49,765 Topics
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| | I have a string and i want to conver the part of it to an int. I want to convert the part of the string `input[1]` to an int. But my compiler cant use atoi, or stoi.. I saw a ifstringstream option i think can work, but i tried implementing …  |
| | I want to optimize a directory listing input iterator so that the WIN32_FIND_DATA can be written directly to a vector (via emplace) instead of being first written inside the iterator. This is an idea of the code: /* std::vector<WIN32_FIND_DATA> vwfd; struct listing_it:std::iterator<std::input_iterator_tag, WIN32_FIND_DATA>{ HANDLE handle; WIN32_FIND_DATA wfd; auto operator*()->wfd&{return *wfd;} …  |
| | I am using Qt5.2.1 and I made a program to do some stuff. In it I added a radio button (named 'others') i want that when the user clicks this button a line edit pops up besides it and lets the user enter some stuff inside it. when the user … |
| | #include<stdio.h> #include<conio.h> #include<dos.h> void print(char c,int x,int y); void main() { char a[3]={'A','L','I'}; int i=0,x=1,y=1; while(i<3) { print(a[i],y,x); i++; } } void print(char c,int x,int y) { int s=1,a; if(c=='A') { while(!kbhit()) { clrscr(); gotoxy(x,y); printf("*****"); gotoxy(x,y+1); printf("* *"); gotoxy(x,y+2); printf("* *"); gotoxy(x,y+3); printf("* *"); gotoxy(x,y+4); printf("*****"); gotoxy(x,y+5); printf("* *"); … |
 | Hi again guys this time I have a question about computer security that's related to my programming hobby. I hope this isn't against the rules. I am asking this out of curiosity and concern, not because I want to do evil. However thanks to some knowledge I gained from a … |
 | Hello, I have a `HWND` for a window. I have double checked that it is a 100% valid window by using `SetActiveWindow()`, `SetFocus()`, and `SetForegroundWindow()` on it, successfully bringing it to the frontmost window. However whenever I try to use `GetPixel` on it it returns -1 (0xFFFFFFFF). What am I … |
| | Hi i am new with C++, i just need a little bit help with this. please reply code compatible with orwell dev C++ I want an application that uses windows RegisterPowerSettingnotification function for the events of GUID_ACDC_PowerSource.... i tried like below but my dev C++ compiler was not able to …  |
| | I have used Qt to create GUI program in C++, but i have given up in trying to statically compile Qt. i have moved on to microsoft visual studio 2013, the question i wanna ask is does the same problem occur in visual studio ( creating static programs ). if … |
 | I rote this code in my program JSONNode::const_iterator iter = root.begin(); for (; iter!=root.end(); ++iter) { const JSONNode& arrayNode = *iter; std::string type = arrayNode["type"].as_string(); if(type == "node") { std::string id = arrayNode["id"].as_string(); double lat = arrayNode["lat"].as_float(); double lon = arrayNode["lon"].as_float(); Node node; node.SetId(id); node.SetLatitude(lat); node.SetLongitude(lon); nodesMap.insert( std::pair<std::string, Node>(id, node) …  |
| | I want to create a queue that holds certain information. I want it to hold multiple peices of information like below. Name, Age, Race, Sex. How can i create a queue FIFO. that holds multiple pieces of information like this that i can access or add into? Thanks! |
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| | How do I change this code so that the user can choose a math operation and determine have that type of operation(either add sub mult or divide) run as much as a user wants it to? Say, if the user wanted 5 addition questions only. And how do I keep … |
| | I created following classes in my program. Way.h class Way { private: std::string id; std::string name; public: Way(); Way(const Way& orig); void SetName(std::string name) { this->name = name; } std::string const & GetName() const { return name; } void SetId(std::string id) { this->id = id; } std::string const & GetId() …  |
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| | Hi all.. I have a image taken by vision machine camera.. Object is arrange by different layers.. I able to get accurate object position for those drop in calibration layer.. For layers that before and after calibration layer,position is not accurate.. Working distance is fix.. Can u all provide me … |
| | I need some assistance with a program I wrote and had to alter. Here are the initial instructions and what I initially had then my reworking and what I have now and any assistance would be helpful. Write a C++ program to help you balance your checkbook at the end … |
 | so i got a class going for making and showing tree elements, i need some help with the following: i need to display the leaves and the height of the tree. here is the code: // ar.cpp #include <iostream> #include <stdlib.h> using namespace std; class nod { public: char inf; … |
| | I'm trying to convert a number from any base between 2-36 to any base between 2-36. I have the conversion to base 10, but I'm having trouble getting it from base 10 to the desired base. Any ideas? I know part of this idea will work, I just can't get … |
| | I am trying to print my queue which has values in it. Right now i have this. for(int i = 1; i<ReadyQueue.size(); i++) { } But i am stuck now because i have no idea how to print a queue without popping it off the front. So now i am … |
| | I have a class below class CPU { public: void setPID (int a) { PID = a; } int retrievePID() { return PID; } private: int PID; }; And i am curious if you can create a queue into this class? I am trying to queue in a value into … |
| | Here is question: Write a program that reads a string from the user containing a date in the form mm/dd/yyyy. It should print the date in the form March 12, 2012. #include<iostream> using namespace std; int main() { int mon; int day; int year; string month[] = { "January", "February", … |
 | Write a program to get 3 numbers from user for integer variable a, b,and c. if a is not zero, find out whether it is the common divisor of b and c. |
| | How can i write it so that my program only accepts positive integers that are great than or = 0? I want my program to ask "How many devices do you wish to add?" And if a user enters a letter, or anything negative it will ask them to enter … |
| | I keep getting loads of linker errors that probably have something to do with virtual-functions/definitions and/or static class members... I've seen several relevant posts but none of the solutions suggested work, can you see wht the problem is here? My projects consists of 3 files: BALLS.H #include <iostream> using namespace … |
| | I am getting an error on this code. Is it to do with whats in the while loop? How do i get it working? Basically i want to be able to take in letter or number variables, and each would output something, and if they type exit it breaks out … |
| | How can i create a input that only allows the letters a b c d The console will ask to please enter a letter. And they can only enter the letters a b c d. And if they enter it, it says thank you for enter a, or b or … |
 | Ok this program is almost done. Some correction are still needed. Can anyone here put this in character array. #include<iostream.h> #include<conio.h> #include<stdio.h> char value; char t, u, v; char answer; void Binary2Decimal() { gotoxy(1,9);printf("[BINARY TO DECIMAL CONVERSION]"); char b2,f2=1,d2=0; gotoxy(1,11);printf("Enter a Binary number: "); scanf("%d", &b2); printf("\n\n"); while(b2>0) { if((b2%10)==1) … |
 | cd just stays at this state: sgraham@myshell:/home/class/sgraham>cd .. sgraham@myshell:/home/class/sgraham>cd .. typedef struct { int argument; // userCom arguments char *arg[MAX_ARGS + 1]; // userCom arguments array char *Listcomm[MAX_COMMAND_SIZE]; char *input; // hold input file char *output; // hold output file } Command; int main() { Command userCom; //holds userCom struct …  |
| | The only time I know of is when we call the assignment operator. Is there any other moments I should do it? Like any other operator where memory management would be useful? |
| | public: Queue() : front(0), back(0) {} void put(TreeNode *ptn) { ListNode *tmp = new ListNode(ptn, 0); if (back == 0) front = tmp; else back->next = tmp; back = tmp; } TreeNode *get() { assert(front); TreeNode *result = front->ptn; ListNode *tmp = front->next; delete front; front = tmp; if (front … |
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