51,593 Topics
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| | I have a external chr file which borland graphics (BGI) use in the C++ compiler. The question is how do I use the font..? Do i need to register it with the BGI graphics driver or something, if yes, how?? I am using TC 3.0 |
| | When writing this: [CODE] #include <iostream> #include <iomanip> using namespace std; int main() { float number = 2.12345; cout <<fixed <<setprecision(3) <<number; return 0; } [/CODE] I get 2.123 If I then cout another float variable that I want all decimal numbers at, and not setprecision(3)...... How do I do … |
| | Hey there , I have a problem about saving information, which is read from a text file, to an char array.I have to read the file character by character.I could't use getline() function and string, I have to use get() function.There is a sample of the all data : " …  |
| | Based on my header file. How would I write a complete definition of the function temp (). [CODE]const int MaxDays = 31; // Maximum number of days in a month const int MaxTimes = 5; // Maximum number of times temperature is measured in // a day plus one column … |
| | Here is the question : [URL="http://www.sendspace.com/file/qu6bpi"]http://www.sendspace.com/file/qu6bpi[/URL] I upload the code to my school checking system, and it said that I can only pass 6 hidden cases out of 10. I don't know where the problem is. :'( [COLOR="Red"]Here is my code :[/COLOR] (can only use looping,if,array,pointer) [CODE]#include<stdio.h> #include<math.h> #define N … |
| | Note: vector < vector < string > > addresses; I am having a problem with this line of code: addresses.push_back(addy.c_str); I am trying to push back an email address in the i location of the 2-d vector. I have tried: addresses.push_back[(addy.c_str)]; and addresses.push_back[i][(addy.c_str)]; but nothing is working >:/ I appreciate … |
| | Is changing the currentLoc variable with an [B]IF[/B] statement a bad way to terminate this loop below? I'm told: [I]"...something in the loop body must cause the expression to become false at some time. One of the things you do not do ever, is write an if statement to change … |
| | Hi all, I've setup a class within my software package to read generic text files. For this, I'm using the getline( ) function and then parsing each line for specific types of files. In setting this up, I've come across the ACSII incompatibilities between Windows systems and Unix systems. I …  |
 | I'm working on a simple recursion function that takes a number and then adds the digits together, say 12345 = 1+2+3.....=15 I have that part: [CODE] int DigitSum(int number, int sum){ //if the remainder of the number / 10 is 0, return the sum if(number % 10 <= 0){ return …  |
| | I've been trying all day to write an array into a file but it doesnt work. The code I'm using is: [CODE] fstream myfile; myfile.open ("array.txt"); for(int i=0;i<=9;i++) { for (j=0; j<9; j++) myfile<<array[i][j]<<endl; } myfile.close();[/CODE] What am I doing wrong? This works if I knew what I was writing … |
| | Whenever I try to compile my Song class I get a ton of linker error messages. I'm using the Dev-C++ compiler. Here's my code: //The header file [CODE]#include <iostream> #include <iomanip> #include <fstream> #include <string> using namespace std; class Song { public: Song(); Song(string title, string artist, string album); void …  |
| | ETA: okay take two, I thought I had the problem fixed, turn out no. Okay so I'm a student on work term teaching myself C++ coming from a background in Java, having done that for the past two years in school. I'm having a tough time with some concepts and … |
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| | I need to create an integer array with 10 elements, write a function that will have the user enter the data. The function will return nothing and has 2 parameters, the array and the size of the array. |
| | Hi everyone, I have a 2d array whith 50000 lines and 14 columns, and I have to sum/multiply each value of a column for a fixes numbers, like this: a[1][14] = 0 a[1][14] + 2 = 2 a[2][14] = 2 a[2][14] + 2 = 4 a[3][14] = 5 a[3][14] + … |
| | Trying to understand two dimensional vector and was wondering if anyone could help me out on a sorting code for this so that it numbers 0-9 people, gets x number with each of them and then outputs the person (number) ate x pancakes - But in descending or ascending order. … |
| | who know code to link form when double click node in treeview? |
| | I have a batch file that sets JAVA_HOME, PATH and CLASSPATH and calls a jar file. The last line in the batch file is "java -classpath test.jar test %1". When I run the batch file from the command line, using a paramater, the parameter displays in the console as expected. … |
