51,593 Topics
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| | Hi, I am trying to compare two strings. When i enter two arguments on the command line 12 and 100, the flag1 should be set to 1 because (argv[1] =) "100" > (junk2 = )"13". But this is not happening. So, how can i check that the input arguments entered …  |
| | i have made this strstr() function,it gives the correct answer if it finds the correct string inside the another but the program crashes if it does not find the string,gives a runtime error,compliler does not give any error! here is my code: [code=c++] char *astrstr(const char *s1,const char *s2) { …  |
| | Hi, I have to create a hunt the wumpus game using c++ and using the parameters that my proffesor set up, but I am really confused and I don't know where or what to start with. This are the parameters and other stuff that my proffesor gave us. (ps I …  |
| | Hello, my name is Dallas. I'm (obviously) new to the site. I've spent the past couple of days doing absolutely nothing but trying to work on this program. I usually don't like trying to get help, but I've spent so much time on it by myself that I have no … |
| | So I'm working on a program "Master Directory Control", it gets all the information about all files in a directory (name, location, size, exists, etc.) and puts them into ListBoxes. That all works fine. There's a feature where you right click on selected file in the Name ListBox, and you … |
| | I have drawn a small box in a game, that I would like to be able to click it in order to bring up another Larger box that would contain various information, I have named InfoLarge() This is the Small box VOID InfoSmall () [ICODE]Rectangle(730, 390, 60, 17); draw(732, 405, …  |
| | Hi guys, When i run my programs in c i always use things like [code=c++] include "stdio" [/code] But then i see things like [code=c++] include "stdio.h" [/code] and [code=c++] include <stdio> [/code] I was wondering which one i should use and also why there are so many different ways. … |
| | Can anyone show me how to make this perform the calculation using the postfix data?? I assume I would have to read the post fix data one character at a time and code what to do with each character??? For example, if I entered this: 5 ^ 3 * 4 … |
| | Ok, I think my problem has to do with my rotation functions. It is not performing them correctly though I don't see where they are messing up. On a more complicated tree when it performs a rotation the structure of the tree becomes incorrect. Maybe some one can see something … |
| | Dear All, I am facing a problem in passing 2D array of pointers to a function. can any one give some suggestions on this. 1. How the Declaration fo the function should be ? 2. How to pass 2D array of pointers to that function? 3. How to access the …  |
| | Hi All, Could you kindly help me regarding the usage of array of pointer (1dimension or 2), I mean where we can use it. Regards, IDB |
| | Hello! I have an assignment in my "intro to programming class" and I am having trouble just getting started. We are suppose to take a txt file that has several lines of text - and create a program using "fin" to test each line to determine if it is a …  |
| | Hi Guys! Was wondering what I was doing wrong with this program. This a program that when a person enters a number, 2-9, it gives them the letters that correspond just like on your phone, e.g., 2 is a,b,c. They also have to chose if they want a switch statement …  |
| | Hi, I know this kind of stuff been wandering around. I did have a look through the search function but I haven't got the answer. This is the program to check whether the number inputted is a prime number or not. [code=c++] #include <iostream> #include <math.h> #define TRUE 1; #define … |
| | I want to plot a rectangle by mouse click in opengl. But I failed to do it, it's very comfued, by the way, the rectangle just exists in a flash, then disappear. [CODE] [COLOR="Red"]void OnMouse[/COLOR](int button, int state, int x, int y) { glRectf(a,b,0,-10); } int main(int argc, char** argv) …  |
| | Hi, I'm writing a C++ single-threaded Unix daemon that listens for data arriving at a port. The whole application logic is contained into an infinity loop. The problem is that the daemon consumes a lot of CPU cycles, specifically because the loop is being continuously executed. I’ve looking around for … |
| | I was just wondering, in all of the code snippets i see there is no #include "stdafx.h" in them, but i cannot compile a program without it. Is this a Microsoft Visual C++ that is the problem or am i just missing the point here? |
