51,593 Topics
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| | Hey guys, i'm new here and i'm also new to C++. I have a task where I have the user input a file name and then the program loads it into an array of type struct then finds the top 3 values and outputs them. I am so stuck right … |
| | hi i have anew class which my dialogs should be based on it instead of being based on CDialog. two weeks ago ...when i inserted a new dialog and create a new class for it ..i was able to choose my new class from the drop down list. but now … |
| | Hello!! I have a FormView and I added a Tab Control... I'm able to add pages (tabs) to it but I want to be able to have a different Dialog View on each tab??? Or how can I have different controls on every tab?? I'd really appreciate all the information!! … |
| | I have a general question about Diagram in VC++ 2008. If I want to draw a diagram out of a serie of numbers for the coordinates X and Y in a Diagram. Is there any classes/ built in methods for this. - Is this very difficult things to do in … |
| | I keep getting this error: [QUOTE] debug/moc_funccntrlparams.o: In function `qt_noop()': /home/f07/xxx/QT/include/QtCore/qglobal.h:1425: multiple definition of `FuncCntrlParams::type_pairPotList' debug/interpotcntrlparams.o:/net/home/f07/xxx/workspace/tramontoGUI/interpotcntrlparams.cpp:95: first defined here [/QUOTE] But I'm not defining type_pairPotList any where in the interpotcntrlparams.cpp file. This is what my code looks like at line 95 in interpotcntrlparams.cpp. [CODE] #include "funccntrlparams.h" . . //line 91 … |
| | Hi All, I am using RWZoneSimple object and RWTime object to check whether a given Date is falling under DST (Daylight Saving Time) or not when my server (HP-UX system) is in Non DST time (by having TZ=US/Arizona). I have created RWZoneSimple with the date that falls in DST ("05302008"// … |
| | okay, i know i might be boring with my questions but could someone tell me how can i read an array of floats mixed with ints and then print them out same as they were on input...? typecasting thing again? anyone knows a good book i could use to stop … |
 | I want recursively fill members of one structure, it looks like this: [code=cplusplsus] struct OPTIONS{ string sDirectoryName; vector<string> vExtensions; int uOperationId; } structCurrentDir; [/code] after filling all members I need to push this structure to another vector: [icode]vDirectories.push_back(structCurrentDir); [/icode] But then I need reset all members and I have problem. …  |
| | Hey, I need a little bit of help figuring out how to find the minimum and maximum of a particular data in a file. Should I treat the file I'm opening as an Array in order to find it or is there a certian function that can do this? |
| | hi, Please tell me what the below mentined code is doing? If i pass String s as `my name is "xyz. and " i am writing `. what should be the output. Thanks in advance void parse(Block<String>& f, String s) { int inquote = 0; int nf = 0; int … |
| | Hello, as an exercise in c++, I should make a parking lot, the classes are: Transport( with local protected variables color and max_velocity), Car, inherites from Transport(with extra variable model), Truck, inherites from Car(with extra variable model weight), Bike inherites from Transport(with extra variable model gear), and Parking which is … |
| | mm.., hello. First, i'm kinda new to this... kinda, anyway, i'm supposed to write a prog that handles large numbers, like 200 digits long, by storing them in a string of characters. it's supposed to have a class with functions for all the mathematical operations, reading, and writing, maybe into … |
| | How can I convert char* to a char value? can someone reply me asap |
| | how can I do this?? can someone help me [code] char * abc = "as,df,ert:we,rt,yu:ee,rr,tt"; Class x { char * a,*b,*c; } vector<x> vtr; I want to extract data from abc like, while(there is a ":") { x.a= as; x.b=df; x.c=ert; vtr.push_back(x); }[/code]  |
| | Hello all, I'm new to hash tables etc. and for some schoolwork I need to make one. The hash table and hashfunction itself aren't the problem. The "problem " I wish to solve lies in the display function of my code. I like to write a function so that it … |
 | Hello everyone! I am learning sound programming on Linux. In my app I am using ffmpeg to decode the audio, and then ALSA to pass it on to speakers. So far everything is fine - the packets are retrieved, stored in a queue. After that, the packets are read from … |
| | I ran into a roadblock developing my code for an assignment to sort a linked list as it is entered (insertion sort). We've had sketchy classes lately so the idea of linked lists is really rough for me at the moment because it's a little hard to understand. This assignment … |
| | hi i have an application where the user need to save his information. the first time he saves...a save dialog appears and the process goes as normal . but here is my question.. if he add any modification to his info and press the save button again ...i dont want … |
| | Hello, everyone. I need help with a bank account class. I was supposed to create a class called Account which houses an attribute called balance that is protected and returns a double data type. There are some other things required of me which have been completed in the coded below. … |
| | Okay, so i have an idea...that looks like it should work. I'm supposed to be able to multiply for example: 1234567812345678912345678*1234562345673456. My idea was to put each number into a string, and then make a matrix to store the values of each digit multiplied by each digit... i'll put an … |
 | Hello all I am beginner in C++ and i have some questions In many languages there are included libraries for many uses such as libraries for downloading files / uploading files using ftp connection ...etc but in C++ i cant find these libraries my question ....... must I use libraries … |
| | Hi, I have the following class and main method: [code=cplusplus] class Employee { vector<string> v; string name; int i; public: Employee(){} Employee(string &n): name(n), i(0){} void read(vector<string *> &vec) { string n; for(int i = 0; i !=3; i++) { cin>>n; Employee e(n); vec.push_back(&n); } } }; int main() { … |
| | Help - I am having the following errors repeatedly so I know it is a consistent mistake I am making but I just can’t see what it is. I already fixed many other errors and now it’s just this.....so close...... :confused: My errors are the following. I did not put … |
