51,593 Topics
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| | I thought learning programming would be easier if the source codes where available..but the real fact is, it more confusing..the tar files consist of bunch of folders which still remains useless to me..i found no way to edit these source files...but only the make command to compile the software..whats the …  |
| | I have a project to create a simple polling system but my program is not working properly. The result the program is giving is not proper and dont know where the problem lies. can u guys help me out with this. U can see the function i've created to calculate …  |
| | static ssize_t write_server(int sd, const void *buf, size_t len, struct sockaddr_storage *to) { ssize_t nb; for (;;) { nb = sendto(sd, buf, len, 0, (struct sockaddr*) to, sizeof(to)); --> return -1  |
| | Hi! This is just an easy example of class inheritance. But, why does Sphere(Circle& K):Circle(K){} work? What does Circle(K) mean? Thanks! #include<iostream> #define PI 3.14159 using namespace std; class Circle { protected: float r; public: Circle(){} Circle(float r):r(r){} float circumference() {return 2*r*PI;} float area() {return r*r*PI;} }; class Sphere: public … |
| | write a file: #include<iostream> using namespace std; int main() { FILE *fp; fp=fopen("e:\\myfiles\\sample.txt","w"); //Check permission if you can write a file if(!fp) { cout << "cannot open file.\n"; system("pause"); exit(1); } //prints the character ASCII from 65 to 90 (A-Z) to a file for(int i=65; i<91; i++) fputc(i,fp); fclose(fp); return …  |
| | Hi everyone, I seem to be having a bit of a weird problem with sockaddr / sockaddr_in structs... I want to manually assign the value of an IP address to the sockaddr_in struct, and I've been using memcpy memcpy (&(mIp4sa->sin_addr.s_addr), "127.0.0.1", INET_ADDRSTRLEN); But when I go to print out the … |
| | hello my problem this time is i have an multidimensional vector and the example of adj vector is showen in the attached picture and i wanna know the size of each one i mean in i=0 the size is 2 i declare a new vector degree to put in it … |
| | i'm having a problem in reading a file i tried my code in code blocks/eclipse c++/netbeans c++ and even visual studio c++ 2010 each time it exits with (-1) while i'm puting the file in the right place for reading i don't know where is the mistake can you please … |
| | Hi, I have the following map : listOfPolicyRuleInfo CPCRF::m_mlistOfCliConfiguredPolicyRules; where typedef map<string, PolicyRuleInfo> listOfPolicyRuleInfo; where PolicyRuleInfo is a struct struct PolicyRuleInfo{ BearerQoSInfo stBearerQoS; TFTInfo stTFTInfo; PolicyRuleInfo(){}; PolicyRuleInfo( BearerQoSInfo const& qos, TFTInfo const& tft) : stBearerQoS(qos), stTFTInfo(tft) { } }; listOfPolicyRuleInfo m_mlistOfCliConfiguredPolicyRules = boost::assign::map_list_of("PolicyRule_Fred", PolicyRuleInfo( BearerQoSInfo(9), TFTInfo())) ("PolicyRule_Voice_C", PolicyRuleInfo( BearerQoSInfo(5), TFTInfo())) …  |
 | Okay, so I have a program that lets a user input information about dvds...it's a dvd library basically. I'm having a bit of trouble with nice output. I have data members for part of the info and vectors for the others. The output should show a movie title,length, year, actor/actresses, …  |
| | What difference between TCHAR* t1 = new TCHAR[5]; wcscpy(t1,L"Happy"); T.push_back(t1); and TCHAR t2[] = L"Day!"; T.push_back(t2); |
 | I'm sorry I keep having these strange problems but there's little I can do about them, they are unpredictable. I managed to fix the last one and I've been able to compile and run my programs. Now however I've run in to the *strangest *of problems, the one described in … |
| | Write a C++ program to check Armstrong number in given range .Those numbers which sum of its digits to power of number its digits is equal to that number are known as Armstrong number. EXAMPLE 1: 407 Total digits in 407=3 AND 43 + 03 + 73 = 64 + …  |
| | Recently i have come up with the scenario where i need a single class to handle a few different interfaces and i have found a few different approaches to take. I was wondering if anyone has encountered the same situation and can give me any suggestion(s) as to if there … |
| | I've essentially copied a small project from another computer to this one. This one is running windows 8.1. What happens when I try to compile even a hello world cpp project I get this error: 'Fatal error: "iostream" No such file or directry' . I know this means the compiler … |
