51,593 Topics
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| | I have a function, kinda like a main menu. But no matter what it always picks the first statement, even if it doesn't match the parameters of it's if statement, so it nevers get to the exit game function. So I can't use my close game function, and I would … |
| | how i can pass inside a vector an array? i know how to do it without classes but i don't know how to do it with constructor. i try to create a 2nd constructor that takes array of integers and the size of array and initialize a vector. header [CODE]#ifndef … |
| | I am converting a program written using Borland Turbo C to M$ Visual C++ 2010. I have created a Win32 application, and have now managed to write to a window. But the font that has come out is a proportional one, and I need a fixed font for everything to … |
| | Hello, I have a problem with my program that I can´t figure out. I would appreciate if someone could give me some hints on what to do. I am trying to write a program that checks how many random numbers less than a positive integer N one should generate before … |
| | I have an input file that i make into a string, it looks like this "1+2+3+45*5*2" My problem is when i print the string it always prints as single characters instead of 45 i get 4 5, how do i fix this. heres a small piece of the code. [CODE] …  |
| | Hie....M new to this site... i have to do a project on c++ using arrays, plz suggest me some topics if u can, so please can u help me asap...  |
| | I am having trouble figuring out how to convert base 10 to base 3, I have tried several different attempts and this is my latest effort, anyone have any ideas. I was giving this algorithm but am having trouble creating a function for it: [B] 1. Set k to the … |
| | Hi, I'm trying to create a 2D grid that would allow me to use fluid properties in each cell of the grid, which is defined by a struct. I have 3 grids: [CODE=c]Grid2D <fluidProperties> grid1; Grid2D <fluidProperties> grid2; Grid2D < fluidProperties> grid3;[/CODE] My struct fluidProperties contains 12 different properties: [ICODE]struct … |
| | I am trying to compile this example [url]http://www.boost.org/doc/libs/1_42_0/doc/html/boost_propertytree/tutorial.html[/url] and I am getting the error "/usr/local/boost_1_47_0/boost/property_tree/detail/ptree_implementation.hpp:795:54: error: request for member ‘put_value’ in ‘tr’, which is of non-class type ‘bool’" in this line: BOOST_FOREACH(const std::string &name, m_modules){ pt.put("debug.modules.module", name, true); } My full error message is: make all Building file: ../src/Boost_property_tree.cpp Invoking: … |
| | If I have a vector of structs [CODE] struct widgets { string widgetName; int age; int color; }; [/CODE] and widgetName had multiple words in lets say widget one type 45 blue widget two 34 yellow widget eight 46 green widget ten type 33 pink and I wanted to search … |
| | I'm testing to see if the sides make up a right triangle (a^2 + b^2 = c^2), but how do I make it so that, no matter the order put in, "c" will always be the largest of the three? |
| | I am running into an issue trying to use an iterator to print. I am trying to print the widget name and widget type from a class and am getting an error on the iterator part. The rest of the code works fine but any comments on that are more … |
| | Hello, I get this error when I try to run my code "Cross-thread operation not valid:Control 'dataGridView1'accesses from a thread other than the thread it was created on" File Name Form.cs I have method call FillDataGrid() [code] FillDataGrid(string msg) { string[] data = msg.split(';'); string Name = data[0]; string LastName …  |
| | I am having problems with understanding this code. The program should write all permutations of first N numbers. [CODE=c] #include <stdio.h> #include <iostream> using namespace std; void print(const int *v, const int size) { if (v != 0) { for (int i = 0; i < size; i++) { printf("%4d", … |
| | Hey guys, I am posting here for the first time, so please be gentle with me :P. I have an assignment of storing a text file in two arrays (one contains both char and int, whereas the other contains just numbers. The text file looks something like this: Time 2 … |
| | Hi, I am trying to read an input text file. And read the last letter only and check if it is an '+' or '*'. Here is the code I have written so far, if anyone can help me, I would be very greatful. [CODE] while(input>>lastChar) //put file contents into … |
