> #include "algorithms.h" void caesarEncrypt( const char plaintext[] , char ciphertext[], int key ) { int idx; for( idx = 0; idx < strlen(plaintext); idx++ … |
| | I'm just trying to scroll through a input file, fin is the object name and it goes into an infinite loop. I'm using this check !fin.eof what am I missing or not understanding? #include <iostream> #include <fstream> #include <cctype> #include <cstdlib> #include <string> using namespace std; // ------ PROTOTYPES --------------------------------------------- … |
 | I want to write a program which generates armstrong numbers between any two numbers!  |
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| | If i uncomment the lines in between, all the records get deleted. Why?? void Hatao() { int no; system("cls"); cout<<"\n\n\n\tDelete Record"; top:cout<<"\n\nPlease Enter The roll number of student You Want To Delete: "; cin>>no; fp.open("student.dat",ios::in|ios::ate); fp.seekp(0,ios::beg); fp.seekg(0,ios::beg); fstream fp2; fp2.open("Temp.dat",ios::out); //int flag=0; //if (st.retrollno()==no) //flag=1; //if (flag==0) //{ // cout<<"\nRecord … |
| | hello , after learning on functions in c++ , i created several functions and now i wanna create a gourp which will have these several functions at a place(i think its done with header file). so, i think if i create a header file and include these all these functions … |
| | Hi all, I’ve been given told to convert a standard C++ program into an object-oriented one, using the principals of polymorphism, encapsulation and inheritance. Our lecturer covered all three principals in one 45 minute slot. I’m completely stuck and would be grateful for any help. The standard C++ program accepts … |
 | number1 = 0; number2 = 0; while(number1 < 5) number1 ++; number2 += number1; Question#1 : what is the value of number1 when the loop exits? Question#2 : what is the value of number2 when the loop exits? Question#3 : if the statement number1++ is changed to ++number1, what is … |
| | Hi, Im a new beginner to C++ and i have a question. I have a .txt document with many different values. I would like to return a value from the .txt file depending on what value i give in. I want to pass how many lines in the .txt file. … |
| | Hi, can someone pls help me. I'm trying to pass the name of the user who logs in from a login form and display his/her name on a Main form. I'm using get{} and set{}. My problem is with the function I'm trying to create to return the name of …  |
| | Hey guys, im building a Tic Tac Toe game and im checking for a winner via this function(code below), Im juct wondering if there is a better way of doing this then how im doing it. if so could you point me in the right direction thanks :) The array … |
| | This program is supposed to run through the menus to eventually display the area or volume of a shape depending on the user's menu choices and input. However, it won't run the final menu and I'm not sure why. There aren't any problems when it goes through the debugger, it … |
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