49,765 Topics
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 | Hi guys! So I need help with a small problem. I'm using a char pointer array which contains a mathematical expression. For example: "sqrt 25" Now I want to use the inbuild c++ function `sqrt(int))`. I'm first searching in the array for the letters 'sqrt' so that my custom function …  |
| | I've had a sudden surge of interest in an old (2007) program which is an MFC Dialog based app. So I'd like to spruce it up a bit, and one of the annoying errors is that its proper icon does not appear in the bar at the bottom of Windows. … |
| | Hi I have a big (working) software written in C++ that uses SQL database, using the ADO interface. I'm currently using old ADO libraries (prior to the Windows7 SP1 problem) and wish to upgrade. I'm considering taking advantage of this need and upgrade to ADO.NET. What do you think?  |
 | Hey I want to make a Visual C++ program targeting x86 (and ARM) Windows CE .NET 4.20 using .NET Compact Framework. How do I do this? Thanks |
| | Hi, pls try to observe the size(i.e. total) of object for below program and in different cases as commented out. #include<iostream> using namespace std; class B { int x; // try by commenting either data member and observe the object size int *p; public: virtual void show(){} }; int main() … |
| | In the function for overloading the >> operator I am getting this error: 84`rationalize_number' undeclared (first use this function) this is the function: istream& operator >>(istream& in, Rational& rational1) { char tempChar; int numerator = rational1.numerator; int denominator = rational1.denominator; in >> tempChar; if(tempChar == '(') { in >> rational1.numerator … |
| | this loop is running more times then i want to and when the user puts in the wrong number how do i print out an error. #include <iostream> #include <iomanip> #include <cmath> using namespace std; int main() { string answer; int soda; do { cout << "Choose a drink or … |
| | At the moment I'm using getPixel() to scan the screen and get coord colours, but it's seriously slow. What's the best way to do it? Get a screen grab as a .png or .jpg and then process it. Would this be faster... |
 | I'm trying to port opensource C++ code into my own Pascal application. Specifically, I'm using libredwg source to read an AutoCAD drawing file so that I can extract text attributes and populate a database using Lazarus. char* copy_bytes_16(char *dst, char *src) { *(uint64_t*)dst = *(uint64_t*)(src + 8); *(uint64_t*)(dst + 8) … |
| | So I am taking C++ at thomas edison state college for a degree. I needed a computer course so I chose C++ instead of PLCs. The reason being is that I used to do some basic coding back in the apple IIe days. I apparently don't have the attention span … |
| | this game is called "pig latin" it spit all the string, put the first consonant to the end and adds "AY" to the end. for example --> "this is test" --->"histAY isAY estAY". it gives me string subscript out of range. thanks #include <iostream> #include "conio.h" #include <string> #include <sstream> … |
| | #include <iostream> #include <iomanip> #include <cmath> using namespace std; int main() { int soda; cout << "Choose a drink or 6 to quit:"; << endl; cout << "1. Coke $1.00"; << endl; cout << "2. Water Free"; << endl; cout << "3. Sprite $1.25"; << endl; cout << "4. Dr. … |
| | Whats c++ equivalent of this? while(scanf(*)!= eof){ //code }  |
| | I'm writing a program that unable me to extract timing(time that i used to finish typing my password). When running my program, i need to shutdown/close all the background processes to prevent any delay whn i extract the time. Any coding(C++ or C#) can help me to shutdown/close all the …  |
| | Hi, I am trying to put random numbers in array, and use the array for other functions. However, I am stuck on inputting and displaying that array with random numbers. Can someone help? Please ignore other cases, and focus on case 0, which is displaying the elements of the array. … |
| | Hi I am new to C++ and I just need some advice on declaring dynamic arrays. Take for example this code block: int a=0; cout << "Enter Arr size: "; cin >> a; int arr[a]; My compiler gives no error doing this but looking around the web I see many … |
| | I'm causing input letters to write ones into variables through an array. I'm trying to count the occurences of ones in a variable. Lets say I input aaaaa. The count output displays 12345. Instead of outputting the whole count of numbers, I want to output the biggest number in the … |
| | This is a factorial program which uses array to calculate large factorials. The problem is sometimes if I enter 1000, it gives the output but stops working there after. I tried it with 2000, 3000, it works fine. I cant understand its erratic behaviour? Is there any problem with my … |
| | #include <iostream> using namespace std; class Lists{ public: void insert_head(int insert); void remove_head(); void insert_tail(int insert); void print(); Lists(); private: Node *head; Node *tail; }; struct Node{ int data; Node *link; }; int main() { Lists temp; temp.print(); return 0; system("PAUSE"); } Lists::Lists(){ head = new Node; head->Link=tail; tail->Link=NULL; } …  |
| | Hi guys, I am trying to write a program that will ask for users name, birthdate and pet and from those info I need to use a random number generator to select 6 char from the name and animal and 2 numbers from the birthdate. This is my code to … |
| | I have a code which gives the maximum value I can get by filling the knapsack with the optimal set of weights. int arr[5] = {0, 0, 0, 0, 0}; int Weight[5] = {2, 5, 8, 7, 9}; int Value[5] = {4, 5, 7, 9, 8}; const int n = …  |
| | Hello How do I write a C++ program targeting a x86 version of Windows CE in Visual Studio 2008? It doesnt show me Windows CE and more so, all it targets is ARM. Thanks |
| | hi all i would like to ask...ermm i have an erorr it say that my winscard.h no such file or directory...when i search it in my include folders there is no winscard.h in that folders..so...what should i do..is it somekind relate to the pcsclite.h ??? do i need to install … |
| | A corporation has six divisions, each responsible for sales to different geographic locations. Design a DivSales class that keeps sales data for a division, with the following members: • An array with four elements for holding four quarters of sales figures for the division • A private static variable for … |
| | I am building an application that calculates travel time necessary to reach a user selected destination from predetermined city based upon an estimated travel speed determined by the user. For this program I am to utilize classes/class source files. When compiling my source file I continuously get the error “undefined … |
| | How to make a program that prints out 10 stars with using cout or for loops or while loops. |
| | So basically I am new to API programming and teaching myself. I've done a bit of console C++ that I got off of.... an internet tutorial. The story is the same here too. I am somewhat aware of what the lines of code do, though I am not yet a …  |
| | Hi, The below TimeZone code returns the following string: "(GMT-05:00) Eastern Time (US & Canada)" TimeZoneInfo FromZoneID = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time"); What I wonder how it is possible to do is how I create the TimzeZoneInfo object by using the string directly. I have tried this but it doesn´t work. … |
| | Hi every I'm new here and new to programming. : ) Here is a practice assignment I have completed but seemingly not correctly. Can anyone offer advice as to my error? It compiles correctly but using some test numbers I only ever recieve that the circle has no x intercepts … |
| | hi everyone i have a problem with this code below. when i try to read all the files in a directory i can but when i try to put them in a vector, it doesn't work, all the elements in the vector become the last element added. I'm not sure …  |
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