51,593 Topics
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 | Hello guys, I'm new here and with C++ and i have a problem if you are kind to help me. Me and my friend have created a small program that download yt videos and upload them on specified yt accounts entered by us, when i hit run it opens 50 … |
| | Kindly suggest to create a company presentations in c# window form  |
 | I want to know how I can do this: 1. Find "sqrt" in a string 2. Replace "sqrt" with only "#" I have the following code but its not working. Why? size_t found = 0; found = modifiedExpr.find("sqrt"); if(found!=std::string::npos) { modifiedExpr.replace(modifiedExpr.find(sqrt),sqrt.length(),"#"); }  |
| | Hi again, so guys I want to add some color to my text but all the explanations I find are some links to complicated ways of doing it with almost no explanation of the operators functions and so on. Could you show me an easy way to make for example … |
 | Hello to all! I am using compiler Dev C++ but i am facing a problem in with it. Sometimes it happens that if i try to run one program , it displays the output of another program instead of required program. For example I have two programs named as "Pointer" …  |
| | Hi, Please help me write this C code as i am clueless and helpless in C programming Write a C program, which allows the user to enter a valid filename and then prints the file content to screen, two lines at a time. The program should pause after displaying the …  |
| | Let me explain what I want to do: I want to change a expression like this: x * (2 + 3) - (y + 1) to this: 5 * (2 + 3) - (6 + 1) using this: instVar('x', 5); instVar('y', 6); The problem is I get the following output: … |
| | I am trying to create a window with a custom background after playing with the different styles, to practice declarations and destroying objects for future reference. Whenever I try to compile the code I get the following errors: "undefined reference to CreateSolidBrush@4" and "undefined reference to DestroyObject@4". Where in my … |
| | I learned how you can use the switch statement to make the program go through the stuff inside and choose the one that matches the condition set. Isnt that basically what "if" statements do? so does this mean we can completely replace 'if' with 'switch'? because it seems way more …  |
 | Is C++ worth learning for webapps? I know python and it works well, so would it even be worth it to learn c++? |
| | For the past while, I have gotten comfortable doing things a particular way when it comes to inputting data: i) create text file whose first entry is N, an integer indicating the number of data entries following, and the actual data entries. For example, for 101 data values, the text … |
| | I am getting errors when I'm trying the following: instantiateVariable(string startingExpr, char var_, int val_) { int sizeArray = startingExpr.length(); //Convert the int into a char/string int number = val_; string newChar = ""; ostringstream temp; temp << val_; newChar = temp.str(); //Searching for the variable in the array for(int … |
| | I have to do my project using C++, should I firstly read a book about that and after that write the programming, or it's better to start wtiring my code and solve my problems and questions at the same time?  |
| | You pros are once newbies like us. Hoped you might take a little time sharing your expertise. Got freaked out when our teacher gave us this activity, where she haven't taught this to us yet. So this is the activity (LOOPING) : Write a program that accepts a positive integer. … |
 | - When i'm trying to delete the first number of list, something went wrong when i print the list? - Can anyone help me? Thanks so much T_T. - Here my code: #include <stdio.h> #include <conio.h> #include <stdlib.h> struct node { int inf; node *next; }; node *insert_head(node *first, int … |
| | Hello all, I am getting 3 errors when I try to use stacks when I want to evaluate a postfix expression. I am not very experienced with the usage of stacks so please be patient with me. Here is my code: //The postfix parameter is a postfix string that was … |
 | Hi please help me, im trying to make a program that only accepts numbers. What can I do to disable letters and special symbols? for example, I enter "sffsdttsfsjfs" / "!%#^$*$(" then the program would prompt that "Error: Letters and Special Symbols are not allowed" I saw a thread here, … |
| | So I just started using the Goto command and I have some trouble with it. I will post my code and explain the problem. cout<<"So here we are at your first choice."<<endl; cout<<"-Do you 'stand' there and TRY to get me out of your head..."<<endl; cout<<"Or do you 'follow' the …  |
 | hi all, while i am learning the overloading operators ,i studied the following syntax ostream&operator<<(ostream &, classname&); i understand how it works but only something that i don't understand is the use of (&) with ofstream class ?at this point what's happening ? also i notice that i can do …  |
| | Hi all, for the code shown below , every thing is okey except few things i output the obj[i](sure the [] is overloaded) with the overloaded << but inside the operator definition i was outputing the m data member of the reference object,how ever it also outputs the m data … |
 | Nothing special - I just need to grab a line and slap it into a string - if(found == 1) { cout << "\n\n Please enter a new location for this event: \n"; getline(cin,newAct); cout << "New Account: " << newAct << endl; } else { cout << "\nEvent not … |
| | I'm new to using vectors, and I'm trying to declare a vector with size 1: vector<string> activities(1); I get an error with this code, can anyone explain why? G:\ManageActivities\Activity.h|11|error: expected identifier before numeric constant| G:\ManageActivities\Activity.h|11|error: expected ',' or '...' before numeric constant| |
 | Is it poor convention to create a c++ file only to store various functions, and then include it into the main.cpp? This would be done so that the functions could be used in different programs as well. |
| | Hi guys so I am still learning and there might be an easier way to do thing than how i do them but still i need some help. So I was thinking of making a program in which it asks you a question , lets say Yes/No question and you … |
 | class Animal { string _name; string _type; string _sound; // private constructor prevents construction of base class Animal(){}; protected: // protected constructor for use by derived classes Animal(const string & n, const string & t, const string & s) : _name(n), _type(t), _sound(s) {} public: void speak() const; const string … |
