[ad_1] if (a == NULL) can’t work since you are comparing a std::string with an Integer which is not possible. if you want to create an empty string and test for emptiness just do: string a; if (a.empty()) { /* do something */ } 2 [ad_2] solved checking `aStr == null` in C++
[ad_1] If your platform has conio.h available and your compiler supports C++11 (including <chrono>) you can do it like this: #include <iostream> #include <chrono> #include <conio.h> int main(int argc, char* argv[]){ std::chrono::time_point<std::chrono::system_clock> start; start = std::chrono::system_clock::now(); /* start timer */ while(true){ __int64 secondsElapsed = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now()-start).count(); if(secondsElapsed >= 20){ /* 20 seconds elapsed -> leave main … Read more
[ad_1] Here is a simple example for you: #include <vector> #include <algorithm> using namespace std; //This is the comparation function needed for sort() bool compareFunction (int i,int j) { return (i<j); } int main() { //let’s say you have this matrix int matrix[10][10]; //filling it with random numbers. for (int i = 0; i < … Read more
[ad_1] As Patrick Eckebrecht noted in his comment to this question, it was enough to click “View Detail” to find the reason for the exception: [ad_2] solved ‘System.AggregateException’ occurred in mscorlib.dll” when using SignalR
[ad_1] It seems you just want to shuffle the characters and generate a new string.You can use the method that uses Fisher-Yates shuffle algorithm (from this answer, I modified it little bit for your situation): public static void Shuffle<T>(this T[] source) { Random rng = new Random(); int n = source.Length; while (n > 1) … Read more
[ad_1] If checking the username fails you still have extra data on that line that hasn’t been read in yet. Consider if the input data was the following username1;password username2;password When you read the first line and the username does not match you have password dangling on the current input line. So now your input … Read more
[ad_1] You have extra stars. The function should be void assign_memory_for_board(int ROWS, int COLS, int *** board) { *board = new int*[ROWS]; for (int i = 0; i < ROWS; i++) { (*board)[i] = new int[COLS]; } } 3 [ad_2] solved Allocate memory 2d array in function C++
[ad_1] The C++ equivalent of Delphi’s uses clause is #include statements for C++ header file. In this case, to use TIdHTTP in C++, you need an #include <IdHTTP.hpp> statement in your C++ code, and make sure Indy’s header files are in a folder in your project’s Includes search path. If you drop a TIdHTTP component … Read more
[ad_1] Try this: try{ cin >> input; if (cin.good()) { if(input > 11 || input < 0) { cout << “Under 10 you idiot!” << endl; ask(); } else { checkAnswer(input); } } else { cout << “Input a number!” << endl; cin.clear(); cin.ignore(std::numeric_limits<std::streamsize>::max(), ‘\n’); ask(); } }catch(exception e){ cout << “An unexpected error occurred!” … Read more
[ad_1] From section 7.20.3.2 The free function of the C99 standard: The free function causes the space pointed to by ptr to be deallocated, that is, made available for further allocation. If ptr is a null pointer, no action occurs. Otherwise, if the argument does not match a pointer earlier returned by the calloc, malloc, … Read more
[ad_1] Following is a way to do it in O(nlogn) :- int newarr[]; MinHeap heap; heap.push(0); for(int i=1;i<n;i++) { while(arr[heap.top()]<arr[i]) { k = heap.pop(); newarr[k] = arr[i]; } heap.push(arr[i]); } // No larger elements while(!heap.isEmpty) { k = heap.pop(); newarr[k] = -1; } Time Complexity : There are only n inserts and n deletes possible … Read more
[ad_1] In short, you can’t. There are several phone number length specifications around the world, and lack of country code can make its resolution dubious. For example, US follows the North American Numbering Plan, whose format is as follows: +1 (NPA) NXX-xxxx Where: 1 – US international Country Calling code NPA – Numbering Plan Area … Read more
[ad_1] Alright. I’ll put some effort into this. Kind of a refreshing thing to do. ^^ I modified your code, so the message length pattern is used. The c client sends a message to the server, the java client decodes it and sends it back to the client. So you have both direction of encoding … Read more
[ad_1] for(int index = 1; index <= 3; index ++) { Label label = (Label)this.Controls.Find(“Label” + index, false)[0]; label.Text = multiarray[rowcount – 1, index]; } 3 [ad_2] solved How to create loop for changing Lable[ID] in asp.net using c#? [closed]
[ad_1] You’re incorrectly printing the node’s value twice. You don’t need to check node->mid, as this is checked inside inorder(node->mid);. inorder(node) { if (node) { inorder(node->left); print(“%d “, node->value); inorder(node->mid); inorder(node->right); } } 0 [ad_2] solved Recursive and non-recursive traversal of three degree tree