51,593 Topics
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| | I am trying to merge two vectors, alternating elements from both vectors. And if one vector is longer than the other, alternate as long as possible then append the remaining elements from the longer vector. This is what I have so far: [CODE]#include <iostream> #include <algorithm> #include <vector> #include <iterator> …  |
| | I need to find the difference of 2 sets. below are my functions for the union and intersection of sets in my driver-file. Is the difference set a combination of the two? [CODE] IntegerSet IntegerSet::unionOfSets(IntegerSet b) { IntegerSet c; for ( int i = 0; i < 101; i++ ) …  |
| | [CODE] I am finishing up my atm program and have an issue with my program. When I withdraw more than 300 it does not return an error message or show the amount withdrawed in my program. I am not sure if this is related or not but the deposit and … |
| | So I have to write a program to output whether a point is inside or outside a circle, but I can only get the program to ask me for one set of coordinates. [CODE]#include <iostream> #include <cmath> #include <string> using namespace std; bool promptYesNo (string question); int main () { … |
| | Write a program to process bowling scores for players on a team. Calculate each player's series (the sum of his bowling games) and his average game score. Sum the players' scores for each game, and calculate the team's total for each game, the team's series, and the team's average game … |
| | I am a biology student taking a required C++ class. As a result, I am very unfamiliar with programming but I definitely have gained a new appreciation for it. We just finished cin and cout objects two weeks ago and this is our assignment. I have some of it finished … |
| | I have a project where i need to create a C++ class that will use very long integers. The software should handle additions of integers of up to 50 digits. I already finished creating a class for sequence that we have to use too store the numbers. But my question … |
| | Hi, My program keeps coming up with an Access Violation after I moved the code manipulating my linked list from the main function to a sub function. Looking at it with the debugger, I found that the sub function destructs the linked list, and then the main function attempts to … |
| | [code]#include <iostream> #include <cmath> double f1(double); double f2(double,double); using namespace std; int main() { double dx, dy,x=1.0, y=1.0,xnew,ynew,eps=0.0000001,err=1.0,m=1; while ( fabs(err) > eps ) { dx= -f1(x)/(3.0*sin(x)+cos(x)); dy= (f1(x)*sin(x)+f2(x,y)*(cos(x)-3*sin(x)))/3*sin(x)*(cos(y)+cos(x)*cos(y)); xnew= x+dx; ynew= y+dy; m = (xnew*xnew)+(ynew*ynew); err=sqrt(m); } if ( fabs(err) < eps ) cout<< "dx= " <<dx<<endl; cout<< "dy= … |
| | I would be very happy if you could explain to me clearly to understand the insertAtRear function. I want to make an insertation like [CODE] void insertAtRear(int i, string s, string n) { //??? } [/CODE] and than also need to disply the inserted data by using printList() with and … |
| | I would be very happy if you could explain to me clearly to understand the void insertAtRear() function. I want to make an insertation like void insertAtRear(int i, string s, string n) { //how can i implement this function // i need to } |
| | create a C++ program, using a queue that will interface to your car, to read out to you directions as you drive. You have been at a hockey game at Rexall Place. So you ask your GPS for a route home to your residence at King’s. You enter each instruction … |
| | hi, i created a program to use bubblesort to sort numbers in an array, but when i try to display the new array, nothing appears on the command prompt. after some exploring, i figured out that it gets stuck in one of the loops in the sorting function. here is … |
 | I'm using Borland C++ 5.5, I code my programs using Edit, I compile and run my programs using console. Before, I was using Windows XP and I had no problem using Edit to code, compiling and running my programs using console. Also my programs were in [B]D:\My Documents\Borland\Programs [/B]and it … |
| | Hi I only have a simple query I am relatively new to c++ and I am trying to create 10 randomly placed items in a grid. I've used the following for loop: [code] for(int x=0; x<10; x++) { array[n1][n2] = aliveG; } [/code] and it only displays the item once, … |
| | I have finished writing a program that uses Linked lists and reads in input from a txt file. When the program executes there is no output. I have been going through the code for awhile now and there are no syntax errors and i can not seem to find what … |