| | [CODE]// initial_project.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include<iostream> using namespace std; void printmessage() { cout <<" ***WELCOME TO THE ALLOY INQUIRY PROGRAM!*** " <<endl; cout << endl; cout<< "Please Choose the Number of Your corresponding Choice\n \n (1) Aluminum Alloys \t \t (11) … |
| | I'm having trouble getting this program to work for roman numeral conversion. I hope it says that i have one error, which is C2110: cannot add two pointers. here's what i have so far... ANY help would be great, thanks a bunch! :) [CODE]#include <iostream> using namespace std; int main() … |
| | so im basically new at c++. i need to generate 20 entries randomly from 1-20, and each number must be unique. i was able to generate the number but i don't know how to make them unique. any suggestions?[CODE]#include <iostream> #include <stdlib.h> #include <time.h> #include <math.h> using namespace std; int … |
| | I want it to say "You are correct!" when the number they guess matches the random roll but it just keeps saying this when I type in 6 as my guess, how do I fix it? This is what I wrote in the main: [CODE] int num; int die; cout … |
| | Hi, I need to finish a assignment on operator overloading but this one piece of code doesnt seem to make sense.. in my int main() i have int main() { Element a, b(5), c(7), d; cout << (5+b) << endl; this is just part of it, I have already implemented … |
 | Hey all, I was taking a look at my stringstream conversion function and I couldn't decide how I want to handle a bad conversions. I used an exception and then in main I would a use a try, catch block to get any exception. [code=c++] #include <sstream> #include <exception> class …  |
| | This is the program that I have written, my problem is that the contents in the for loop does not execute. When I compile I get enter number of students to be registered And total cost of discount is R 0 QUESTION 2 PROGRAM #include <iostream>using namespace std; int main() … |
| | Hey, when I run the following code: [CODE]for(double i = 3; i >= 0; i -= 0.2) { cout << i << " "; }[/CODE] I get the output "3 2.8 2.6 2.4 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2". For some reason, it doesn't output … |
 | I've created a new class called BulletList2(linked list) using the built in dialog(File>New Class) which created a header file called bulletlist.h (in project folder>include) and a source file called bulletlist2.cpp(in project folder > src). header file [CODE=c++]#ifndef BULLETLIST2_H #define BULLETLIST2_H class BulletList2 { [...] } #endif // BULLETLIST2_H [/CODE] In … |
| | Can anybody tell me the diff between keywords and identifiers? Cin and cout in C++ are keywords or identifiers?  |
| | 0 down vote favorite share [fb] share [tw] share [in] i am working on a tiny tiny app that just uploads a file to the ftp server, i have reviewed my code but am quite unable to locate the problem, here is the code, [CODE=C]#include "stdafx.h" using namespace System; #include …  |
| | [CODE]#include<stdio.h> #include<conio.h> #include<string.h> #include<ctype.h> int main() { char org[50],r[50],m[50],a; int i,j,c=0,length=0,h=0,g=0,z; char token [3] [20] = { "void", "main", "int"}; printf("\nenter a line:"); gets(org); for(i=0;org[i]!='\0';i++) { length++; } for(h=0;h<3;h++) { for(g=0;g<length;g++) { z=strcmp(org[g],token [h]); if(z==0) printf("Keyword:%s\n\n",m); else printf("NO_Keyword:%s\n\n",m); } } printf("\n"); system("pause"); return 0; }[/CODE] it is showin this warning....[Warning] … |
| | Hello, basically I want to read an input .txt file, and check to see if '+' or '*' is at the beginning or end of the file. The file can have a space at the beginning, and that should be ok. This is the code that I think should work, … |
 | Okay, so I have tried to write a program that would generate the rule of 110. quoted from wikipedia: The Rule 110 cellular automaton (often simply Rule 110) is an elementary cellular automaton with the following rule table: current pattern 111 110 101 100 011 010 001 000 new state … |
| | Hi everyone, I was wondering if anyone could help me - at the minute I have a c++ program that renames a file and then attempts to move it too a new folder using linux commands and passing them to the 'system()' function. It renames the files no problem - … |
| | Ok, I've been trying to research this, but have had no real luck for my level of understanding. I've been programming C++ for a while and have decided to learn DB programming (just because I want to). Anyhoo, I am unable to figure this one out: I have a simple … |
