[Solved] istringstream to int8_t produce unexpected result

[ad_1] The problem is int8_t is implemented as char. The implementation of the input stream is working like this: char x; std::string inputString = “abc”; std::istringstream is(inputString); is >> x; std::cout << x; The result is ‘a’, because for char the input stream is read char for char. To solve the problem, provide a specialised … Read more

[Solved] Program crashes when a function returns empty

[ad_1] The main problem I see with your code is the reading loop, it has mainly two issues Read: Why is while (!feof(rPtr)) always wrong. You must check the return value of scanf(), and prevent scanf()‘s from overflowing the destination buffer, so the loop condition should be while (fscanf(rPtr, “%14s%lf%lf%lf”, fromDb.name, &fromDb.dArea, &fromDb.dLength, &fromDb.dFormFactor) == … Read more

[Solved] WPF creating grid from XAML in code-behind

[ad_1] You can do that by making your “existing grid” a separate UserControl. First, you need to add a UserControl via [Add]->[User Control…]->[User Control (WPF)]. Next, put your “existing grid” inside the added UserControl. YourExistingGridControl.xaml <UserControl x:Class=”Your.Namespace.YourExistingGridControl”> <Grid> … YOUR EMPTY GRID WITH ALL THE COLUMNS, ETC. … </Grid> </UserControl> Now, you can create as … Read more

[Solved] C: unable to print from file

[ad_1] In your: if ( buff == ‘\n’ && fe && fn ) //<– I assume you want to check if an empty line was read by checking it against the newline character. However, buff is not the character; it is a pointer to were all the characters read are stored. To check if the … Read more

[Solved] C++: Using remove_if to filter vector on a condition

[ad_1] Below example demonstrates the usage of erase-remove_if. limit is captured by reference and can thus be modified outside the lambda: #include <vector> #include <algorithm> #include <iostream> int main() { std::vector<int> vec{0,1,2,3,4,5,6,7,8,9}; int size = vec.size(); for (int limit = 0; limit <= size; limit++) { vec.erase(std::remove_if(std::begin(vec), std::end(vec), [&limit](int i) { return i < limit; … Read more

[Solved] Enable MVVM object only if three other MVVM objects are already enable

[ad_1] you could use this: //Button B private bool _enableButtonB; public bool EnableButtonB { get { return _enableButtonB; } set { _enableButtonB = value; OnPropertyChanged(“EnableButtonB”); EnableButtonA=value; } } private bool _enableButtonC; public bool EnableButtonC { get { return _enableButtonC; } set { _enableButtonC = value; OnPropertyChanged(“EnableButtonC”); EnableButtonA=value; } } //Button D private bool _enableButtonD; public … Read more

[Solved] How can i extract the info between ” ” ? C#

[ad_1] Try this demo, put it in a Main method of a console application (it uses Regex so you have to add line “using System.Text.RegularExpressions;”): string input = “AT+CMGL=\”ALL\”\n+CMGL: 0,\”REC READ\”,\”+40728072005\”,,\”12/06/29,13:04:26+12\”\npassword,1,ON”; var matches = Regex.Matches( input, @”\””(?<msisdn>\+\d*)\””,.*,\””(?<date>\d{2}\/\d{2}/\d{2},\d{2}:\d{2}:\d{2}\+\d{2})\””.*\n+(?<passwd>[^,]*),(?<itemno>\d*),(?<command>\w*)” , RegexOptions.Multiline); foreach (Match m in matches) { Console.WriteLine(m.Groups[“msisdn”].Value); Console.WriteLine(m.Groups[“date”].Value); Console.WriteLine(m.Groups[“passwd”].Value); Console.WriteLine(m.Groups[“itemno”].Value); Console.WriteLine(m.Groups[“command”].Value); } Console.ReadKey(); Basically, regular expression … Read more

[Solved] How to encrypt header files in C [closed]

[ad_1] You can encrypt your source with any good encryption tool, of course.But obviously you can’t compile it anymore … But perhaps a library could help you. You can build a library which contains your GSM stuff. Then you and others can call the functions from the library, the only file you have to distribute, … Read more

[Solved] What does “%.7le ” in printf means?

[ad_1] .7 is the precision and le means normal form. double x = 0.012345678910; printf(“%.7lf\n”, x); // 0.0123457 printf(“%.7le\n”, x); // 1.2345679e-02 printf(“%.9le\n”, x); // 1.234567891e-02 Edit See Eric Postpischil’s unswer below, it’s way more comprehensive than this one. 2 [ad_2] solved What does “%.7le ” in printf means?

[Solved] regarding ObservableCollection in c#

[ad_1] ObservableCollection implements INotifyPropertyChanged. This interface exposes events that allow consumers of your collection to be notified when the contents of the collection change. This is mainly used when binding in WPF, for example let’s say we have an ObservableCollection<string>: ObservableCollection<string> MyStrings { get { // return a collection with some strings here } } … Read more

[Solved] Redrawing only some objects? [closed]

[ad_1] Because you provided no code samples we can just assume you redraw your scene every timer-tick and you might draw the just random-generated locations of the trees at every tick event, a solution like suggested by others is to generate the random coordinates of the trees before you draw the first time, save those … Read more

[Solved] Find Highest Divisible Integer In Set By X

[ad_1] Here is an adaptation of your code that doesn’t require storing intermediate results: private Int32 GetHighest(Int32 y, out Int32 totalMax) { var Set = new Int32[] { 4, 3, 2 }; totalMax = int.MinValue; int itemMax = int.MinValue; foreach (var x in Set) { int total = x * (y / x); if(total >= … Read more