| | hi all can help me about code reverse 123 ->321. put help me |
 | I have made a simple test application that I use to paint objects while I study and try to give them physics such as gravity, velocity, wind, momentum, etc. I have the app setup like this: [CODE]WM_PAINT PaintFunction(); break; DWORD CalculationsThread() { while( 1 ) { //-_-_Calculations here SendMessage( WindowsHandle, … |
| | A want to create some kind of global memory table. Every time when I create a specific kind of object, I wolud like to register it in the table, and save some data. Let assume that this "memory table" is a map, and a global variable. Let assume that I … |
| | i need to write a function that will take these family codes and convert them into names, as shown below. i'm at a loss as to what to do. i'm thinking i need to do some kind of case thing. case 0 = drake; break; case 1 = spencer. i … |
| | ok so heres my script [CODE] #include <iostream> using namespace std; using namespace std; int Unitedstates() { int action; char action1; cout << "you have chosen to learn more about the united states. Now What will you do?" << endl; cout << "1. The quality of doctors in the United … |
| | The Assignment is as follows: Write a program that allows the user to enter foods and their calories into two arrays. Allow for UP TO 100 entries, although the actual number may be way less. When the user types "done" then stop asking for new entries. Next, prompt the user … |
| | I am trying to write a program that finds sin(x) using the function double sine( double x, double tolerance, int limit, int & nTerms). I know I have to use the taylor series but I am having trouble getting started. [CODE] #include <iostream> #include <cmath> using namespace std; double factorial(double … |
| | I need to scan for the following input type using C: number letter number so i used the follwing: scanf("%d%c%d", &n1, &lett, &n2); Unfortunately with this, whenever I attempt to input a single number and press enter, scanf continues to expect another input. How can I adjust the program so …  |
 | Hi, After several google searches, yes I did actually bother searching, I was hoping someone would be able to help me out. I'm trying to figure out persistent hash tables and the internet seems to be woefully inadequate in information, I was hoping some one here had a link or … |
| | Hi everyone, This is my first post on daniweb! I'm fairly new to C++ and am trying to add sound to my application using FMOD. Now, I have managed to get sound playing correctly using FMOD, but I'm now trying to get all the sounds I want loaded, into a … |
| | Hello, I am trying to implement a for loop which fills (and re-sizes) a temp matrix (temp_data) based on a column value criteria from another matrix (data). The data matrix comes from a text file which has the format: a b c d e f g h 1 i s … |
| | Here is the formula i'm suppose to use: i'm suppose to to write a complete program with a function using two parameters to calculate: x(!)^n, where x(!)^n = x!! ... ! use BigInts For the calculations ----- n times this wis what I have, i don't think it's right, if … |
| | I wrote a code to read the parity check matrix named "tannergraph" which is stores in a sparse format to save space. It is in the following form: Line 1: Number of Variable Nodes(VN) Number of Check Nodes(CN) Line 2: Column weight Row weight Next VN lines: degree of the … |
| | My problem is not serious, its just a question about the most beautifull solution. Maybe somebody has a better idea! I have a mathematical class having some numerical functions. It is convenient for me, and speed up the program, if I introduce a member array called "memory", and store the … |
| | I need help with understanding how to fix my for loop and the if tests. Originally, in the for loop, for the end value i had k<=3..but this is wrong because i need to loop to keep going until it passes the test. So i was told to try setting … |
| | Ok I got the code to work but with some errors. First when i print out the aorted array to the file it is sorted escept for one number in the beginning second it gives me a negative number whihc i believe is a pointer how can i fix this? … |
| | hi i want to read the joystick data to send through a socket. i try to understand the direct x example for joystick inputs but its difficult . if there are any solutions please reply or if there is a tutorial please send me links to joystick inputs  |
| | Hello. I am quite keen with the win32 api but am tired of the standard windows visual styles (XP/Vista/7) and am wondering how to create my own. Have googled but not found any information, just point me in the right direction. Thank you very much. |
