C++

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Beginners - August 2014 (Page 21)

Hi, I just learned about looping in c++. I came across two questions that I was unable to answer. I need help understanding the idea. 1) Is the following state...

[12 replies] Last: Let's take this statement: 1, 024; According to the way the comma o... (by cire)

by abdalimran

Taking input as condition into while loop

In C I can write the following code. There is no error. while(2 == scanf("%d %d", &n1, &n2)) { ... ... ... } But in C++ when I write the following...

[4 replies] Last: that's what while continue and break does. you may also want to ma... (by codekiddy)

by ch4k3r82

Am I using std::unique_ptr the wrong way?

I'm using gcc-4.9.1 to compile this code that list the contents of directories recursively. I tried to wrap the DIR ptr in a unique_ptr but then it doesn't comp...

[4 replies] Last: I get it now. That is why clang was giving this: error: data member in... (by ch4k3r82)

by ameeraaly

Reading data from a text file into variables and arrays

Hi, I'm trying to read a text file and store the data into some variables and arrays. Here is an example of the data: param T := 3 ; param alpha := 1 1 2...

[1 reply] : You can load the file into a stringstream for easier manipulation. Als... (by Aceix)

by heyyouyesyouiloveyou

Dynamically created objects seem useless, don't understand.

Hello. So in order to create a C++ object on the heap, you need a pointer on the stack. To me, it then seems useless, because you have to have declared the ...

[7 replies] Last: Thank you cire! (by heyyouyesyouiloveyou)

by dominover

Indirect Object?

Hi What is an 'Indirect Object' in C++? Thanks

[2 replies] Last: I typed "Indirect Object' in C++" into google and the only link from r... (by codekiddy)

by Polairis

Repeating Loop

This is a totally trivial console program but I'm new to cpp and I can't figure out how to make the menu redisplay if the user inputs the wrong answer. Thank...

[3 replies] Last: Then what does happen when an out of range number is entered? This wa... (by Chervil)

by T4l0n

loop in switch

I wanted to have the loop closing when value x is 1, 2 or 3, it works if i write only x!=1 but with or operator i can't manage to make it work, thanks in advanc...

[3 replies] Last: thanks (by T4l0n)

by jub4jive

understanding code

Hi, I am currently learning about loops in c++. Recently I came across a topic called 'end of file' condition. The following code was provided as an example in ...

[9 replies] Last: :O) (by Duthomhas)

by jub4jive

code question

Hi, I just learned about looping in c++. I came across the following problem: Write a program that asks the user to type in numbers. After each entry, the progr...

[1 reply] : one problem is that size of an array must be known at compile time: ... (by codekiddy)

by Rashad2

structs

Hi guys. I have a question about structs. This is an example from the site here. Outside the struct they have mine and yours. Why are they outside and why cant ...

[1 reply] : mine and yours are struct instances, these are the actual objects whos... (by codekiddy)

by Zloi

Getting text from the lineEdit

I'm sorry for the, I think, most stuoid question ever asked, but how can I get the text from lineEdit in Qt and put it into a variable? This doesn't seem to wo...

[6 replies] Last: Oh< Thank you! (by Zloi)

by ultratoke

struct and SetConsoleCursor

When I step through my program using VS13 debugger it works correctly but when I let the program run on its own it only outputs my 'x' to the console completely...

[2 replies] Last: Lol, no one even helped you. (by long int main)

by Ascendant78

Adding an 'if' statement into a 'switch' statement.

Ok, I'm trying to use a 'switch' statement, but with two possible scenarios for one of the switches. If the time is greater than 1min, I want it to output the ...

[3 replies] Last: Ok, got it working now. Thanks for the help. Can't believe I overloo... (by Ascendant78)

by RCB123

Doubt about code in C

Hello people I'm new in this. I'm trying programing this code but is saying me "Error: expected unqualified-id before if" And my code is this: if (ign.ign...

[6 replies] Last: Yes i follow each step (by RCB123)

by LKrebs

Send via serial? Help needed.

So, I'm having a small problem. It's probably extremely easy to solve but any help is much appreciated (I'm a complete C++ noob). The compiled version of the f...

[no replies]

by DeSurfer

Hi I'm recently started to learn c++

My goal is to learn how to create video games and i would like to know what is need in order to do so. I have been seeing people using SDL and something called ...

[2 replies] Last: Your best bet is to start learing DirectX. because it has the best doc... (by codekiddy)

by Richard 4234

Image Display (1,2)

I learned some console application and win32, now I want to learn how to display an image. I don't know how to do it and what compiler to use. Can you please te...

[34 replies] Last: I guess I can't ever close the topic now, since my other account got b... (by long int main)

by shs2017

Returning Static Reference

Hi I'm new this forum. I just joined because of an issue I couldn't figure out. I'm developing a matrix class for a Linear Regression Project I doing in my free...

[9 replies] Last: > invalid initialization of non-const reference of type 'matrix<floa... (by ne555)

by Ch1156

SFML 2.1 movement help (1,2)

Ok so I just started learning SFML and I love it so far and i'm trying to get a sprite to move fluidly but i cant seem to get it right. When I move it takes a s...

[30 replies] Last: Nevermind I did it :D I just stopped and did it step by step of what t... (by Ch1156)

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