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Member Avatar for pattmorter

So I was doing some code for input validation on my homework program and i have the correct code to make sure a number entered it correct but I thought, what if they enter a letter. We aren't required to make sure that the user entered a number but how …

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Member Avatar for a.muqeet khan

hello guys ! i have created a program just to understand how to return a value from using a recursive program what it does it thati have have two variable i.e first and last the value of first is zero and last is 10 not i want the function to …

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Ok, I've been trying to wrap my head around this code for the longest time today, and I've tried to look up multiple web pages on how to solve my issue in a different way, but it's no use. There's something that Im not seeing that separates a regular array, …

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Hello i am finishing up a pop3 program and now am looking for a way to view the html i receive form the pop3 server that comes along with some messages. People have told me to use a web browser but that seem over kill. Could i dissect a web …

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Hi, need help with an assignment. Here is the problem and the code the I came up with. It displays the start and the end but it does not display the numbers in between. Thanks in advance. ;) [CODE]//create a C++ program that will accept 2 numbers: (Start Number and …

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I have a question on a very basic operation of modulo operator. [B]Why does 1 % 9 produce 1?[/B] If 10 % 9 then remainder is 1. I am very poor in math but have had to use modulo operator many times before but always become confused and couldn't understand …

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So, I'm a bit confused with how inheritance works in relation to variables. Let's say that I had the following class: class Test { private: int var1; float var2; public: void getInfo(int,float); void setStuff(int,float); }; Now, let's suppose that I wanted to derive a class from that base class; I …

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Hi I am working on Linux and I am trying to create a GUI app to go with my executable I have made. For some reason it unexpectedly ends. There is no error message, it just says in the Qt console window it unexpectedly ended with exit code 0. Can …

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Hello! I am trying to implement search algorithms in a 2D grid. The problem I am facing is that let's say that I make a 2D grid in c++ through some array and also block some cells. Now how will I convert this grid into a binary tree to run …

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Member Avatar for a.muqeet khan

hello guys ! i have created a program just to understand how to return a value from using a recursive program what it does it thati have have two variable i.e first and last the value of first is zero and last is 10 not i want the function to …

Member Avatar for a.muqeet khan
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Member Avatar for Tygawr

Hello everyone, I've attempted to use ifstream to open and read a 20GB file but failed to do so (it takes a very very very long period of time...). So, I need find a fast way to open and read a 20GB .txt file in C++. Thank you!

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Member Avatar for lanario

I'm lost based on the code provided, how to reduce a fraction down. I've looked on the internet and yes most are using global variables; I however, can not for my class. It must be within the function. And there needs to be two calls outside of each of the …

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Hello everyone, I am having a hard time reading and writing a UTF-8 file in visual c++ 2010. [CODE] void ReadUTF8File() { ifstream UTF8File("C:\\DaniWeb\\Desktop\\UTF8File.txt"); /* UTF8File.txt: ☺☻♥♦♣♠•◘○ */ string UTF8FileStr; if(UTF8File.is_open()) { while(!UTF8File.eof()) { UTF8File >> UTF8FileStr; cout << UTF8FileStr << endl; /* cout: ∩╗┐Γÿ║Γÿ╗ΓÖÑΓÖªΓÖúΓÖáΓÇóΓùÿΓùï */ } } UTF8File.close(); } …

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Member Avatar for FraidaL

I'm receiving this error when I'm trying to run my program: Program received signal: “EXC_BAD_ACCESS”. Does anyone know what this means?

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Member Avatar for Jorox03

I'm doing an assignment for school which is to simulate the grep command in C++. We are to take in a word to search, an input file to search through, and output file to output the results. The only text that should be in the output file is the contents …

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when using setprecision(2) when i try to display the number .90 it olny outputs .9 is there anyway to make it so that it display .90 instead of .9.

