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Beginners - July 2020 (Page 7)

pals, have to write a code which: Prints out for "n" nr. of times , the last result of the equation a+b-c , if the sum of all the results is bigger then...

[13 replies] Last: Maybe the 4th requirement does not mean the sum of all the results, bu... (by Manga)

by Jens Hirschmann

How to make a class "private"

As a minimal example, consider a library that provides a `Car`, and the `Car` has an `Engine` in it: car.h #ifndef CAR_H #define CAR_H class Engine {...

[7 replies] Last: Thanks. I've edited my post. (by dhayden)

by sparki

Conversion to string from int

Hi, why is the output some garbage value at the start of the first 2 bits? and then fine for the rest of the bits? I don't understand. Hope someone is able to h...

[1 reply] : That memset looks wrong. array is an int pointer, size 8 bytes (probab... (by Repeater)

by Xyz57

Code debugging assistance

I could use some help with debugging my code. I am not very good at debugging code so I could use some assistance with what I might need to change in order to g...

[4 replies] Last: BTW static const PI can best be put inside the class (it's not a data ... (by againtry)

by momof4

how to draw a number in the thousands

I have a function to draw numbers 0 through 999, but now I'm working on a project that is going to require numbers in the thousands and possibly ten thousands. ...

[2 replies] Last: How about: void display_number(int num) { for (char digit: to_s... (by dutch)

by newbie812

Read file and input into vector

Hey everyone! I am pretty new to C++ (just started this month) and will appreciate if someone can help me here. I have a text file with the following fixed con...

[5 replies] Last: Maybe something like this: #include <iostream> #include <fstream> #... (by dutch)

by momof4

move once per click

I'm making a very simple game, that involves something happening when a button is pushed. Trouble is though, when I click the button the action I want happens t...

[1 reply] : you need one of two things. first, check your tools to see if you hav... (by jonnin)

by BennysMaria

How can i change specific elements of an array?

Hello all! In the exercise that I'm working on it asks that I write an input statement that will allow the user to enter values for specific elements. here my ...

[1 reply] : #include <iostream> int main() { int a ; int b, c; std::cout << ... (by zapshe)

by HAL8999

What shouldn't you return from a local variable?

Hi. I'm learning C and C++ and read somewhere that you can't return local variables like so #include "stdio.h" typedef struct Foo { int fooval; } F...

[4 replies] Last: please note that a segfault is not guaranteed, so be careful when codi... (by ne555)

by momof4

Iterating through a list

I have a list of blocks that I have created, and I need to iterate through them and draw each one. here's what I have, but I keep getting an error : conversion ...

[3 replies] Last: This sort of problem is why we now have range based for loops: for (c... (by dhayden)

by John3682

Classes and fractions

hey yall , im suppose to do this assignment but i haven't studied classes yet (couldn't attend online class and forgot to watch the videos), and there`s this ti...

[6 replies] Last: After you watch the videos, search for "rational" on this site. There ... (by dhayden)

by mrpear2020

C++ regex clarification

Can you please clarify if this is the correct approach to retrieve values of "x" and "y" from a given string? #include <iostream> #include <string> #inc...

[3 replies] Last: Raw strings were probably added mostly for regexes since otherwise the... (by dutch)

by ElusiveTau

Is it possible to initialize a class' reference member inside a copy-constructor?

In the copy constructor for Person , how do I create a copy of Alice's pet and assign it to the copied Person's pet reference? In my current implementation, ...

[12 replies] Last: doesn't compile, conversion from `int' to `Person*' also, stack overf... (by dhayden)

by MaxGreen

do while

hey pals, have to write a code that : identifies how many times variable b got incorrect values. Var.b got randomly values from 0-100, but only values from...

[3 replies] Last: thanks (by MaxGreen)

by Shruthi LS

Range based for loop in cpp

The below code snippet is python range based for loop with the increment of steps by 2. for x in range(1,10,2): Result:1,3,5,7,9 print(x) ...

[9 replies] Last: You may use C++17 and overload of << operator #include <iostream> ... (by TomCPP)

by Alex4321

C++ debugging help

I have an assignment where I need to find the area of a cylinder. I am only able to get the output of the circumference and the area, but they are both 0. Curre...

[5 replies] Last: Just for interest sake after a bit of compaction etc ... #include <i... (by againtry)

by ElusiveTau

How to write a method to cout elements (of user-defined type) from sequential containers?

I'm designing a little function for general purpose use. The function is called StrItems() and its job is to return the string-representation of a sequential ...

[6 replies] Last: [quote=ElusiveTau]My guess is that execution tries to run to_string(ob... (by Ganado)

by Mif

Can anyone help me with switch loop?

The code compiles and I don't get any error the problem is the loop when you choose for the first time the program does what is asked to, but starting at the se...

[6 replies] Last: glad you got it. FYI c++ does not recommend C-strings and printf, sc... (by jonnin)

by greenway

Returning values from a void function

I am trying to return the values avgTime and avgGross from the void functions but have not been able to find anything that works. Typically, I would just put th...

[7 replies] Last: void readFile() - read the contents of the input file Your calcAvgGr... (by dhayden)

by jkwok678

Deleting 1 copy of a shared_Ptr

Hi,how could I set a shared_Ptr to nullptr? Concourse has a std::shared_ptr<Text> called text. It also has a setter and getter. This currently doesn't work. Th...

[9 replies] Last: > I think that may just be a mistake with the const. that's quite a de... (by ne555)

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