49,761 Topics
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 | why doesn't this work? [CODE]int main() { fstream file; char output[100], pasword[100]; int a; const string x("Yes"); const string y("No"); string z; char b; cout << "\nEnter correct password to continue: \n" << endl; cin.getline(output, 15); if(output == "file.txt") { cout << "Change password? Type Yes or No. \n" << …  |
| | [code] main() { double **vals = NULL; function(vals); } [/code] prototype : [code] //some other dll void function(const double**); [/code] it gives me error : cannot convert double ** to const double **. and yes i dont want to put extra burden on the user side(in main function) to const …  |
 | Hey again! I ran into a new problem in my university course exercises. Basically, I'm trying to read things from a .txt file. Every line is supposed to get converted into an object called "Client", and lines are formatted like this: <account:int> <firstName:string> <lastName:string> <balance:double> I have written my own … |
| | Please give me a sample code in MFC VC++ of CMovingButton move to left and move to right. |
| | I have recently learned in school about the dreaded diamond.And I wrote a program using virtual inheritance to overcome the problems.I use g++ and I have the following errors with this program, [CODE]//doing to create an illustration for dreaded diamond #include<iostream> using namespace std; class vehicle { public: virtual void …  |
| | Iam using ubuntu 10.04 LTS.I have a problem in including graphics.h in the g++ compiler I am using.I have nearly tried all the possible solutions given while i googled about it. Please help me .I am a beginner to programming. |
| | I need to write a function that sorts a two-dimensional array using this header: [CODE]void sort(int m[][2], int numberOfRows)[/CODE] my code is supposed to primarily sort the rows and secondarily sort the columns. The program is supposed to take ten points entered by the user and sort them. I cannot … |
| | hello , i have an trouble in switching between graphics mode and text mode i have an interface by using graphics mode and when you press in a key of it will transfer to a window by text mode when this operation occur the dimension of the second window is … |
| | how would one define RANDOM FILES as well as suggest ways of creating and updating them in Visual C++? |
| | I'm creating a logfile interpreter program that consists of two editboxes. The first editbox contains the original logfile code, and the second editbox contains the equivalent code of the first editbox in user-readable format. All I want to do now is, everytime I select or highlight a specific code in …  |
| | hey my name is duplaix..am new in c++ so i need help! I have to write the following set of c++ functions ï‚· fromBinaryToDecimal: The function must accept a pointer to a one-dimensional, dynamically allocated, Boolean array together with an integer representing its length as parameters. You may assume that … |
| | Hello everyone! Im new to programming and Im working on an assignment but I keep running into trouble. My assignment is to make a trivia game and although I have made pretty good progress, I am stuck on one particular part. The part I am stuck at is I am … |
 | Can someone explain to me, the purpose of the "public" and "private" options of a class? |
| | The memset function declared in memory.h is declared this way... void* memset(void* dest, int c, size_t count); and the MSDN example of its use I have shows this for setting the 1st four bytes of a buffer to a '*'... memset(buffer, '*', 4); The 2nd parameter confuses me a bit … |
| | Can you recommend a free C++ compiler and editor under windows which is good for error tracking? I mean, I can step the program line by line, and check the values of variables? |
| | hi everbody I was opening all files in a certain folder I've used WIN32_FIND_DATA, FindFirstFile, FindNextFile. it works well but for certain extension that i ask the user to enter i.e it will get only all the files with the extension given by he user and ignore any thing else … |
| | take two following classes: [CODE=c++] class Test1{ public: Test1()=default; Test1(char in1,char in2):char1(in1),char2(in2){} char char1; char char2; }; class Test2{ public: Test2()=default; Test2(char in1,char in2):char1(in1),char2(in2){} private: char char1; char char2; };[/CODE] I know in c++0x both of these classes are considered as POD types and we can initialize objects of them … |
| | take two following classes and their constructors as samples: [CODE=c++] class One{ public: One(int a,int b):adad1(a),adad2(b){} private: int adad1; int adad2; }; class Two{ public: Two(int input[]){ for (int i=0;i<10;i++) araye[i]=input[i]; } private: int araye[10]; };[/CODE] considering objects with static storage duration, I think first constructor can be applied during … |
| | How does an optimizing c++ compiler determine when a stack slot of a function(part of stack frame of a function) is no longer needed by that function, so it can reuse its memory? . By stack slot I mean a part of stack frame of a function, not necessarily a … |
| | [B]Tic-Tac-Toe Game[/B] Write a program that allows two players to play a game of tic-tac-toe. Use a 2D char array with three rows and three columns as the game board. Each element of the 2D array should be initialized with a space. The program should work as follows. 1. When … |
| | I was having an error, it says cannot convert string into int..i have no idea how to convert string into int. My teacher asked me to read 5 students names into the array..help me pls.. [CODE] #include<iostream> #include<string> #include <stdlib.h> using namespace std; int search(int data[], int size, int value) … |
| | Quick help please I am writing some data to a file but I do not know the information required in the third line until after the file is completed is there a way to point the ofstream back to the beginning of the file so that i can edit it …  |
| | Hi everyone; I have a character array of 13 elements and I already defined the first 5 ones. The rest chars are constant so all I need to do is assign the chars between 6-12 instead of writing them one by one.To make it clearer, say my string is "ILoveYouMary" … |
| | *I need help solving this. Stuck half way. Would someone mind giving me an example of their program of this?* The local t-shirt shop sells shirts that retail for $12. Quantity discounts are given as follows: Number of shirts Discount 5-10 10% 11-20 15% 21-30 20% 31 or more 25% … |
| | Ok, this has got me banging my head against a wall. I have a structure defined in a header file. It get initialized in my "main.cpp" file, then later in a separate file "readconfig.cpp" it gets accessed to store information. I haven't been able to get it to compile except … |
 | Hi, what are the classes that cannot be instantiated in c++? I know that one of the ans is Abstract base class.what is the other one in c++? could you please help us? |
| | I am new to programming but when I took my class on Visual Basic it seemed so easy and I learned it so fast. It seemed like a giant puzzle. Now I am taking a introduction course to C++ and I cannot seem to grasp the material at all. When … |
| | Is there a macro that can get a text as input like "abc" and then extract characters in that text and generate a code using them, something like "{'a','b','c'}" ? thanks. |
| | Suppose we have following two classes: [CODE=c++] class Temp{ public: char a; char b; }; class Final{ private: int a; char b; char c; public: Final(Temp in):b(in.a),c(in.b){} //rest of implementation };[/CODE] can we initialize an object of the Final class with following syntax in upcoming c++0x standard: [CODE=c++] Final obj(Temp{'a','b'});[/CODE] |
| | I have heard you can efficiently use your GPU to do fast floating point calculations. This can be done using OpenGL but you may have to use the library in an unorthodox way or graphics card toolkits such as CUDA (by nVidia) which I guess is Graphics card specific. Does … |
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