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I'm writing this program to calculate the best fit line. It's not finished. I'm doing it step to step to make sure it runs so I don't get lots of errors and totally freak out at the end. Right now it runs fine, but something is really off with the …

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I'm trying to help someone with homework.. So you do not have to give me direct answers if you don't want to.. it is not my homework. [CODE] class Types { //No default constructor.. Types(int Param1, int Param2); }; class Objects { public: Types* Original; Objects(); ~Objects(); }; //The problem …

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I am trying to compare a string from my text file to a user input i was wondering how I would do this I have tried the == operator but that seems to be getting me no where. I am currently trying to use the .compare() but it doesn't seem …

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OOPS! SORRY WRONG SECTION, I WANTED TO POST IN THE C++ SNIPPETS.. This piece of code will search for a string in a text file and write the results into another file along with the line number. [CODE] void IOSearchString() { string SearchString, InputFilePath, OutputFilePath, InputFileLine; cout << "Welcome!" << …

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Hello, I have a linked list with the following data in it reflecting a title (name), int (# copies) and float (price). I'm supposed to sort this linked list by prices (highest to low) and then print the titles. From what I've seen, the best method is using selection sort, …

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I have a pointer to an array of integers... [CODE] double* three = new double[10]; for(int i = 0; i< 12;i++) { three[i] = i+1; } [/CODE] I assign i+1 to each place in 'three'...when I debug the code, I cannot see the values inside 'three' like in C#..it just …

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I need help changing my return type from int to vector<string>.. I don't want to have to pass the vector as a pointer to the function but rather I just want to return the vector itself as I no longer need to check the return type. If it fails, it'd …

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Hi Guys, I'm really struggling getting to grips with C++ I need to read a .txt file which contains something similar to this: [CODE]Eng.Speed Torque 1000.0, 34.55 3800.0, 46.58 6600.0, 47.44 9400.0, 48.75 12200.0, 39.79 15000.0, 24.61[/CODE] I'm trying to: .Open a file named torque1.txt .extract the data .I want …

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Member Avatar for Sibuns

Hey! I have some trouble with drawing on picturebox in visual studio c#. I want do draw a line between 2 points that i get either with mouse clicks or with inserting coordinates manualy. So i have created 2 events, picterbox paint event where i made a pen and graphics, …

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#include <iostream> #include <fstream> #include <string> #include <windows.h> using namespace std; int main() { system("restart -f -s -c \"messege please write here!\" -t 30"); return 0; }

Member Avatar for Ancient Dragon
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Member Avatar for gunnerone

Hi I am trying to validate a URL in-putted by the user to check whether it is syntactically correct. [CODE] #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <regex.h> printf("Enter the website URL:\n"); fgets(str, 100, stdin); if (!strcmp(str, "\n")) { printf("Empty URL "); exit(2); } regex_t regex; …

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Have a situation with my code, where it appears the stringstream object is not being cleared. Here is my code, this code will set an interprocess shared variable, The code is simplified to illustrate my problem, and all other variables are there to aid in that, for instance, the ints …

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i want to do some projects in c++ ,which topic is easy to do project please give some suggestion

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I have been working on this all day can someone please tell me what I am doing wrong. using System; public class ArrayManagement { public static void Main(string[] args) { int[] myArray; myArray = new int[7]; myArray = fillArray(); int sum, avg; arrayMath(myArray, out sum, out avg); displayArray(myArray); } public …

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Member Avatar for scottd82

I don't know where to begin, so I'll start with what I know. First, I have a remote control. Second, a chip. The remote control has two directions, left and right. The chip receives the signal and then moves in the direction accordingly. Now, what I want to do is …

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Member Avatar for ilearnz001

Looking To learn how to send data from a program to a webservers webpage. More specificly sending the data to <form> tag within a html file. Trying To Find out how to do this, code examples would be prime. Also Any Guides on connecting proxies -- who then connect to …

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Member Avatar for johanjvanr

Hi all I have to write code that ask the user to input a current (that will be split into two currents) and then the output from the code should display the two resulting currents given two input resistors. That part I can do but my problem is I have …

