General C++ Programming - C++ Forum - January 2020 (Page 2)

Having trouble running Permutations in Do-while loop

I'm still pretty new at programming, but I know enough to piece together other people's code usually. I'm currently stuck at trying to get a string to run a per...

[5 replies] Last: Perms don't repeat chars, unless the input string has repeating chars.... (by dutch)

by julie2019

CppCast: Circle

Rob and Jason are joined by Sean Baxter. They first talk about a blog post and some papers headed for the upcoming ISO meeting in Prague. Then they discuss Circ...

[no replies]

by yabi2943993

Why does this program not output anything?

#include <iostream> int main(){ int x; char c; int o; std::cin>>x>>c; bool run1=true,run2=false; while(x!=0 ){ x=o;...

[8 replies] Last: Thanks @yabi2943993, Its appreciated to see the full running code. T... (by eugenedakin)

by congard

Access to elements of a homogeneous structure

Hi! How can I better access elements of a homogeneous struct? Here are the options to consider: struct Test { string s1 = "test1"; string s2 = "tst2";...

[7 replies] Last: There are also library-based solutions: Antony Polukhin's magic_get... (by mbozzi)

by DMX

friends, inheritance and forward declaration

Hello, I am trying to code the example given in "Ruminations on C++" Koenig, Moo, §8.3 but I don't get it to run like shown in the book. Here is my minimized...

[6 replies] Last: Thanks, as far as I can see there were two problems: 1) expr.hpp doe... (by DMX)

by eladb

MFC debug assertion failed

Hi all, i have some issue on my first MFC project. i built some new windows that delete txt file according to the user input. for some reason, after first ...

[8 replies] Last: hello again. just open a new MFC project and copy all the code. its w... (by eladb)

by yabi2943993

Factorial division

I want to see, if the factorial of a number n is divisible by a number p. For that I got: #include <iostream> int main() { int p,n; while(1){ ...

[13 replies] Last: reminds me of a fight about performance... "yours is 5x slower than mi... (by jonnin)

by tryingtoleeearn

HI!

#include <iostream> #include <stdlib.h> #include <unistd.h> #include <time.h> using namespace std; int Aiming() { if (rand() % 67 < 10) return 11; ...

[2 replies] Last: I need to draw the background in c++ hmmm.. graphics or moving graphi... (by tryingtoleeearn)

by yabi2943993

Triangle types

I want to make a program which takes 3 inputs by the user. Each of those numbers should be the border of a triangle. There are three main types of triangles: ...

[10 replies] Last: No it does not pass, enoizat Thanks lastchance! (by yabi2943993)

by neelarunabh

Singly Linked List

I have the following code. But, the program is terminating without any user input. I want to know how this can be fixed. #include <iostream> #include <ccty...

[2 replies] Last: I have the following code Where did you get it? Look at your StringL... (by Enoizat)

by Alatar

crash: wrong declaration order

Hi! I recently ran into a crash, where I had declared member objects of a class in the wrong order. Basically, member A was using member B, but member B was ...

[9 replies] Last: [quote=Alatar]What do you think? It you feel like abandoning member i... (by Enoizat)

by eugenedakin

IDE for Win/Raspberry Pi/Linux/Arduino

Hello Everyone, Just a general question - Is there an IDE which programs in C/C++ that works across these various platforms: Windows, Raspberry Pi, Linux, A...

[4 replies] Last: Yes, UWP looks good and I'll need to learn a little more about it. The... (by eugenedakin)

by tryingtoleeearn

Asking..

Why I cant any of this on dev c++? too many errors. Cant test any of those. http://cplusplus.happycodings.com/games/

[4 replies] Last: My "a bit outdated, no C++17" comment was about the the CPlusPlus tuto... (by deleted account xyzzy)

by closed account 1bfSwA7f

capitalizing using toupper

tttt

[5 replies] Last: The sheik has ridden off on his camel by the look of it :( (by againtry)

by yabi2943993

(TLE) How to optimize this code

This topic is duplicated... I am sorry for the error. I didn't notice while uploading...

[1 reply] : Please don't post duplicates. http://www.cplusplus.com/forum/general/2... (by kbw)

by yabi2943993

All the points of the diagonal of a matrix

I want to find all the points which are located on the diagonal of the matrix. The input consists of two parts. One is the number of rows(and columns cuz they ...

[1 reply] : for a square matrix? What are you not seeing... you have been asking... (by jonnin)

by vaderboi

Is it possible to overload object so that it does something if passed as an argument?

Is it possible to overload some operator of a class such that it will do something if passed as an argument? Like if I instantiated Foo foo in main() and then...

[10 replies] Last: there may be some way to keep an always on thread for each class insta... (by jonnin)

by eladb

CPP files

hello all, i wondring where am i wrong. i'm trying to edit a file line, meaning replace one line with another one. this is my program -> fs.open(filenam...

[2 replies] Last: what is the value of i in str and str[i+1] when the line is blank? Ac... (by jonnin)

by yabi2943993

Carry numbers to the left

Hi. I was trying to do this exercise: When we learn to add numbers, they soon tell us that of "taking one": when the two digits we add reach the ten we have "ca...

[1 reply] : How does the mistake show? Does the compilation fail? Does the progra... (by keskiverto)

by HSafy

how to emit or write a map of maps into a yaml file ?

So I have couple of virtual goggle .. each one of them has different calibration parameters. I decided to save these parameters into a yaml file (as a configura...

[2 replies] Last: That did it , thanks (by HSafy)

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General C++ Programming - January 2020 (Page 2)