| | Hi all, I'm having problems writing to a file, and can't figure out what's happening. Basically I have a program which tracks movement over several timeunits (each timeunit takes several timesteps). At each timeunit I write the results to a .txt file. However my program keeps crashing on the last … |
| | Im trying to make a game. Theres a player and he shoots bullets, and i was told whats wrong is it is making a shallow copy instead of a deep copy even though i researched this i cannot completely understand it. This is my attempt however i know it is … |
| | good evening guys. I have a problem with my -simple- application. I have 2 forms (Form1 - Form2), i create an object in Form1 (Person type) and i want to get the values of data members when i focused to the Form2 and i press getPerson button. But how can … |
 | I have a 2D array with generated doubles. I need to write this array to a CSV file so that I can open it in Excel. Is there a method or function in C++ that allows for this to be done? I could do it manually, but it would take … |
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| | Guys, I’m trying to integrate libssh2 libraries(windows version libssh2-1.2.5) with Dev-C++( v4.9.9.2). The OS is Windows XP SP3. I’m facing the following error when I compile the test file ssh2_exec.c (built in example) file. Compiler Output: --------------------- [Linker error] undefined reference to `libssh2_session_block_directions' [Linker error] undefined reference to `select@20' [Linker …  |
| | My professor in his grading robot decided to put a unicode character in a ciphering program and my code really doesnt like it at all. Can anyone help me without using loops? [CODE]// //Caesars Cipher //program encrypts a file using caesars cipher //Due 9/9/11 //created 9/9/11 //last modified 9/9/11 #include … |
| | I want to create a program in which the output currently on screen is stored in the file and when required, can be read and printed on the screen as it is. I want to use it to create a program in turbo c++. |
| | I get a warning about recursion when I compile the code below. I think the warning is wrong. Here is the background. I have two functions which "add a layer" to a DXF file. They have the same names but different parameters. One of them takes a CString and one … |
| | As far as normal ascii is concerned can I compare a wchar_t with a char type to see if they are equal? I think, but do not know, that the most common ASCII chars have the same integer value in char and wchar_t. Is that true? Do I need to … |
 | void FUNCTIONS WITH DIFFERENT TYPES AND NUMBERS OF PARAMETERS Ms Smart, a lecturer at a famous university, wants to compare the results of male and female students. She decides to calculate four averages, namely the average year mark for male students, the average year mark for female students, the average … |
| | The code runs but the problem is that the the discount value is not calculated wrong. Which part did I miss here. Here is the question: You now have to add a function discFee that has three value parameters - two of type int representing the number of sport and … |
| | I'm trying to get this to execute my main function but for the life of me, I can't seem to let is do that. there are no errors when running the code. What it is suppose to do is to prompt a user for gender between m for male and … |
| | I decided to give this a go again today. The pupils of the Annandale High School have to pay a fee for each extramural activity that they want to partake in. These activities include sport, and other activities such as chess, ballet, etc. The fee for sport activities is R120 … |
| | How do I nest a while loop inside a do..loop without using if statement? |
| | im making a C++ web browser, i have the basic design all i want now is it to be an anonymous browser, similar to a proxy site. is there a code you can give my to do this. im doing this for a friend who likes to play games in …  |
| | I'm working my way through Accelerated C++ and I've come across this exercise. The read_hw function works fine if it's void as long as I comment out the "return in" line. The author didn't bother to explain why he's returning a reference to the cin that was passed in the … |
| | Hello again. I have another conundrum on my hands. At the moment I am trying to program a simple flowchart of an ordering system of sorts. At one part, the program will ask the user for his/her name, then continue on. Later on, the user will place an order, and … |
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