| | I design a treeview for link to each form in MDIparent form. I'm also design a form for permission. when administrator check checkbox, then user can login to this form else the node of treeview will enable=false. then user cannot go to this page. 1. I wan know how to …  |
| | Hi, I have a list of base types which stores multiple derived types. The following code shows a simplified setup. [CODE]#include "Base.h" #include "DerivedA.h" #include "DerivedB.h" #include <iostream> #include <list> void main() { std::list<Base*> base; std::list<Base*> *basePointer = &base; for (int i = 0; i < 10; i++) { basePointer->push_back(new … |
| | Hello, for a project on network simulation I need to show graphical representation of the graph.Which library files can I use for the purpose?Should i switch to OpenGL.I know nothing about graphics in C++ right now.Please help. Regards. |
| | Im trying to install the opencv libraries and i tried following the instructions at: [URL="http://blog.cuvilib.com/2011/03/22/how-to-build-opencv-2-2-with-gpu-cuda-on-windows-7/"]http://blog.cuvilib.com/2011/03/22/how-to-build-opencv-2-2-with-gpu-cuda-on-windows-7/[/URL] but Im having problems getting the sample code to compile. When I try: [CODE]#include <iostream> #include <opencv2/opencv.hpp> #include <opencv2/gpu/gpu.hpp> using namespace std; int main() { try { cout<<cv::gpu::getDeviceName(0); } catch(const cv::Exception& ex) { std::cout << …  |
| | [CODE]#include <ctime> #include <cstdlib> bool winner = false; winner = true; srand((unsigned)time(NULL)); comp_choice = rand() % 3; system ("PAUSE"); return 0; } [/CODE] How to transform this idea or this codes to simple codes in IOSTREAM Library |
| | Hi, I was wandering if someone could tell me how i would go about this, or at least point me in a direction? For a program that I need to develop, it need to perform a set of operations on a specific set of task. However each task is similar …  |
| | I have a main function and I want to call another function inside my main, but it gives me an error like this: error C2601: 'ComputeCentroid' : local function definitions are illegal I know that this is an error because the '{' for my main is still not closed before …  |
| | First of all, I'm 17 learning C++ on my own! I've been enjoying Daniweb. and I did like to thank the community for that! Thank you all! Here goes my Problem... I have a small program that calculates time between two instances and it worked fine... so I decided to … |
| | ok, so i want a program that just says back to the user their input. the users input will be more then one word, so there will be whitespace. when i use string as a class for the input, then it only gives back the FIRST word of the input.... … |
| | Ok, so my program complies (not that that means much, haha), but at least I can now SEE that something in my loops isn't right. I need to take my 2-dim array file input of 4 students with 3 quizzes, which looks like this: (the asterisks are whitespace) 10**10**10 *2***0***1 … |
 | Hey Everybody, I keep getting these warnings when I compile my program: 19: warning: extra tokens at end of #ifndef directive 19: warning: missing whitespace after the macro name both apply to the same line number, which has nothing to do with the ifndef statement. I tried looking for an … |
| | Trying EVERYTHING but I don't know what the *heck* I'm even supposed to try because there shouldn' tbe a *bleeping* PROBLEM. The file is being opened fine, I guess, because I tried changing the file path and then got an error. It's just not reading the DATA. THERE'S NO REASON … |
| | Hello all, I am currently in the process of learning C++ for a work term position I am on. After hitting a wall trying to teach myself from books I decided it might be easier to translate some old Java programs from school into C++ to get a better understanding … |
 | Hello everyone, i'm having some problem with the following code: [URL="http://pastebin.com/KTKaVje8"]CODE[/URL] inputSouce is an abstract class and the rest are derived from it. The definitions for these are elsewhere. Now, [CODE]inputSource *irSources[4]; irSources[0] = new irSource(); [/CODE] This is giving me errors. i'm using VS2008. [B]error C2466: cannot allocate an … |
| | [CODE]// Finals.cpp.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <iostream> #include <string> #include <iomanip> using namespace std; // //CLASS DECLARATION SECTION // class EmployeeClass { public: void ImplementCalculations(string EmployeeName, int hours, double wage); void DisplayEmployInformation(void); void Addsomethingup(void); string EmployeeName; int hours , overtime_hours, iTotal_hours, …  |