| | I want to add a node at ith position. I added a head node and a node at position 4, 5 and 3 in sequence with value of 1,2,3,4 respectively. I also have a print function to print the values of the nodes. But my print function only prints the … |
| | What I want to understand is how it all works, including the following parts: WSADATA wsaData; SOCKET ConnectSocket = INVALID_SOCKET; iResult = WSAStartup(MAKEWORD(2,2), &wsaData); WSADATA is info, but what info is it specifically? WSAStartup is a function to initiate WS2_32.dll. What is the differenece between initiating WS2_32.dll and SOCKET? |
| | i cannot understand the squuence of this program at all some one explain in details plz #include<iostream> using namespace std ; void move(char,char,char,int) ; int main() { int n; cout<<"Enter the plates numbers \n"; cin>>n; move('a','b','c',n) ;system("pause");} void move(char x,char y,char z,int n){ if(n>1) move(x,z,y,n-1); cout<<x<<"----->"<<z<<"\n"; if(n>1) move(y,x,z,n-1); } |
| | I tried writing an clock applicantion but it did not work, the number is static, how to make it change. And how to remove minimal, maximal button and icon of windows, for the icon I tried: wcex.hIcon = NULL; wcex.hIconSm = NULL; But it showed a default icon Thanks for … |
| | how to file handling e.g read and write file ,with window form application in visual studio |
| | Okay, so I'm still stumped on an output problem. The problem is, I have list items and one of those column objects has more than one item(the other columns don't for each particular item) Some reason, when I add another object to the console for printing it ends up like: … |
| | Hey guys, I have some code set up to iterate through a nested map. It current works as expected, iterating through all values in the first key, and then the second key. My question is, is there any way to display one value from each key? For example, if key …  |
| | I have got the program writing to the files, but i am unsure where to even begin to pull the information back out. the information is saved like this: 15 Ray Allrich # 10.25 0 0 in one file the other file has the id number and hours worked 5 … |
| | Hi everyone, I am working on a C++ Pig Latin program for school which translates English sentences into Pig Latin. Here are the guidelines to it: You are to write a program that translates English to Pig Latin. In case you have forgotten, the way you translate English to Pig …  |
| | hello anyone i want to copyrigt my souce code so that the copyright message is hidden from anyone who open the code in c++ but show the message on console screen for example property belong to "my name" it doesnot appear on the cpp or not easy to remove but … |
| | My professor assigned a problem from our OS book about matrix multiplication. Its pretty simple as the book shows how to do most of it. But now my professor has added an extra layer of difficulty. Instead of declaring the multidimensional arrays globally he wants us to input the size … |
| | Hi, I'm making a windows console application that can create and terminate processes, and stores their start and end time. It works fine as long as I start and end the processes from my application itself. However, if I close the child process, eg notepad, using it's own 'X' button, … |
| | Hi. I need help with the following C program: How to print first member of sequence so that condition `|a(n)-a(n-1)|<EPS` is true, where *EPS* is a random input precision (double value). Sequence *a(n)* is given by: `a(n)=(1-1/2!)(1+1/3!)...(1+(1/(n+1)!))` I tried to cancel factorial in the expression `a(n)-a(n-1)=((-1)^n(n+2))/(n+1)!`, but I don't know … |
 | When you need to create a login page using PHP and MySQL, the safety of this login page relies on - Your PHP scripting abilities - How well and securely has PHP been programmed in C++. - How well C++ compiler of interpreter of PHP has been programmed. - How …  |
| | I tried to build really basic associative array but it turned out I don't have enough knowledge, so I tried something less, and less, and less, because I kept failing at it. Finally I just tried to set variables and print them in the command-line. But I can't even do … |
| | In below code, I expect 1 to be initialized in all the 10 elements in x array. But, it doesn't seem to be working. May I know what I am missing here int main() { int *x = new int[10]; //std::cout<<"address of x: "<<&x<<std::endl; for(int i =0; i <10; ++i){ … |