| | What are the major differences between C and C++ programming languages?? |
| | I am working on code to calculate the factorial using below function: int factorial (int num) { if (num==1) return 1; return factorial(num-1)*num; // recursive call } And I need to calculate the numbers from 1 to 255… The problem occurs when it reaches number 35 and above, it starts … |
| | I have a code like below that when pressing a button, panel1 and labelText1 should be seen. Then I will put the process to "Sleep". After this, labelText1 should be emty ("") and labelText2 should write "TextMessage2": Then I wil put the process to "Sleep" again. And last put panel1 … |
| | First time posting, this seems like a wonderful community. Okay, so I'm new to C++ (mostly worked with java) and I'm trying to write a program that will read in a plain text file (a short paragraph) and take and place each word in the text file and place it …  |
| | Hello, I have recently installed Microsoft Visual C++ 2005 Express Edition, and right off the bat when trying to make a new project I find myself unable to make a Win32 Windows Application, when I go to check the bullet that says "Windows Application", the option is grayed out. I … |
| | How can I type cast char* to a long value? e.g. char * abc ; long xyz; xyz = abc???? |
| | Know of any good ebooks? : I have recently purchased the resell rights to about 600 ebooks so that I can post them on my website for my registered members only. I've purchased all of these ebooks for under $20. I'm just wondering if there is any ebook out there …  |
| | I'm trying to create a class inside a header file so that all my files can access that 1 class and only use that one. This is what I have so far. ---------- Window.h: [ICODE] class Window { public: Window(); ~Window(); /* FUNCTIONS */ HWND OpenWindow(LPCTSTR, int, int); /* VARIABLES … |
| | Hi, I recently watched the movie Iron Man. While making his first suit, Tony Stark apparently is using C++ on the laptop in the background. Is this C++ and if not what is it? |
| | Hi, Why the program skip 'read value' in second time? First time reading value is ok, but the problem will get after pressing 'Enter key' for the next time read. [CODE] //array of pointers to person objects #include<iostream.h> class Person { protected: char name[40]; public: void getname() { cout << … |
| | I have been searching for days to find an Http Client in C++ that I can use. I am assisting in a research group involving camera recording based on sensor detection and am responsible for making the interface with the cameras. I have some work that was done before I … |
| | could someone please check this code and tell me where i went wrong... it always gives the result 1.00000 but as you can see in the for loop it shouldn't be like that. [CODE]#include <cstdio> int main(void) { int n; float s = 0; scanf("%d", &n); for(int i = 1; … |
| | Whenever I start my program from the command line, it works perfectly. When I try to use the icon on the desktop, it gets to the last cin statement and terminates. I have no idea why this would happen. Any insight? |
| | :!: Write a program that reads in an m by n matrix row by row, then reads in an n by p matrix row by row, and then computes the product matrix and displays the two matrices, as well as their product matrix on the screen. Use integer values for … |
| | lets say I have a class named MyClass, and a variable named val, what does the following statement mean? i know its dynamic allocation, but what does the ** indicate? MyClass **p1 = new MyClass*[val]; thanks for your help. |
 | I have about a 1gb data file that needs to be read at the beginning of my program. This takes about 2 minutes to do. I feel like the answer is "no way", but here is my question. In matlab, there is the concept of a "workspace". I can ready … |
| | 01. ) during sorting , if we wish to swap the items in 2 positions , we simply swap the pointer values and leave the main data table unchanged:: what is a possible advantage and disadvantage of doing this .. ?? 02. ) what would be the effect of incrementing … |
| | [B]Okay i thought i have solved the problem i had obviusly with ur help guys but i guess i was doing it wrong, here is what i am suppopse to do:[/B] BACKGROUND This is the same as the DNS pointer problem except ypou must structure your code into a class … |
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| | hi how can i move from one dialogbox in one project to another one(dialog box)placed in different project? for example...press abutton in dialog A -> move to dialog B.. any suggestions any way that could help would be appreciated thank u all |
| | Are there any functions to calculate, or common techniques to estimate, how much memory a C++ script is consuming at a given moment/place in the code? Maybe some built-in function that keeps track of bytes used?  |
| | am trying to delete an element from my list but am having a problem..i have managed to position my pointers well but av failed to to the actual element. i.e user enters a number to be deleted from the list..here's the bit of the deleting code that i have been … |
 | Hey, when I run this code: [CODE=Cplusplus]else if(strcmp(buffer,"#itemSprite") == 0) { char* sprite_filename = ""; int trans_r; int trans_g; int trans_b; int width; int height; int numFrames; int numCols; int frameChangeDelay; fscanf(file,"%s",sprite_filename); fscanf(file,"%d",&trans_r); fscanf(file,"%d",&trans_g); fscanf(file,"%d",&trans_b); fscanf(file,"%d",&width); fscanf(file,"%d",&height); fscanf(file,"%d",&numFrames); fscanf(file,"%d",&numCols); fscanf(file,"%d",&frameChangeDelay); item->SetSprite(sprite_filename,D3DCOLOR_XRGB (trans_r,trans_g,trans_b),width,height,numFrames,numCols,frameChangeDelay); }[/CODE] I get an error on this line: … |
| | I want to change the background color of the output screen in Dev-C++. How can I do that? I searched the Internet but didn't find any. Any help on which function should I use?  |
| | please help me in writing a code to implement stack using arrays , does stack follow LIFO or FIFO principle? |
| | Here i have problem with ctype.h library .I think i use correctly,but i ahve an error on it. This is the code. [ICODE]#include<iostream> #include <ctype.h> using namespace std; int main(){ char letter; int num; int isdigit(int letter); int isupper (int letter); int islower( int letter); int small=0; int capital=0; int … |
| | hello all, can somebody tell me what's the use of protected default constructor & protected copy constructor in c++. |
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