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Beginners - September 2017 (Page 13)

Trouble with bubble sort and pointers

In the code below, everything I've done is working as expected, except for the function named selectionSort. With that function, it is my intent to use pointe...

[6 replies] Last: however, that's not bubble sort. for (j = i + 1; j <= end; j++) {... (by ne555)

by CapitalJeep

Why does this loop? (probably stupid simple--but I cant think it through)

Writing a program that simply converts time. Have the program written and it compiles just fine--however... When the program asks for the user to enter the h...

[2 replies] Last: Andy, Thank you! Sometimes I just have to shake my head at myself (... (by CapitalJeep)

by Mehari belay

linked lists

need for more explanation about linked lists and how they work? thanks!

[2 replies] Last: You might find Section 3 of this to be useful too: https://www3.ntu.ed... (by closed account 48T7M4Gy)

by zeviah5

3x3 complex matrix (1,2)

I am new to C++. I am trying to read a 3x3 matrix from a file then needs to find eigenvalues and eigenvectors manually. My file is not opening. I am not sure of...

[33 replies] Last: @zeviah5 The methods I used are for dense matrices. If you have matri... (by lastchance)

by Icyblizz

Exercise Explication

Hello guys, Exercise: Implement a sort function that takes a vector of pointers to an interface class, Comparable , that defines a method, compare(Compara...

[2 replies] Last: Thank you for making the definition of interface in C++ clear to me.... (by Icyblizz)

by sezo

need help with output on assignment

Object oriented C++ course. Still learning the ways. This is the assignment http://venus.cs.qc.edu/~waxman/211/Score%20the%20race%20211.pdf I am having trouble...

[9 replies] Last: @sezo I had to add a little more to your program, but it works now. ... (by whitenite1)

by closed account 9EU9z8AR

Help make this better!

Hello, this is a simple Roman Numeral Converter It works too! However, it displays weird numbers if you enter anything below 0. I have also made some mistake...

[2 replies] Last: also did you mean move main to the top of the program? yes, you can do... (by jonnin)

by bluefrog

vector size() argument ?

I tried doing this earlier: void ftnode_client::fetch(std::size_t start=0, std::size_t end=v_result.size() ) { for (const auto & s : make_range(v_result, s...

[4 replies] Last: got it working i understand the theory of templates, but struggle wit... (by bluefrog)

by CameronStevenson

Question about classes with other classes as member data.

I am currently trying to make my way through this book "Sam's Teach Yourself C++ in 24 hrs" and am confused about a certain example program. The program is supp...

[8 replies] Last: Ah I see, I think understand these setter functions now. I think this ... (by CameronStevenson)

by MulStudent

URGENT ! Need help with my assignment. need to pass up in 8 hours pls pls help

Write a C program that displays menu as shown below: Menu 1. Calculate Grade 2. Multplicaion Table 3. Print Pyramid 4. Exit Enter your...

[19 replies] Last: Wait. This is C++ program rather than C. also it uses c++11 features. ... (by codehelper)

by boere1337

variable vector sequence

I’ve started to learn C++ a couple of weeks ago and it’s been going quite smooth. Right now I’m trying to figure out how to make a vector (got that down),...

[2 replies] Last: std::cin >> iterations std::vector <int> sequence(iterations); ... (by ne555)

by Kappa

Calling a value from a class to a different class

So as the title says, is there a way to call a value of a class user defined function to another class user defined funtion?... for my code below i would like t...

[2 replies] Last: Forgot to reply.. thanks keskiverto!! i actually got it! (by Kappa)

by MrMou6

double variable

Hello, how I can do that double variable shows only 2 numbers after dot let say: 20.00 not: 20.00000 by the way im using sfml engine :D code: double money =...

[2 replies] Last: side note but money is often an integer and often 1 is the smallest cu... (by jonnin)

by von1997

Attempt at bubble sorting

trying to sort through an array and find the largest stored value. void findHighestGrade(Student students , int n){ bool issorted=false; doubl...

[2 replies] Last: How many times do you increment j between lines 17 and 20? (by lastchance)

by andreigabriel

Generating and Sorting numbers.

Hello. How can I generate 1 million random numbers and sort them in c++.Can I use a vector to sort the numbers?

[10 replies] Last: Sometimes, you just want some numbers, and that is all you need. ht... (by closed account 48T7M4Gy)

by GSid

isdigit in a simple for loop

Hey I am trying to create a program that uses isdigit in a for loop to make sure the input is a digit but when i input 12av34 all i get at port b is 12 please ...

[7 replies] Last: This do you? The previous one is simpler. #include <iostream> #includ... (by lastchance)

by HDD Purple Heart

Question about Exception.

I'm trying to make an exception here to limit 9 characters and the program errors. Am i doing something wrong? cout << "PC " << i+1 << endl; ...

[2 replies] Last: > Am i doing something wrong? Yes; using exceptions for control flow.... (by JLBorges)

by phongvants123

help me...i'm beginner

why does it say "both ID and PASSWORD are WRONG " eventhough i write id=1,password=2....i thought it just need to say "id is correct"...help #include<iostrea...

[2 replies] Last: i got it now...appreciate that....good man :) (by phongvants123)

by Bronislaw

Reading txt file into 3d vector

Hi people, is it possible to read a txt file with 3 different delimiters (,;#) into a 3d vector of x,y values ("sf::vector2f")? The lines of the txt file have...

[3 replies] Last: another approach might be to: (a) read file line-by-line into std::str... (by gunnerfunner)

by MrMongoose

I need to write a Program for My Programming class but I am stuck

The Program is supposed to repeatedly prompt the user for the three coefficients values,a,b and c, and will then evaluate the expression below and display the t...

[3 replies] Last: My professor wants us to only use ints or floats in this project as t... (by mbozzi)

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