c++

[Solved] Named int vs named float

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The comment in the link says “integer, pointer and member pointer template parameters aren’t lvalues” (emphasis mine). It does not say that named integer variables are not lvalues – they are. If there were such a thing as floating-point template parameters, then they wouldn’t be lvalues either; but named floating-point variables still would be. solved … Read more

[Solved] Does the stream operator exist for class member functions?

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It can be done easily like this: #include <iostream> class A { public: std::ostream &debug() const { std::cerr << “[timestamp]” << “[DEBUG]”; return std::cerr; } }; int main() { A a; a.debug() << “Test”; } But the important question here is: Should we implement it in this way? In my opinion, NO! Because you are … Read more

[Solved] What is different between while(aPointer) and a if(aPointer) in C++? [closed]

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In the first example, the loop runs until the pointer itself becomes null, which it never does (instead, it’s eventually incremented past the end of the buffer, whereupon the program exhibits undefined behavior). In the second example, the loop runs until the character pointed to becomes zero – which it does once the advancing pointer … Read more

[Solved] Getting a C++ program to write to a file [closed]

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It sounds like you’re saying you’re printing numbers to stdout and they’re going off the screen. Since you’re using C++ you can replace cout in your output instructions with an ofstream (output file stream) like so: #include <fstream> // … ofstream outFile(“myNums.txt”); // … outFile << myNum; An easier way if you already have the … Read more

[Solved] Getting error “Incorrect syntax near ‘,'”

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You are appending mainmenu.tbxSelected whereas I suspect that your intention was to append mainmenu.tbxSelected.Text The former would probably result in a fully qualified typename in your WHERE clause, which would contain commas. As an aside, you should be aware that constructing SQL in this way leaves you potentially open to SQL Injection attacks. If that’s … Read more

[Solved] Generating random number between 4 ints [closed]

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If those ranges are inclusive, you have (r1b-r1a+1)+(r2b-r2a+1) numbers to choose from. Use rand (or a better random number library) to pick a non-negative integer up to (r1b-r1a+1)+(r2b-r2a+1) (exclusive), then map that result back onto the ranges. int pick = rand() % ((r1b-r1a+1)+(r2b-r2a+1)); pick += ( pick < (r1b-r1a+1) ) ? r1a : r2a; Assumptions: … Read more

[Solved] How to get the value of string in c# from a testmethod In C# [closed]

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To pass a value from MyFirstTest to RunLookupMyString, you should modify the RunLookupMyString method to take the type of argument you want to pass. Then you can pass it by calling the method: [CodedUITest] public class ManyTests { [TestMethod] public string MyFirstTest() { string a = “AAA”; return RunLookupMyString(a); } } public static string RunLookupMyString(string … Read more

[Solved] HOW to back for the beginning if the user press any key except 1 or 2 or 3? [closed]

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Use do–while loop and set the condition to while(L != ‘1’ && L != ‘2’ && L != ‘3’);: do { L = getch(); switch (L) { case ‘1’ : system(“cls”); printf(“111111111111111”); break; case ‘2’ : system(“cls”); printf(“222222222222222”); break; case ‘3’ : system(“cls”); printf(“33333333”); break; default : sleep(0); } } while(L != ‘1’ && L … Read more