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Beginners - September 2020 (Page 5)

Function Calculator. Help will be appreciated

Write your question here. I am new to c++ and as an assignment we were tasked with making a simple calculator using the function statement. I keep receiving th...

[5 replies] Last: Ah sorry if I haven't responded to any of your replies. I'm still lear... (by AeroRaven)

by momof4

How does a vector resize work?

I'm trying to recreate the standard vector class, but I'm having a hard time figuring out how the vector does its resize. How do I allocate more memory after I'...

[8 replies] Last: Just look at the source code of std::vector The problem is that when... (by dhayden)

by annolliwohe

Execute the function on the entire character string (1,2)

Hello I have a function to detect comma numbers in a string and convert them to a double variable but I can't make it recursive for all the numbers present? how...

[30 replies] Last: I thank this forum without which I would have spent more time to under... (by annolliwohe)

by Deadweight77

Sieve Of Eratosthenes C++ Using Set Help

As suggested in the title, I need some help with my Sieve of Eratosthenes program to remove multiples of prime numbers. I figured that line 16 would help me the...

[10 replies] Last: Here is a version using the set exclusively: #include <iostream> #inc... (by dhayden)

by Mif

Help with for loop

Hi.. I have this code which delete a specific line from a file and it's working but before asking the user to delete a line I choose to print the content of ...

[17 replies] Last: For an alternative to fgets(), consider: #include <stdio.h> int fg... (by seeplus)

by DonnaPin

member functions and inline

Hello, I am learning about inline functions and I was hoping someone could clarify something for me. The book I am learning from says that all functions declare...

[3 replies] Last: If the member function is declared inside the class and then defined l... (by dhayden)

by cole274

Name Format Assignment Trouble

In this assignment were supposed to take the first middle and last name that are input and format them a certain way. For example Pat Silly Doe would format to ...

[10 replies] Last: Ideally, you should account for names that are just one word, or sever... (by dhayden)

by nakash

anagram c++

im trying to make a anagram finder. where it request the user of a word and searches the vector words to find all the anagrams of that word. i think my logic be...

[12 replies] Last: No problem. I thought I might have missed something that caused duplic... (by dhayden)

by GreggoryLewis

Problem with dynamic array of structs using pointers

Hello, I am in a class where I have to receive values from a file (a string, an int, a dynamic array of floats, and a dynamic array of strings). I have to setup...

[4 replies] Last: Thank you all for the reply. So some of you asked what the input code ... (by GreggoryLewis)

by albertBcn92

Linking my static library

Hi, I have written a C++ library as a beginner project. I have created a Makefile with the instructions to compile the code as a static library (make static) an...

[4 replies] Last: Okay I found the problem. I had never built a static library with C++.... (by albertBcn92)

by levilone

damage algorithm for simple game

I'm having issues calculating damage from a small game I wrote. Every time the player or enemy attack, the damage gets reset so no one ever dies. The problem is...

[13 replies] Last: That's clever. I find that while tutorials are nice, they don't seem t... (by levilone)

by Volapiik

c++ issue with using commandline inputs in a forked execvp

When running the code below I get an incorrect output. I am fairly sure I am doing something wrong with the execvp call as I have tried changing everything and ...

[6 replies] Last: ne555 yeah -ls -l is a typo that I thought I removed all instances of,... (by Volapiik)

by Vendetto

Checking to see if a Folder Exist

I am writing a little program to do some functions on some PC our company sells. The PC have a security feature that locks them down to prevent tampering. How...

[3 replies] Last: coder777 if I remove the last backslash at the end of the path the who... (by Vendetto)

by LakySimi1

Multithread - Finish one 'for' interation before continuing?

Hi everyone, i'm making my own raycasting engine and it's well functioning, sprite, ai and everything else. In order to raise the framerate i've discovered the...

[4 replies] Last: Yes, i intend a vertical scan line, it can go up to 60fps in 480x300 o... (by LakySimi1)

by louiGBC123

Compute the average of weighted exams.

I need help on my CSCI-40 assignment. Here is what is asked of me: Suppose a teacher weights the four exams he gives 10%, 25%, 30%, and 35%. Write a progra...

[1 reply] : For weighted average, don't code it until you know how to do it by han... (by lastchance)

by kerbealbor

Infinity comes up as an undesired output

Hello, I am supposed to make a program in c++ that takes user inputs of goals and the shots a person in made in soccer, and then use this information to come up...

[4 replies] Last: while (cout << "Enter the number of goals that were scored: " && (st... (by seeplus)

by levilone

Writing a simple game, having issues with objects

So I'm trying to make a simple turn based game in terminal. I have a header file, and two cpp files. The idea is to make the game highly expandable as a learnin...

[5 replies] Last: The if statement only applies to the theplayer.number(). It doesn't ap... (by seeplus)

by Joello

Reading many lines and separating by spaces on each line

Hey guys so i think all of my code is working except for reading my text file input. The text files will always be formatted with two names on a line, first and...

[6 replies] Last: > getline(linestream, data, '\t'); you never mentioned a tab in the ... (by ne555)

by The Emortal

Defining Iterators

I've been working my way through C++ primer and I've been experimenting on my own tinkering with some of the code in the book. It presents this code for a binar...

[6 replies] Last: boom! (by seeplus)

by Shruthi LS

Function pointers

Hi all, There are two functions where in I have use function Validate as a pointer to the PrintNum function. How to use the function pointers. int...

[2 replies] Last: Raw function pointers are very C-ish. See also: https://www.cplusplus... (by salem c)

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