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Hi this is my question , and I have some error in my code ,and I cant correct them ,and I am asking if you could help me ? this is the question : Create a class called BloodDonor that maintains information about blood donors in a blood bank having … |
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I have an assignment to write a recursive function that takes one integer variable and output the integer in reverse order to the screen. I've tried converting it to a char array(c++ "string" class not allowed) but could not get a counter to work. I can reverse an int array … |
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I would like to take a screenshot of a region of my screen programmatically (so I can do it every time through a loop, for example.) Does anyone know how to do this? I guess it would involve the win32api - I've not used this before so any hints would … |
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Hi all, Does anyone know how to quickly (i.e. O(log n) time) insert items into a sorted list? I'd prefer an existing working function if available; I didn't see any appropriate ones in boost or stl. Some background: I'd like to keep a constant sized sorted list, and insert items … |
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Hi all, I'm writing a simple application in C# but I'm having an annoying ArgumentOutOfRangeException thrown by Invoke() saying "Text length must be less than 64 characters long.". Is this usual that strings passed through delegates have to be shorter than 64 characters? What's the usual neat way around it? … |
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Hi all, I have an application with a ListView of remote files. I'm trying to implement a drag-drop of these files between my application and e.g. windows explorer. I have an object implementing IDataObject used for the DragDrop operation and the files are passed in a string[]. The problem is … |
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i tried the following coding .it compiled without errors but gave absurd results during runtime. can u pls help me with it? [code=cplusplus] #include<iostream.h> #include<stdlib.h> int main() { int i; cout<<"ten random numbers for the range 0 to 50"<<endl; for(i=0;i<10;i++) { cout<<rand()<<endl; return 0; } }[/code] |
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I am having trouble devising a method to multiply 2 matricies that are formed by dynamic one dimensional arrays, for this case i just used matrix1 and matrix2 To access elements that are on rows 0 to n-1 in either matrix i have to use this method: ((rows - 1) … |
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Code works, however i'm having problems with reverse string- i cant figure out how to index the elements. for cycle returns errors, what else could i use? The end goal would be to compare string line with string reverse. If adequate elements match its a palindrome. [code=c++] #include <iostream> #include … |
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i need some help/idea in coding a matrix class capable of giving its transpose matrix, inverse matrix & also the determinant of the matrix i am totally a newbie in c++; & learing all the way i just got the thought that to find the determinant it would be recursive … |
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I would first like to start this post with a sincere Thank you to everyone who has posted and will post help for my problem. Without you guys, I would be banging my head on my desk. Well, I got another problem. This time with a function that takes a … |
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Hello, I need to write a programm in C++ to send a sms from a PC to a mobile phone as a part in my project, so can you please help me? Reegards, Noora |
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can anyone help me!? i have to create program to search word from text file, but i don't know how can i match word from input to text.. Can anybody help!!!?? |
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Hi, everyone: I want to create an infinite array, where normally we initialize an array like this: [code]int array[10];[/code] There is 10 spaces in the computer reserved for array[]. However if I wish to have an array with no limit space, but the number of spaces of an array is … |
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I'm working on a project implementing Dijkstra's Algorithm. The project involves reading from an input file and the format of the file is as follows: - The first line of the file tells the number of total vertices and the number of edges (n, m) respectively. - The rest of … |
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I'm attempting to implement the trapezoidal method of calculating the integral of a curve. It's supposed to be the measure of water flow out of a tank's release valve. The water flow is a function of time in seconds where Y is the rate of discharge and X is time. … |
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Hello. I am having problems with a program I've written to find the roots of a cubic equation using Newton's Method. The user inputs the coefficients in the expression (real) and an initial guess (real or complex), and the program is supposed to return a root of the function. However, … |
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Hi, I have written a v. small VB.NET program that spawns "cmd.exe" using Process, redirects stdin/out/err; works OK so far. Does anyone know how to get : * the details about the process currently running (if any) under cmd.exe (like how the command shell displays 'c:\windows\system32\cmd.exe - dir /s/b' when … |
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I'm trying to recursively search through directories and pull out any files or subdirectories. This is the code I have: [code=cplusplus] int readDir(string directory, vector<string> &fileList) //directory is the name of a direcotry //fileList is an empty vector DIR *dir; struct dirent *ent; if((dir = opendir(director.c_str()) == NULL){ cout<<"Invalid Directory"<<endl; … |
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A pointer points to a memory location containing a specified value right? If a pointer is defined without something to point at, it can point anywhere, right? Here is my question: What are the practical uses of pointers? I mean why wouldn't you just make a reference to the variable … |
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I am searching an efficient algorithm to find all the palindromes in a string(actually I have to find the largest palindrome in a string).. Here is my code [code] string palindrome(string str) { int n=sz(str); for(int l=n-1;l>=0;l--)//Palindrome can be of any size. { for(int i=0;i<n-l+1;i++) { int j=i+l-1; string str2=str.substr(i,j-i+1); … |
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This code Associates each number with cards, so 1 = ace of hearts/spades/diamonds/clubs, 2 = 2 of clubs/spades..... and so on so here is the code [code] void DeckToCards(int Deck[]){ //Sets each element into Cards; for(int i=0;i<52;i++) { switch(Deck[i]){ case 1:{ if(Deck[i]==1 && i<14)//Clubs char Aces_C[]= " A (of clubs)"; … |
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Here's what I'm trying out: [icode]Substitute characters into values with no set left bits; check if the next position is a vowel(or whatever), turn it into a value with no right bits set, join the two characters into a single byte, delete the unused position now.[/icode] Here's the code using … |
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hey everyone im making an gui in C++ which needs to retrieve windows registrys such as windows version etc. however im stuck on some code i was hoping for some help please. [CODE] void GetSystemInformation(void) { float fprocessor; HKEY hKey; DWORD processorspeed; DWORD datasize; RegOpenKeyEx(HKEY_LOCAL_MACHINE,"Hardware\\Description\\System\\CentralProcessor\\0",0, KEY_QUERY_VALUE,&hKey); RegQueryValueEx(hKey,("~MHz"),NULL,NULL,(LPBYTE)&processorspeed,&datasize); fprocessor=float(processorspeed); if (fprocessor>1000) … |
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I am having a problem with the results that I am getting when I run my program, according to the math i wrote in the program when I enter these results object's x co-ord = 0 object's y cor-ord = 0 object's heading = 45 degrees object's distance travelled = … |
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Hi , can any one tell me how to generate an unique number ? this can be done in C# with great ease. But i wonder how to generate tat in c++:ooh: |
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I'm looking at this code and I'm not sure what it prints (I don't have a C++ compiler to run it). However, I also would like to understand why it prints what it does? hope someone can help, here's the code: [CODE] class A { public: virtual void p() { … |
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Hi. I have written a small test socket program that uses a background thread that accepts tcp connections and adds them to a connection list that is accessed by main(). When a connection is opened, then later closed, recv() is called (see line highlighted in code below), which throws an … |
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Hello everyone, I know there is a build in real time clock inside the computer and I know it's possible to use this clock when you write a program on Assembler(using an interupt that I don't remember at the moment),is there a way to use the real time clock while … |
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Hi all, Does anyone know if it is possible to write a C++ macro, which will force the compiler to construct Pascal/custom style string constants during compilation? The basic idea is to avoid unnecessary run-time construction from C-style to custom-style string literals. For example, when evaluating the expression {String2 = … |