General C++ Programming - C++ Forum

Hi i have a Time class that calculates a deltaTime and i thought it would be neat to make it so that you can retrieve it using both: Time.deltaTime ...

[3 replies] Last: While we're at it, why not just use the <chrono> facilities? They do a... (by Duthomhas)

by Thelps

Convert char from filestream to lowercase..?

Hi all, Please read before posting: I'm taking data from a ifstream filestream (that's reading from a .txt file) and placing it into a char variable. T...

[1 reply] : tolower(currentChar); That doesn't change currentChar. It's a funct... (by Repeater)

by slei

multi line macro in multiline macro

hey is it possible to have multiline macros in muliline macros? not sure how to do this, if anyone can help, here is an example: #define A(B)\ int count = 0;...

[3 replies] Last: oh man, i didn't even notice I'm trying to use a loop outside of a fun... (by slei)

by CalebS

I/O records seperated by {}

New to file I/O and c++ in general, would greatly appreciate any help or if someone can point me in the general direction. The goal is to read in a file where ...

[2 replies] Last: #include <iostream> #include <fstream> #include <string> #include <ve... (by lastchance)

by elevatedsounds

Keypad State Machine

I'm working on a state machine which displays the letters A, B, and C in that order. If at any point while displaying the letters I press the 'A' key, I should ...

[no replies]

by Chilli Mustard

division in C++

Hello friends, I have a small question. why does cout << 11 % 3 << '\n'; gives 2 as an output? I am really confused because the answer from the calculator...

[5 replies] Last: Remember, floating-point constants are type double by default. In List... (by sm2345110)

by chunfeng

c++ function return

#include<iostream> using namespace std; class test{ public: test(); ~test(); int a = 0; }; test* GetTest(){ } int main(){ te...

[1 reply] : why would it be? you don't set anything to null anywhere. temp is ... (by jonnin)

by AlexCantor

C++ Posts by a forum member

Is there a way to see list of all threads that have a post by a given forum member. For example, there are many threads that have excellent posts (i.e. input...

[1 reply] : Perhaps a more experienced user knows, but I don't think that's availa... (by Ganado)

by blaq

Dynamic Array of Classes w/ defaults

Hi, I made an class that requires passing 2 variables by default: class TestClass { public: TestClass(int, int); ~TestClass(); } TestClass::TestClass(...

[1 reply] : Are you sure about the "need"? If you would not need "dynamic array",... (by keskiverto)

by captainsasss

Generating random number input (to be used 6 times)

I am creating a random guessing game in which I need to generate an input 6 times. I know how to generate a random number but I don't know how to generate a ran...

[2 replies] Last: Basically a a random number is generated and the user inputs a guess. ... (by captainsasss)

by Mk87

How to implement 3 digit binary numbers into 2D vector in C++?

I want to write a C++ code contain all 3bits binary numbers into a 2D vector like the following matrix: 0, 0, 0, 1, 1, 1, 1 0, 1, 1, 0, 0, 1, 1 1, 0, 1, 0,...

[4 replies] Last: Well, you will have a vector< vector<int> > if you change line 6 of my... (by lastchance)

by matiasp1998

I NEED HELP ASAP!!!

ok guys, im trying to code a grade calculator for my programming class and my if/else if block is screwing me over because it equates y/n to elicit the same res...

[5 replies] Last: nvm, got it (by matiasp1998)

by jimothy87

Why am I receiving the following error code: "undefined reference to 'displayMonthlyReport (MonthlyBudget const&)'

/* Program Description: Asks for monthly living expenses. Calculates and displays the difference between the expenses and budget. Inputs Needed: Student...

[2 replies] Last: THANK YOU (by jimothy87)

by raptorjesus

Need help opening a file from user input.

I get an error that says, "no matching function." On the line with the file.open() function. #include <iostream> #include <fstream> using namespace std; int...

[2 replies] Last: I am using c++11 and i still get that error message for some reason. ... (by raptorjesus)

by stav

sfml texture shared_ptr error

Hi Im using sfml and im trying to load a texture Ive made a map of strings and textures, m_textures: std::map<std::string, std::shared_ptr<sf::Texture>>...

[6 replies] Last: If the MyAssetManager object is static/global are you sure that it has... (by Peter87)

by dbag

Coordinates Reprojection with GDAL

So I am trying to re-project a coordinate from WGS 84 / UTM zone 33N (Meters) to WGS 84 (DD). I have tried the below method but when it gets to the portion to t...

[2 replies] Last: Your right it does appear to be returning a null pointer (by dbag)

by LTJska82

Pulling data from a text

I'm new to C++ and I'm having issues pulling data from a .txt file. What I have is a .txt with multiple entries per line; it looks like. firstName midName last...

[1 reply] : Your code will look something like this: ifstream infile(filename); ... (by jonnin)

by Colin Peeris

Compiling .cpp files separately

Hi. I would like to use a C++ library to deal with sparse matrices. One library that I came across is called ALGLIB. When I downloaded and unzipped the file,...

[1 reply] : VS2015 has some kind of solution explorer, I think. If you right click... (by Repeater)

by offset221

C++

Coding for a rock paper scissors game Function > bool isMoveGood(char move); My Response > void test_isMoveGood() { if ( (char move == R) || (char ...

[7 replies] Last: there isnt even any code past a cin and cout statement if you make a 2... (by jonnin)

by YikUTM

How do get enemies to run around the maze game

I managed to write a maze game but I wished to add enemies to run around. Can somebody tell me how to do this? #include <iostream> #include <windows.h> ...

[1 reply] : what do you want them to do? you can plop them down somewhere and ev... (by jonnin)

C++

Forum

General C++ Programming - January 2018