| | I am using RDLC and i want to add dynamic text in header as well as in footer and some images in to the header but i cant understand how to add it in same rdlc. i can add static text in header as well as footer and when i …  |
| | My professor has assigned a machine problem that asks us to write a program using cin.getline, strcmp_s, and strcpy_s to get a string of words and then count how many times those words were used in the sentence. I have searched online for a solution to my problem but I'm … |
| | I have to construct a class for strings. C++ already has one, but my assignment is a home-made version. I am very lost as to how to make the constructor work. I have toyed with a few things, but I was given a header file to follow and I have … |
| | Hey all I have a bit of a problem, I need a little help fixing this little error problem. The Error is "error C2668: 'sqrt' : ambiguous call to overloaded function" it is on this line of code: [code=c++] void myint::square() { // Output square root cout << "The square … |
| | I am making a word ladder and have gotten some headway on creating a tree design but for some reason in my insertion function I am getting an error saying that this is the "first use of this function" This function being my vector<node*>"children". (I have the area marked with … |
| | This program needs to create, sort, and search a novel array. Each novel in the collection will have the following attributes: Title Author Publishing Year Number of Pages The novels I will be sorting are in a file called data.txt I need to use bubble sort to sort the array … |
 | I'm having several difficulties with memory leaks in a program (I've been using "Visual Leak Detector" to check for memory leaks). I've simplified the code to the following: [code=C++]#include "vld.h" #include "vldapi.h" #include <string> #include <vector> class BaseFoo { public: BaseFoo() {} ~BaseFoo() {} }; class ButtonFoo { public: void … |
| | I have the function AddToText which is located in the Form1 Partial Class [code] public void AddToText(string text) { this.txtStatus.Text = this.txtStatus.Text + "\r\n"; } [/code] I want to call this from a different class so I do: [code] Form1 frm = new Form1(); frm.AddToText("Test"); [/code] I click a button … |
| | Hi guys, I have a question regarding C++ classes and polymorphism. I understand the concept of pointers and that polymorphism with respect to operators(+, -, etc...) means that the operators can have different meanings based on "context" (how they are used). My question is regarding class pointers. For example, if … |
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| | Hi! I've been having some problems in getting a hold of the current selected item. All the clicking works fine, but when using the up/down arrow key problems start occuring. Lets say item 0 is marked when the user decides to unmark it. If the user then presses the down … |
| | Hey guys, How would I make this program work without a "while" just using "if" statements. I know doing it this way is probably more efficient but there must be a way to do it with just "if" statements. Thanks! :) #include <iostream> using namespace std; int main() { int …  |
| | Hello I am trying to compile libwbxml so i can convert xml to wbxml. However i am not successfull, i keep getting alot of errors (I opened up the .dsw file and tried to build it. I have no prior knowledge of either VC++ or building any C programs). I … |
| | Dear guys, Here I'm gonna show u how to overload different operators in c++. First of all I'm going to overload unary operator(the operator that acts on one operand) that are `++` and `--`. so lets overload the `--` with a simple example. #include<iostream> using namespace std; class school // … |
| | I have made a game on c++. Can any one help me to improve it (by adding graphics) and making code short. [code] #include <iostream.h> #include <conio.h> #include <time.h> #include <dos.h> void main() { clrscr(); int i,a=21,b=0, c[5]={0,4,3,2,1},z; char x=15; cout<<"\n\n\n\n\n\t\t\t\t\t\t\tWelcome"; cout<<"\n\n\nRules:\n\n"; sleep(1); cout<<"1. There are 21 match sticks between … |
| | hi everyone i have written a simple program which asks for the colour and no of wheels of a vehicle. i used gets() for inputting colour of vehicle.but it was skipping that line. some body suggested me that it is buffer problem and use cin.getline() with getchar() function in while … |
| | How to make map with two kwys. I am using struct. struct Key { char * gi; char * offset; Key(const char * _gi, const char * _offset) { gi = new char [strlen(_gi) + 1]; strcpy(gi, _gi); offset = new char [strlen(_offset) + 1]; strcpy(offset, _offset); } ~Key() { … |