| | I do not understand what the following code does: enum testEnum: unsigned char { FOO_ENUM, BAR_ENUM }; unsigned char sideFilter1 = 1 << FOO_ENUM; unsigned char sideFilter2 = (1 << FOO_ENUM) | (1 << BAR_ENUM); |
 | Actually i am confused with concept of database conectivity in c++ with any traditional Dbase server is it possible if yes then how....pls help Thanks for the help in advance  |
| | Hello! I've seen a thousand dicsussion about how to make an .exe file from your .cpp source code, but none of it seems to help me: since I have the .exe file, I just can't run it on any other computer. Can anybody help me out, what libraries should I … |
| | Hello, I'm a beginner in this site. I was just hoping that someone might be able to answer my question regarding to debugging a payroll. Here: #include <iostream> #include <conio.h> #include <string> #include <windows.h> #include <stdio.h> using namespace std; const string userName= "Username"; //assigns the username const string passWord= "Password"; … |
| | Hey guys. So I have made a little project but I want to give it to a friend to test it out. I am using Code::Blocks and I want to save the file so that when you click it it comes out like the window I get when I run … |
| | Hi guys , so I just started learning C++ so I am trying to do something but id does not turn out quite how I want it to be. So my idea is to create a text game and I'm at the very beggining and I have a lot of … |
| | Hi there, I need explanation for the range of data type say character which is 1byte ranges from -127 to 127 or 0 to 255. I did not understand what it means and how can I check the range of characters. Does it means it can store only values from …  |
| | hi, below is the code for binary search in case of array is sorted in ascending order. what changes i have to do if array is sorted in descending order. #include<iostream> using namespace std; void getdata (int a[], int size); int binarysearch (int a[], int size, int key); int main() … |
| | Hlo guys can u please tell me that websites can be created in c or c++ please suggest me something... thanks for the help |
 | Hello gentelemen, I'm sure many of you are experiencing what I am experiencing right now. I'm halfway into Christmas break, back at my parents', with the paperbacks I brought along depleted, the roguelike I downloaded unable to start after an OS upgrade and literally nothing else to do for the …  |
| | #include <iostream> #include <string> using namespace std; int main() { int nap; cout<<"Milyen nap van ma?\n "; cin>>nap; if (string nap =="hétfő") { cout<<"Szar rizzsel"; } return 0; } I just begun to explore the wonders of C++. I'm trying to write a simple code but I always run into … |
| | Hello. I am trying to calculate the distance between coordinates. I am detecting the movement from camera/video, using for tennis ball tracking and saving the coordinates of all candidates so that means the ball movement and also the player or whatever noise there could be. My final goal is to … |
| | Hi Brethrem, am kind of new in the C++ world, so far am learning about functions but am stuck on the difference between call a function by reference and call it by value. I will appreciate your help |
| | I'm required to learn it for a degree. I already know a bit of Java. But I'm just kind of wondering if it's a waste of time or not. |
| | What is the difference between Static Variable and Ordinary Variable?Which Variable is expensive to use in c++ programming?Give some resion? |
| | My instructor provided this class for us to use. He hasn't answered the e-mail I sent, and this is due soon. I keep getting an error. I haven't touched the file, just included it. G:\ManageActivities\Date.h|23|error: 'string' does not name a type| #ifndef DATE_H #define DATE_H #include <string> #include <sstream> class … |
| | OK so I'm using the function SetDlgItemText() to change the text in a static text control of my window. Problem is, when it updates from a longer string to a shorter string ("Sup Y'all" -> "Hi"), the previous, longer string persists leaving "Hip Y'all". However, remaining bit of the old … |
| | I am trying to transform a infix mathematical expression into a postfix expression using the shunting yard algortihm but can only get so far by writing the pseudo code because I know exactly what to do through logical thinking but can't write the code that will help me do it. … |
 | i am lookng for some sample c coding for fuzzy logic, can anyone help me in developig fuzzy logic in c,.. i had developed my fuzzy rules in matlab, now i hav to develop the c coding for the developed model, can anyoe help me in developing the c code, … |
 | Am having real problem understanding what the problem is. Here is the code : Stack.h : #ifndef STACK_H #define STACK_H #include<Node.h> typedef int Stack_entry; class Stack { public: enum Error_code{succes,overflow,underflow}; private: int counter; public: Stack(); ~Stack(); //Stack& operator=(const Stack &Stack_copy); bool empty_stack()const; Error_code push(const Stack_entry &item); Error_code pop(); Error_code top(Stack_entry …  |
| | Hi I am beginner in c++ , I have a console project and want to convert it to windows application , after 6-7 days trying I couldn't convert it and when I compile project I have many more errors This is my console project: http://uploaded.net/file/8yv5u1s7 Please convert it for me … |
| | Hi there. I have found how to declare a two dimensional vector like below: vector < vector < vector<int> > > myvector; My question is, how do I declare a three dimensional vector? Is it as per below? I just thought there may be a standard for this. Thanks vector … |
| | I am working on how to convert a infix to postfix expression and then calculate that converted postfix expression. I have the following thought process on how to do this. 1. Receive a infix expression (Through the main file) 2. Instantiate the variables in this expression through a function called … |
| | Hi,can you explain the use of **for_each and lambda** in c++11.What are they for,how to use? I have seen a few examples but do not get the meaning.Thank you. |
 | i'm trying to understand some joystick structure: http://msdn.microsoft.com/en-us/library/windows/desktop/dd757112%28v=vs.85%29.aspx but isn't easy. at least these image help me more(joystick layout): https://onedrive.live.com/?cid=C3EF456E15C8DEB6&id=C3EF456E15C8DEB6!1259&v=3 but i need ask more: 1 - the Hat and X and Y coordenates are the same or they can be programmed in separed ways? 2 - i can't find … |
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