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Member Avatar for triumphost

K so atm, I'm having problems understanding ENDIF and IFDEF preprocessor stuff.. I want to Use a specific method if a file is included.. If not, use a different method.. Since toupper is defined in CCType I tried to check if that file was included.. if it was, use toupper …

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I have a question, I have a working application. I am using a splitcontainer with multiple different Panels inside of it. When a user clicks a button the following code is executed: [CODE] this->panelnameA->Visible = true; this->panelnameB->Visible = false; this->panelnameC->Visible = false; [/CODE] Now my question is lets say an …

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I wrote this code for a homework problem. The question asks for the inputs to be an array representing a polynomial along with the degree of the polynomial and the value of x. Then it has to return the derivative of the polynomial. Until I ask the program to output …

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this program works but i need to put in a loop that the user 10 times to input a value and you load it ino an array #include<iostream.h> #include<conio.h> //Author: //Object: //Date: void ctof(void); //function declarations (prototypes) void ftoc(void); float c,f; // (outside the functions) main() { int option; //--------------output …

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Member Avatar for mynameisfish.22

Hi guys just wondering if anyone could give me some tips on starting a moveable char function for my maze game. I wish to create a function that allows me to move the player through the maze shown below. I have a few ideas on how to do this however …

Member Avatar for mynameisfish.22
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Member Avatar for Shaye12321

Hey there! I'm trying to figure out how to get a random letter generator for a program I'm working on in my computer science class (it's in C++). I need to generate 5 random capital letters between A and P (A, B, C, D, E, F, G, H, I, J, …

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What did I do wrong? Can anyone please explain to me so I can learn? [CODE] #include <iostream> #include <string> #include <cmath> #include <math.h> #include <algorithm> using namespace std; class Distance { private: int length; public: Distance(int length = 0); int operator *(Distance My_Trip); int trip_length; }; int Distance::operator *(Distance …

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to anyone I am currently writing this C# program for a C# class I am taking and I have the correct formula which is Future Value=PresentValue*(1=Rate)Year the issue I am having is there is an error message for the futureValue= presentValue, the presentValue has the message Use of unassigned local …

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Hello everyone, Ok my problem is that I do not get how to convert an array of characters to a string arrays. Like I do not get how to assign a null character at the end of a set of characters... how do I incorporate punctuation, spaces etc in this …

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Member Avatar for SoapyCro

Hey all! I was thinking about how to make a program, in which you write some c++ code and program tests that code with given examples. For example you input following code in that program: [CODE]#include <iostream> using namespace std; int main() { int a, b; cin >> a >> …

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Member Avatar for Richard0

Here is the code of my binary tree can any one plzzz write the delet function for it..... i tried my best but..... [CODE]#include<iostream> #include<stdio.h> #include<conio.h> #include<Windows.h> #include<stdlib.h> using namespace std; struct st { int marks; st *left; st *right; }; struct st * create() { struct st *p=new st; …

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I am having trouble with writing a tic tac toe program. My code executes just fine if the first move results in a win. If it doesn't the code just stops. It doesn't finish but it does not continue to run. Can someone help? Must start with the game board …

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[CODE] vector<string> guess(4); cout << "Input a Guess(e.g red blue green yellow): "; cin >> guess[0] >> guess[1] >> guess[2] >> guess[3];[/CODE] this is part of my code to let the user input 4 different guesses, is there anyway I can limit the input by 4 so that if the …

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Member Avatar for Jack_Steel

Hey forum, I'm very new to C++, and I need some help. I'm currently having trouble trying to write a Caesar cipher in C++. So far, I'm able to get it to read characters from a text file, and let it count the # each letter appears in an array. …

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Dear friends, These days ,I am learning something related to linear list.In implmenting the function of realloc.I have been pullzed for several days,although I can use "include" method to directly use the function. However , I deeply wonder that how can I write my own code to solve such questions in …

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The End.