51,593 Topics
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| | Write a program that can do the following: addition of two matrices . subtraction of two matrices. multiplication of a matrix by a scalar. multiplication of a matrix by a matrix.  |
| | I am trying to write a code that checks if password is pass with the use of functions...but i am not able to ....Please help me i am a beginner....and i need this program to be written strictly using functions....thsnk u in advance |
| | i am developing a project in c++ and i need database to save details.i googled but so far have bot come across a good tutorial for c++ database . most of the articles i have found are obsolete. please suggest what are APIs for database in c++?  |
 | Write a program that uses a for statement to sum a sequence of integers. Assume that the first integer read specifies the number of values remaining to be entered. Your program should read only one value per input statement. A typical input sequence might be 5 100 200 300 400 … |
| | I'm having a problem accessing information between classes. The following simple program illustrates the problem. I have two classes. Int Cell and second. IntCell has a single data member: storedValue. I initialize the value of storedValue to 0, and then assign a value of 16 to it in main() on … |
| | This is the code that I have for inserting a node, but I don't know how to do the delete function. Any tips would be helpful // Constructor Tree::Tree() { root = NULL; } // Destructor Tree::~Tree() { freeNode(root); } // Free the node void Tree::freeNode(Node* leaf) { if ( … |
| | Greetings everybody, I would like to ask you which C++ libraries you use for ethernet communication? In web I found several; [boost.asio](http://www.boost.org/doc/libs/1_55_0/doc/html/boost_asio.html) [Nut/OS](http://www.ethernut.de/api/index.html) [Sockets](http://www.alhem.net/Sockets/index.html) Is there another and easy? By the way, which one of these three libraries are easier to use :) . Thanks in advance |
| | Can you guys please help me understand when to use const? For example, if I have the following functions: viod add (int* array) { int total = array[1] + array[2]; } viod subtract (int* array); viod times (int* array); viod divide (int* array); viod printArray(int* array); and I only intend … |
| | I got a small program here, I am just trying to return a string value from a function through a reference parameter but I keep getting an error. Any help or tips will be appreciated #include<iostream> using namespace std; int timesTen(int, string&); int main() { int number = 6, product; … |
| | Greetings everybody, I have been develolping a program for isochronous USB communication. In run time, when allocating memory for transfer, libusb_transfer, ENOMEM error arises. I have been looking for a solution for this problem, but I have not come to a conclusion, yet. What might be the reason of this … |
| | You cannot determine whether a ctor is being called on an object that is to become const. Such as: const Foo bar( another_foo ); // no way to determine in the ctor that bar will be const I'd like some sort of function attribute for copy constructors to determine if … |
| | Hi. Why am I getting different output when I call the calculate() function? The output on line 184 gives 1.0001, while the output from line 433 gives 1. Thanks. #include <iostream> #include <string> #include <limits> #include <vector> #include <iomanip> using namespace std; /** * Global Variables */ string k; int … |
| | i'm not sure if a pointer can do the job of an iterator, or otherwise, or they are different things?  |
| | gimme the error plz it says undefined symbol _main in module c0.asm #include<iostream.h> class largest { private : int num1,num2,num3,big; public : void enter(int a,int b,int c); void max(void); void display(void); }; void largest::enter(int a,int b,int c) { cout<<"Enter numbers n"; a=num1; b=num2; c=num3; cin>>a>>b>>c; } void largest::max(void) { big=num1; … |
| | how I can introduce printf and scanf in microsoft visual c++ 2010 express i used #include<stdio.h> , #include<isotream> and using namespace std; put it still doesnt work ???  |
| | hi so this project requires an input of U, M, or D and as many as you like of them (i think, might be only up to 100 based on charUMD[100] array in code) also, you have to end it with # in order to indicate the end. i am … |
| | You are required to write a C++ program to covert a positive inter code into English name equivalent for the digit. A valid code is of size between four (4) to six (6) digits inclusive. A zero is not allowed in a code. Example: If input is 234056 the output … |