| | Hello! Im having a problem with the following code structure. The code compiles without problems but when i start the program i get an "exception: __non_rtti_object at memory location...". In the constructor of the model-class i still can get the object information of the node-class through the base pointer. Once … |
| | Hi! I am making a project about doublepointers and inheritance. Have some small issues that should not be difficult to resolve, but I just cant get a grip of it. The task is to add two types of vehicles that have some of the same characteristics but not all. I'm … |
 | I'm trying to understand how static ints work within classes, and I've fallen on some code that I don't quite understand how the answers come out to be what they are showing. [code] // static members in classes #include <iostream> using namespace std; class CDummy { public: static int n; … |
| | i am a University student pursuing a degree in computer science, it seems as though i really suck at validating things... well I just don't really get the concept i know its conditions but i when i try one it always seems to crash my program I've been trying to … |
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| | Can some one give me some code on how to use windows.h..... im making my project, about ATM, i want to make it look good so i need some code on how the use windows header. I saw this person using a goto(x,y) code... and I saw his exe file. … |
| | I'm getting this error at the end of my program... [code] *** glibc detected *** ./a.out: free(): invalid pointer: 0x00617ca0 *** ======= Backtrace: ========= /lib/libc.so.6[0x684ac1] /lib/libc.so.6(cfree+0x90)[0x6880f0] /usr/lib/libstdc++.so.6(_ZdlPv+0x21)[0xc986f1] ./a.out[0x804ce2f] ./a.out[0x804973d] /lib/libc.so.6(__libc_start_main+0xe0)[0x631390] ./a.out(__gxx_personality_v0+0x7d)[0x8048de1] ======= Memory map: ======== 00110000-00111000 r-xp 00110000 00:00 0 [vdso] 005fc000-00617000 r-xp 00000000 08:01 687043 /lib/ld-2.7.so 00617000-00618000 r-xp 0001a000 … |
| | Hi, I would like to know if I could do this: if i were to enter 5 numbers, it would go like this: 5 4 3 2 1 I want to know if I can do it like: 54321 Basically I don't want the insertion to go to a new … |
| | Hi; I have build an MFC application in Release mode using vs 2005 (windows XP) but when I run this exe on another PC (WInXP/Windows 7) with VS 2008 or PC without VS, it doesn't run. I used Visual C++ redictributionpackage and . NET service pack 2.0 but it works … |
| | Hello everyone, I am C++ beginner and I have a basic questions regarding classes Referring to the code below, I am trying to access x and y from the coordinate class in method abc after having run the place method. I hope this is clear Here is my code: class … |
| | In Excel, the columns are identified by a b c .... z aa ab ac .... az ba bb bc .... yz za zb zc .... zz aaa aab aac .... These identifications correspond to the numerical values as 1 2 3 .... 26 27 28 29 .... 52 53 … |
| | This is the program i'm trying to develop. It's not an assignment or anything. I'm just a newbie trying out new stuff. But I'm getting frustrated with this. [CODE]#include <iostream> using namespace std; //========== struct ========== struct nodeType { string song; int rating; nodeType *link; }; //------------------------------------------------------------------------------ //========== function ========== … |
| | Hi there, Looking for some advice regarding the following hierarchy structure: [url]http://i40.tinypic.com/9a1us0.jpg[/url] I'm storing base class pointers in a std::list in my program: [CODE=c++]list<Vehicle*>mylist[/CODE] Is it possible for me to use Pure Virtual functions in the base class? For example: [code=c++]virtual int getMPG() = 0;[/code] Seems fine, as all derived … |
| | please solve this question for me now.. thanks.. CSC1103 STRUCTURED PROGRAMMING Lab Test 2 Problem statement Write a program to read N data items into two arrays, X and Y, of size 10. Store the product of corresponding elements of X and Y in a third array, Z, also size … |
| | Hello i want to retrive information of various fonts used in an RTF file.so that i can use it in my RichEditCtrl class. |
| | Hi all, I am in the process of optimizing my code and I was wondering what the fastest way is to compute trig functions. I profiled my code and to my astonishment discovered that one of the most time-consuming processes is computing cos(theta) and sin(theta) using the implementation of cos() … |
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