| | Hey Guys, I'm pretty new to containers, but need to use them for a project I'm doing. I've figured out that I can use a map iterator to iterate through values stored in the map displaying the key, followed by the second value. In my case, the key is an`int` … |
| | I have this regular struct struct Person{ char *name; int age; } and I should do some regular stuff like, input size, create dynamic array of persons , and take user input for this person. But the problem, as you can see is how do I input in name pointer; …  |
| | Hello everyone, If i need my program to create as much vectors as needed based on the user first input , assuming each vectors will hold an int value like a combinations of numbers, so latter those vectors will be compared for higher value. EX: prompt the user to enter … |
| | hello guys i make a simple calculator in window form application and i want to add it with a scientific calculator form how can i connect these two forms |
| | I cannot understand user defined functions in c++? Please give suggestions or refer any book or website where I can learn User - defined functions in C++? |
| | HOW TO CODE FOR A SAVE,DELETE,EXIT BUTTONS IN VISUAL C++? PLZ HELP ME I REALLY WANT TO KNOW THIS PROGRAMMING LANGUAGE |
| | Hi Daniweb, I'm making a shell-ish console for my Operating Systems class. Trying to get the shell to Terminate a process given a process name. Ever since I made the following addition to my code, this error is coming: `Program received signal SIGSEGV, Segmentation fault.In __gnu_cxx::__exchange_and_add(int volatile*, int) () ()` … |
| | define linked list called student name number address and the following function add function that add the information of the student 2 search function that search print the name of all student with some address search ("zarqa,amman,irbid") will print the name of students lives in amman 3 count function that … |
| | i have this code uptil yet in which i am adding records in a text file [array of structure] and displaying the text file what i want to do is to implement delete previous record functionality and also to edit the previous records could anyone please guide me as to …  |
| | hey guys please tell me how to add two form in vc++ 2010 , i made a calculator in window form and i want to add one more form with a button click |
| | I have used function write() in a loop to write 2 names in binary mode to a file. Now, when I try to read those 2 names I use this logic : 1) find size of file in bytes; 2) create buffer with that size; 1) read into buffer until … |
 | Hi It's been a while i'm learing C++ but still i have some issue with `Move semantics` and some other stuff. I wrote this class but i don't know why the `Copy constructor` is getting called and the output is a little strange to me, shouldn't the `Move Constructor` gets … |
| | Good day to you all people. I personally like to use Visual Studio and Dev C++ to develop my c++ apps. Recently, I was introduced to a new environment, Textpad as the editor and Cygwin as the compiler. I found interesting that in Visul Studio and Dev C++ you are …  |
| | what is the difference in exit(0),exit(1),exit(2) ? how it differs from Return statement? |
| | Good day people. They say the only way you can be a good programmer is if you learn it the hard way, by coding a lot and working on the analytical skills. I believe that all of us in this community have faced some problems in c++ and then were … |
| | # Introduction # A recurring problem many newcomers face when tackling C++ is the compilation process, from sources to binaries. This tutorial will detail that process. It will be especially useful for people only familiar with higher-level languages (if any), but veterans of one or more native languages (C, Fortran, … |
| | hi members please tell me what push_back function do , and why it is use |
| | is it possible to show c++ coding output which was made in empty project to windows form application program?? I made windows form for example i used spiltcontainer toolbox for panel 2 contains my c++ console output i expect someone's reply thank you |
| | PLZ Don't make mistake about what i'm writing & if u dont understand dont answer plz. I need just a digital clock in C++ with gotoxy &print"****" &... i want to find the difference between this one & the others completely no different if any one just wrote with gotoxy … |
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