Beginners - C++ Forum - March 2019 (Page 14)

Hello! This is some code designed to take the first character of a name inputted by the user and wipe the buffer clean to get ready for the next prompt. However...

[18 replies] Last: Probably the premiere woman in computer science, Rear Admiral (Lower ... (by closed account E0p9LyTq)

by vysero

Loop through vector

I want to loop through this vector: std::vector<DynamicSdmProtocol::DynamicSdm*> m_devices; I am getting an error when trying to loop through it ...

[3 replies] Last: Ah I see now, this was my fault, size() is correct. (by vysero)

by cash

vector insert function

My program should use the function find_if() to find the odd numbers in the vector and add a -1 in front of them, for some reason I'm getting an error? #...

[9 replies] Last: Iterator is more about making ++ polymorphic than about hiding the poi... (by keskiverto)

by Majeek

Improve Beginner Code

So I'm pretty new to C++ and after making this little game after I finished the 1st section of my lessons. (Section 2 is moving onto Unreal Engine) I wanted to ...

[5 replies] Last: Lets look at HiddenNumberGenerator. You want four unique digits, where... (by keskiverto)

by kyrresc

Shallow/deep copy

Hello, I have a small code here which results in an error message. class Dummy { public: int *num; int test; Dummy() { num = new...

[11 replies] Last: Constructor constructs a new object. Assignment modifies existing obje... (by keskiverto)

by aab2020

Please help

7. Consider the following declaration: class Strange { . . . }; (a). Write a statement that shows the declaration in the class Strange to overload th...

[1 reply] : Read this -> https://www.learncpp.com/cpp-tutorial/93-overloading-the-... (by salem c)

by avaldivia

What's wrong with my code?

I'm trying to code a program that asks a student for class , year, unit, grade and then displays those on a table then asks again for the next class unless they...

[4 replies] Last: So I did that but now instead of asking for Course #1 it just duplicat... (by avaldivia)

by elevona

grab first char of a string

Hi, I need help grabbing the very first character/letter of a string. As a beginner, I cannot use arrays or anything "Fancy" for this. I tried accepting the ...

[12 replies] Last: '\n' is not the null terminator, it is the newline/carriage return. ... (by closed account E0p9LyTq)

by Vetzo

strerror_s: unique_ptr and char array+delete

Hello Forum, How do you use std::unique_ptr with strerror_s? std::unique_ptr<char > pcMessage; pcMessage = std::unique_ptr<char >(new char ); strerror_s(p...

[3 replies] Last: Ah, thank you both. (by Vetzo)

by jjordan33

Beginner to class problem

Hi, I'm a student, and my c++ class has an online homework called zybooks and it's a mixture of participation and some challenges. We've begun classes, and it'...

[3 replies] Last: Is virtual something that should be used for classes in general? vi... (by AbstractionAnon)

by Majeek

"int" to "vector <char>"

I would normally just do "Vector.push_back(String )" in a for loop (for strings) but I cant do Int with integers, so how could I do this? void HiddenNumberG...

[4 replies] Last: Lines 2 and 3 are creating a duplicate variable name. Oh well how d... (by AbstractionAnon)

by jefazo92

Trouble passing two digit hex values from .txt file into array

Hi, I am trying to use stream to open a .txt file and pass the data inside it into an array. However, I have the problem that when I pass the file (see below) ...

[9 replies] Last: I would do it as a vector and then extract the array from it if you NE... (by jonnin)

by jjordan33

reversing struct array's rows

Would this take the struct array in temp and reverse it into temp2, then finally flipping the original image in im.pic? for (int i = 0; i < im.rows; i++) { ...

[8 replies] Last: That's some sick code. Thank you. (by jjordan33)

by AL88

Why is this segfaulting?

I'm trying to write my own address card database program and I am testing out different things like sorting alphabetically, writing a vector to a test file and ...

[1 reply] : Maybe give your vector a size? vector<addressCard> spareVector(numbe... (by salem c)

by Chris26

Integer cin

Hello, for example i have this code int a, b; cout << "enter a number " << endl; cin >> a; cout << "enter a number " << endl; cin >> b;...

[4 replies] Last: Oh, so 1 3 2 should result in a=1 and b=2. (by salem c)

by redfury

Assigning value to constant integer in Class

Hello, I just started making the following program, Make a class Pointer Declare a 2D integer pointer as private data member in it. And a const int size. M...

[5 replies] Last: Also if you're using modern C++ you could assign the value in the defi... (by jlb)

by JayGln

pragma or ifndef?

I was finishing up an exam my professor gave me with only part of the .h file to answer some multiple choice questions. I wanted to try and figure out where he ...

[11 replies] Last: Funny how these topics reappear so regularly. #pragma once was once... (by Duthomhas)

by chrispy232

Error binary operator << in creation of calendar

when I try to run the program, in lines 24 and 53 are giving me a binary error. If Anyone can help ASAP, greatly appreciated. #include<iostream> #include<i...

[1 reply] : Why don't you enclose your code with code-tags? Expect you that we cou... (by nuderobmonkey)

by salem c

Help Required

Another zero-effort codechef problem poster. If your only skill is copy and paste, then just give up now. Otherwise, grab a pencil and paper and start sketchin...

[4 replies] Last: I will if you can point to it. If i see it I will, but if you already... (by jonnin)

by AL88

How can I replace the existing vector?

How can I replace the existing vector on line 170 with what is read from the file? What can I use instead of pushback(that doubles the vector size). I tried rep...

[1 reply] : Use std::vector 's erase() or clear() methods before you start pu... (by closed account E0p9LyTq)

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Beginners - March 2019 (Page 14)