| | Sorry if the title is a bit off, I couldn't think of what to call it. I've created projects in VS, and they all run perfectly fine. However, I now just want to create the source files then compile via the command line. I've done this rather easily, but now … |
| | Hi there, I've got a question to ask regarding Hamiltonian problem. I'm doing on a simple question below: State equations ODE:- [TEX]dy/dx (t) = x2(t)[/TEX] [TEX]d^2y/dx^2 (t) = -x2(t) + u(t)[/TEX] ....where u is a control. Initial condition [TEX]x1(0)=0[/TEX] and [TEX]x2(0)=0[/TEX]. We try to minimize [TEX]J(u) = \int\limits_0^{10} [y1^2(t) + … |
| | Is it difficult to turn games like [URL="http://www.clarendongames.com/product.php?xProd=3&xSec=2"]Perigon[/URL] that have been written in C++ for iPhone into games for PC? |
| | Well I don't have any specific question. I've been writing a chess game and can't seem to figuire out what the problem is with it! I tried debugging it for a few hours now and am about to give up altogether and rewrite it. The problem occurs seemingly randomly when … |
| | i have two projects on visual studio 2005 one in vc++ & other in vb.net now i want to both programs to work cooperatively acc to me i have following ideas but dont know how to implement them 1 - if i create third project and integrate/merge/combine other two in … |
| | I am trying to dump the memory of my c++ app. [code=c++] #include <iostream> #include <fstream> using namespace std; int main () { ofstream myfile; myfile.open ("example.txt"); myfile << "Writing this to a file.\r\n"; myfile.close(); int *p; *p = 25; char b[] = "hello"; int a; for (a=0; a==-1; *(p++)){ … |
| | I have 5 programs that works 100% I need to integrate them in one code using this code in the main [CODE] int A; cout<<" Enter Your Choice"; cout<<"1. Algorithm A ."; cout<<"2. Algorithm B ."; cout<<"3. Algorithm C"; cout<<"4. Algorithm D"; cout<<"5. Algorithm E"; cin>> A; if(A==1) { //call … |
| | Hey everyone , I have a Mid semester Exam next week and I need to study the basics of programming a C++ programs. can anyone recommend or help me with some basics or link me something which could help me revise things faster and make it easier. i am sturggling …  |
| | this program does not read display smallest and largest values in order [ICODE]#include<iostream> using namespace std; int main() { int sum; int product; double average; int x,y,z; int largest; int smallest; cout<<" Enter Three Integers of your Choice "<<endl; cout<<" *********************************** "<<endl; cin>> x >> y >> z; cout<<endl; smallest … |
| | Hi, I'm programming something for a micro-controller and I need a compiler that can turn c++ into .bin Anybody have any idea where to get one? |
| | Firstly, apologies for the lack of commenting, it will be commented when the program works properly (lol), I'm creating a program which creates a test harness for 3 subjects, employees. This will display their name, ID and payrate per hour, it will then calculates the total amount in 37.5hours. Again, … |
| | I was working on this program a year ago and wanted to check something on it but I have some errors on it and was wanting to know if someone very knowledgeable and take a look at this and offer me and advice to make it run. I get some … |
| | Please help how do i do this program?? i have only two more days before it is due :( Write a program to read data from a large text file. Within the file, the data are arranged in two columns, separated by white space characters, and comprised of a variable … |
| | Made a small project to help compare two files that I am testing...but for some reason the line I highlighted isn't working as its supposed to. I originally had [CODE]c1 != c2[/CODE] and then changed it to [CODE]!strcmp(c1, c2)[/CODE] Maybe its a dumb logic bug, but would appreciate some help … |
| | Hello All: I searched through the old posts, but could not find an answer as how to read numbers from a sequential text file & calculate the average of the numbers. Do you place the calculation to find the averages outside of the loop to read the text file? If … |
| | Hi guys, I am new on this forum and I would like you to help me out regarding to the actual errors that I have got. I am using managed c++ as I have switched over from vb.net, however I need your help because I couldn't figure out the solutions … |
| | Hi ~ I am getting a strange [B]RunTime Error[/B] while debugging my code. Run-Time Check Failure #2 - Stack around the variable 'player' was corrupted. Code is below. Would love some help on this one. Thanks. ps ~ I realize that system("pause") is frowned upon but it is what we … |
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