No, there’s no way to tell whether an array element has been initialized or not. You could use calloc() instead of malloc(), this automatically initializes everything to 0, so you could do: if (array[0] == 0) { array[0] = 5; } else { array[0] *= 3; } But this won’t work if 0 is a … Read more
You may want to try out the following regex. Regex101 link ((?:\?.*?&|\?)journey=)[^&]* Try out the following code to replace the value of journey to replacement string url = “http://www.whitelabelhosting.co.uk/flight-search.php?dept=any&journey=R&DepTime=0900″; string newUrl = Regex.Replace(url, @”((?:\?.*?&|\?)journey=)[^&]*”, “$1″+”replacement”); Remember to add the following to your file: using System.Text.RegularExpressions; You can do the same for DepTime using the following … Read more
try strcpy instead of assigning the value with an =: strcpy(persons[0].name, array[0]) 4 solved How do I save a string to a struct array member? [closed]
The return value of printf is the number of characters transmitted to the output stream or negative value if an output error or an encoding error (for string and character conversion specifiers) occurred (from here, emphasis mine) and “5 5” are three characters (namely “five space five”). So the last number printed is 3. solved … Read more
Even I get an warning a function returns an address from local variable, it compiles. Isn’t it then UB of compiler? No, but if it were, how could you tell? You seem to have a misunderstanding of undefined behavior. It does not mean “the compiler must reject it”, “the compiler must warn about it”, “the … Read more
Does the SFML String2d class implement IDisposable? Do you dispose all instances correctly? It might be that the finalizer thread is disposing them when they are in an invalid state. 0 solved Can’t find the source of .NET error, need Help
To get the part of the string after the first space: string city = str.Substring(str.IndexOf(‘ ‘) + 1); This will also give a result even if there happens to be no space in the string. The IndexOf method will return -1 in that case, so the code will return the entire string. If you would … Read more
This should look more like this: DateTime now = DateTime.Now; DateTime after1month = DateTime.Now.AddMonths(1); SqlCommand cmd = new SqlCommand(“SELECT * FROM TABLE WHERE THEDATE BETWEEN @now AND @after1month”, connection); cmd.Parameters.Add(new SqlParameter(“@now”, System.Data.SqlDbType.DateTime).Value = now); cmd.Parameters.Add(new SqlParameter(“@after1month”, System.Data.SqlDbType.DateTime).Value = after1month); Sometimes you can do it directly on SQL Server side using query: SELECT * FROM TABLE … Read more
Well the simple thing is here you would be good to go even if you didn’t use casting in these 2 statements char** sa = (char**)a; char** sb = (char**)b; Because conversion from void* to char** is implicit. This would also be fine (provided you assign it to correctly qualified variable name). const char** sa … Read more
I actually was able to fix this, the problem was that the while loop listened to the timer the first time, then after that just started going off on it’s own. I switched it to a if, with an else statement and everything works as intended now. int i = 0; private void timerPaste_Tick(object sender, … Read more
I have a local copy here with Parse written as the rather opaque: public void Parse(string[] args) { // deliberately opaque, not that it would make any difference string fieldName = (new string(‘S’, 1) + “ilentX”).Substring(0, 6); GetType().GetField(fieldName).SetValue(this, true); } It works fine. I do not believe the problem is what you think it is. … Read more
In the following, I use the term “character” to denote something that can be displayed on a screen and printed on paper by a computer. The official name in Unicode is “code-point”. The letter ‘a’ is a code-point – it is “character” number 97 (0x61), so is a ‘ྦྷ’ (character 4007, 0xfa7) Unicode as such … Read more
Correcting compile time errors is not a hard task. Follow error messages and try to find out the problem. I will show you some examples in your code to solve errors. Your code has many error which shows you need practice more in C++. The declaration of showMenu is void showMenu(int &) but you are … Read more
You don’t have an array; you have a pointer. The size of the pointer is measured in bytes, not bits. sizeof is evaluated at compile time and is constant for any given expression or type. It does not depend on the number of “filled” elements in an array (or pointer to some space that holds … Read more
You have two different ints which both happen to have the same name: The global rezultat declared at the top of the file, and the function parameter rezultat in the parameter list for function pop(). You pass the value of the global rezultat into pop(), then you assign a new value to the function parameter … Read more