[Solved] Please explain this “if” in C language
[ad_1] It checks to see if the pointer curl is not null (a null pointer is equivalent to the value 0, which is false when considered as a Boolean). [ad_2] solved Please explain this “if” in C language
c++
[Solved] Returning true if successful in deleting the node in C++
[ad_1] Your implementation is all wrong. For one thing, you are new‘ing temporary Node objects that you shouldn’t be allocating at all, and you are leaking them. And, you are not actually outputting the value of the Node that you delete. And, your whole function can be made much simpler, as you don’t need to … Read more
[Solved] Why can I convert from int ** to int * in the case of the two-dimensional array, but not in the case of the array of pointers
[ad_1] You might want to learn how these objects are laid out in memory: int array[][3] = { {1,2,3}, {4,5,6}, {7,8,9} }; int *p_array = (int *) array; This creates an object array of type int[][3] in memory (in this case stack) physically laid out in a hypothetical (16-bit word size) architecture as: array 0x8000: … Read more
[Solved] C# Select all elements from List which exists in another list
[ad_1] Now, what I want to do is select all DISTINCT by name elements from listA where the dictionary Attributes key equals any value from the Filters list. To define a distinct by property you could use define a group by name and take the first one. To define a filter, you could use Keys … Read more
[Solved] In C ,we use %x.ys for string manipulation. What it will be in C++?
[ad_1] The std::setw() I/O manipulator is the direct equivalent of printf()‘s minimum width for strings, and the std::left and std::right I/O manipulators are the direct equivalent for justification within the output width. But there is no direct equivilent of printf()‘s precision (max length) for strings, you have to truncate the string data manually. Try this: … Read more
[Solved] What happens to an object during a pre-increment operation?
[ad_1] The pre-increment operator method returns a new object. Which invokes a constructor and, shortly later, destructor. Cls operator++(){i++; return *this;} ^^^ return by value. Means you need to be able to copy construct “Cls” Note you would normally write this as: Cls& operator++(){i++; return *this;} ^^^ To return the object by reference (and thus … Read more
[Solved] C++ Inputting numbers into array and outputting them [closed]
[ad_1] int num[10]; for(int i = 0; i < 10; i++){ i = num[i]; cout << num[i]; } In the above piece of code you haven’t stored anything to the array you declared. So it would print some random values out. The following would work as you think : int num[10]={0,1,2,3,4,5,6,7,8,9}; for(int i = 0; … Read more
[Solved] C++ Process32Next only returns the same process
[ad_1] As specified by @BarmakShemirani , I shall use Unicode function as wcout or wcscmp. Thanks. 4 [ad_2] solved C++ Process32Next only returns the same process
[Solved] Why this code gives error? It uses parenthesis in multi line macros.I found this on an article in GeeksforGeeks
[ad_1] Using clang, the code actually compiles, but it gives some warnings. The warnings are generated because of the parenthesis and braces in the macro definition, or – to be more exact – because of the lack of braces in the if-else statement. You can rewrite the code to the following form: #include <stdio.h> #define … Read more
[Solved] Addition of 2 numbers and give corresponding outputs depending on the number of digits got from the addition using C [closed]
[ad_1] As an idea. It is enough to check whether the result of the addition is less than 10 and greater than -10 if the numbers are signed.:) [ad_2] solved Addition of 2 numbers and give corresponding outputs depending on the number of digits got from the addition using C [closed]
[Solved] Import data from opened excel files [closed]
[ad_1] Try this code: OleDbConnection oledbConn = new OleDbConnection(); try { string path = HttpContext.Current.Server.MapPath(“~/virtual path for your file”); if (Path.GetExtension(path) == “.xls”) { oledbConn = new OleDbConnection(“Provider=Microsoft.Jet.OLEDB.4.0;Data Source=” + path + “;Extended Properties=\”Excel 8.0;HDR=Yes;IMEX=2\””); } else if (Path.GetExtension(path) == “.xlsx”) { oledbConn = new OleDbConnection(@”Provider=Microsoft.ACE.OLEDB.12.0;Data Source=” + path + “;Extended Properties=”Excel 12.0;HDR=YES;IMEX=1;”;”); } oledbConn.Open(); … Read more
[Solved] Output is not giving garbage value
[ad_1] Reading uninitialized variable follow below rules, Static variable are by default initialized to zero means local static or file scope variable (global one). Non-static variables which local to function are indeterminate. Reading them prior to assigning a value results in undefined behavior. compiler is free to do any thing. It can be zero, it … Read more
[Solved] magic square program help C# [closed]
[ad_1] I edit your solution. This works for rows and columns. static void Main(string[] args) { int[,] S = null; int N = 0; string line; //to hold one line of file string[] token; //to hold each token in line char[] separator = { ‘,’ }; //open file try { using (StreamReader sr = new … Read more
[Solved] Testing for float equality in C [duplicate]
[ad_1] float has less precision than double, which would be the default type used for floating point literals. Since 6.7 cannot be represented with a finite number of binary digits, the less precise float representation does not equal the double representation. [ad_2] solved Testing for float equality in C [duplicate]
[Solved] how to remove all tag in c# using regex.replace [closed]
[ad_1] You should never use regex to parse html, you need html parser. Here is an example how you can do it. You need to add this reference in your project: Install-Package HtmlAgilityPack The code: static void Main(string[] args) { string html = @”<!DOCTYPE html> <html> <body> <h1>My First Heading</h1> <p>My first paragraph.</p> <table> <tr> … Read more