| | It seems like SO often I need to attach a "valid" flag to a standard type. For example - I have a function called "CalculateLunchTime" that I pass a vector of times. If the vector has 0 elements, they did not take a lunch, so the duration is 0 minutes. …  |
| | hi all , i need to return the value of tempdate to the main function .... any idea how i can do that ??? [code=cplusplus] #include <string.h> #include <sys/time.h> #include <time.h> #include <stdlib.h> #include <stdio.h> #include <iostream.h> char* incrementdate(int &func_days_int,char *tempdate) { char temp_dat[11],temp_mon[8],temp_year[5]; int cur_dat,cur_mon,cur_year; temp_dat[0] = tempdate[0]; temp_dat[1] … |
| | Hi, I am creating a hash table which is basically a pointer array of 6151 elements. I use it for chaining. But my code doesnt work properly. There's an error at T[i]=NULL and at function call. This is how it goes: [code=cplusplus] #include <iostream> #include <string> #include <vector> #include <fstream> … |
 | Hi all This may seem relly naive but I'm only new to C++. If, in the future I want to build charting software for stock-charts, etc and want a very professional and portable widget toolkit to use with C++ which one should I use and what should I be looking … |
| | i m making a program which initializes a 2d Dynamic array by first asking for the number of rows and columns,and then filling the array with random characters. Then i have to check for a three lettered array in the 2D array,(Horizontally,Vertically,Diagonally). i m having problem with the conditions for … |
| | can anyone please suggest me any library or programming method to plot contour of a surface using its x,y and elevation. Thanks in advance |
| | Hello, I'm writing a simple C# connectionless UDP application that communicates with a C++ connectionless UDP app. I could send from the C# to C++ using the following sets of functions fine: Send from C# to C++ C#: SendTo() C++: recvfrom() However, I'm having trouble receiving the C++ UDP messages … |
| | hey ol, i dnt hav much time left to solve des Q's.. can u plz guide me solving des... Fundamental Exercise /* class design, dynamic memory allocation and operator overloading */ 1. Write a program to implement Matrix class. • Implement addition and multiplication operation • row and col of … |
| | Ok is there any why i can call the base class this pointer or object from with in a derived class? Example: [CODE=cplusplus] class BASE { public: BASE () {} BASE(BASE & b){} virtual ~BASE () {} virtual void Method(){cout << "BASE::Method called"; return; } }; class DERIVED: public BASE … |
| | I am using RDLC and i want to add dynamic text in header as well as in footer and some images in to the header but i cant understand how to add it in same rdlc. i can add static text in header as well as footer and when i … |
| | Hi there! I have written a program with fixed costs for a vacation. I need to add sales tax in for the total amount but this needs to be floating. Also, I had intended this to be a user input based program, but without knowing the float code for calculation, …  |
 | Hey guys, I'm getting an error at lines #9 and #14. Could someone tell me what I'm doing wrong? [code=c++]StackType::StackType(const StackType & st) // copy c-tor { if ( st.topPtr == NULL ) topPtr = NULL; else { NodeType * stptr; // pointer to source Stack NodeType * p; // … |
| | Hi, I'm writing this code where I want to match a string with a signature. A wildcard '?' would mean it can skip 1 character. A wildcard '*' means it can skip 0 to 32 characters. For example, say I have: string "screwed" and a signature "screw?d" These two would … |
| | Hey friends, Started c++ not to logn ago and took right to it, up until now I have had no problems whatsoever. Now, with my specific assignment I have absolutely no idea what do to. I dont even know where to begin. I feel foolish and embarrassed and I'll i … |
| | I'm having a hideous problem with a program I'm working on involving a map with pointer keys. The keys are pointers (to objects on the stack) and the data are pointers (to objects on the heap). It's the list of references for a handle class, so that if handle.destroy() is … |
 | I have to write a program that outputs the length and width of a rectangle and then calculates and outputs the area, using a class called rectangle... I thought I was about done, but when I run the program it says width, length and area are being used without being … |
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