| | I really love working with structs, and I get how they work and everything. And I know my issue right now is the math (I'm horrible at math!) But my problem: I need to create a program that reads from a .txt file of employees (let's say 5) an they're … |
| | Hey all, I've been making a caesar cipher but seem to have encountered a problem. My program reads an integer from a text file and stores it as the shift value. Then my goal was to add that shift value to the alphabet array. Here is a part of my …  |
| | Hello, I have this program that runs in C++ that I need to run in C. This is my program in C++: #include <iostream> #include <string> #include <cctype> using namespace std; char encode (char plaintext) { if (isupper(plaintext)) { if (plaintext > 'M') { plaintext += 13; } else { … |
| | Could anyone explain the problem im having on line 28, (value = amp*sin(2*pi*freq*t);) i keep getting this error message 28 11 [Error] cannot convert 'double' to 'float*' in assignment #include <cstdlib> #include <iostream> #include <math.h> #include "dp_lib.h" using namespace std; int main() { double pi=3.141592653589793238462643383279502884197169399375; float* value; unsigned long length … |
 | So decided I should switch to VS13 for the added benefits. Copied the cold, transfered the files, alls good right? Wrong. Actually its not that bad. Just one main problem. `ltm` See this fella? This is the one guy that is standing in the way of me and the debachury …  |
| | so im trying to convert my code from localtime to localtime_s. it was this: time_t now = time(0); tm *ltm = localtime_s(&now); i seem to be having some strctual errors. Can i have some help? |
| | Hi, While executing below code i am getting error like "memory clobbered before allocated block" and due to this assignment is not happening. could you let me know what can be reason for the same. I do understand it is not good to use raw pointer but in current scenario … |
 | We were given a task to use lists and iterators. We were supposed to make them from scratch. I'm done with that. The problems that I'm having are as following: 1. I'm not able to access the list made of Course datatype which is present in each Student instance. Does … |
| | This assignment asks to add some code from to a previous assignment I had. I have been confused about this overload operators alot and im confused on how to do it in my code any help with this will be good A) overload the >> operator to allow for reading …  |
 | So I've begun using a library called Poco. My program doesn't do what its supposed to yet I've checked over everything. The code is: #include "stdafx.h" #include <iostream> #include <Poco/Debugger.h> #include <string.h> #ifdef POCO_ARCH_LITTLE_ENDIAN std::string endianness = "Host byte order is Little Endian.\n"; #else std::string endianness = "Host byte order … |
| | I'm fairly new with arrays but from my understanding it is set up as so: datatype arrayname[#of elements] = {elements}; I was wondering why this code doesn't work typedef char alphabet[26] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', …  |
| | Hello everyone. I need some help on creating a slot machine. It needs to have the option of playing a three wheel & four wheel machine. I've created separate functions for those two. I think I understand the whole random generating concept, but I'm having a hard time figuring out … |
| | I am new to C++ and i don't understant this error message i am recieving. Could you show me the solution? ([Error] name lookup of 'n' changed for ISO 'for' scoping [-fpermissive]) line 25, col 17 (the 'n' is the problem) #include <cstdlib> #include <iostream> #include <math.h> #include "dp_lib.h" using …  |
 | write a c++ programme that read an unknown number of integers value and then print count, sum and average of 1. even value 2. odd value 3. negative value 4. positive value thank you |
| | **what can i do with this errors?please help me! thanks** >#ifndef WS2811_h >#define WS2811_h >#include <avr/io.h> >#include <util/delay.h> >#include <WS2811.h> **Error 1 unterminated #ifndef** >typedef struct __attribute__ ((__packed__)) { > uint8_t r; > uint8_t g; > uint8_t b; >} RGB_t; **Error 2 expected ':', ',', ';', '}' or '__attribute__' before … |
| | I have a question about classes and header files. As I see the trend of reusing classes, I would like to start building the classes in their own file, and be able to call it, and use(#include "class.h") to include them. I am a little bit confused because I understood … |
 | what do you prefere for naming: database - c++ - java - php? 1- User_id - User_Name 2- user_id - user_name 3- UserId - UserName 4- userId - userName 5- else |
| | Assalam o Alikum my question is that what is the difference between character array and string. my instructor is use char str [50] instead of string str. and i can not understand what is difference between them. |
| | Hi. I'm trying to implement a disk scheduling algorithm using a vector. I am able to find the smallest element of the vector with my findMin() function: int computer::findMin( vector<int> v ) { int minIndex = 0; for( int i = 1; i < v.size( ); i++ ) if( v[ …  |
| | hi can u please help me solve this question. A small company dealing with transportation has just purchased a computer for its new automated reservations system. You have been asked to program the new system. You are to write a program called ReservationSystem to assign seats on a vehicle. Your … |
 | hallo everyone i am lookng for some sample c coding for fuzzy logic, can anyone help me in developig fuzzy logic in c,.. i had developed the fuzzy logic in matlab, now i need to write the code in c, looking for some sample code,..  |
| | Well this is quite a large program so there is a lot of information to sort through, but when I compile it now it comes up with this: /Users/Adam/Adam's Work/Programming/C++/Code/OS2.cpp: In member function ‘virtual int dbase::todo()’: /Users/Adam/Adam's Work/Programming/C++/Code/OS2.cpp:393: error: invalid conversion from ‘const char*’ to ‘int’ /Users/Adam/Adam's Work/Programming/C++/Code/OS2.cpp:394: error: invalid …  |
| | 1. This assignment asks to add some code from to a previous assignment I had. I have been confused about this overload operators alot and im confused on how to do it in my code any help with this will be good A) overload the >> operator to allow for … |
| | i found following code to create a two dimensional array at run time if one of the dimension is known.. char (*c)[5]; c=new char[n][5]; first line is pointer to an array of 5 integers but i couldnt undesratnd the second step. |
| | Need a little help please: i have been trying to complete this for a couple days but i get more and more confused everytime i try. When an object is falling because of gravity, the following formula can be used to determine the distance the object falls in a specific … |
| | my question is that when we use static data member and ststic function and nobody can not satisfy me about this question i need actual reason of using the static data member and ststic member function |
| | write a c++ class run that contains followin data member 1)name of runner. 2)distance covered by runner. class ha following member function 1)get function for input runner name and distance. 2)show function to display runner name and distance. the user should be able to show the name of the runner …  |
| | This is what I have to code. Input an array of numbers(any numbers that user inputs from standard input, aka keyboard), remove numbers from array that are not 0 and 1. Thay array should now be bitwise moved with << or >> (again user choses the number of spaces moved … |
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| | i"m new at this.. please help me! i keep getting this error Error 5 error C2360: initialization of 'levelOne' is skipped by 'case' label. I get a "transfer of control bypasses initialization of:" error when i try to build the following switch: void ViewCourses() { int choice = 0; cout<<"Please … |
| | I'm trying to write a simple game using SDL and OpenGL. Up until now, I was using purely SDL and pixel manipulations on the framebuffer to draw lines and other shapes. However, as you would expect, that got unbearably slow as the number of objects on the screen increased. Now … |
| | I can't get the code to display in an ordered list. // Chapter 5 - Homework Assignment #include <iostream> #include <cstdlib> using namespace std; // // DECLARE FUNCTION HEADER FOR // CLASS ListNode class ListNode { public: ListNode(double v, ListNode *p) { value = v; next = p; } private: … |
| | Code will check whether the number entered is integer or not. [inlinecode]ignore[/inlinecode] extracts characters from the input sequence and discards them. The extraction ends when max characters have been extracted and discarded or when the character delim(\n) is found, whichever comes first. In the latter case, the delim character itself … |
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