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Beginners - June 2018 (Page 11)

After I put in the radius when I run it, the area and perimeter don't show up. Could someone give me an idea? #include <iostream> using namespace std; in...

[2 replies] Last: thanks (by grider67)

by cnmthmd

c++ type erasure

Hello I have problem in my school work I try to pass in the "Board board" and the Color color to the the Move PlayeMove(const Board& board, Colour c) function,...

[3 replies] Last: Typically, the solution would be to introduce straightforward run-time... (by mbozzi)

by grider67

Area and perimeter of a retangle

When I run it, I can input length and width. It's not outputting the area and perimeter. What am I missing? #include<iostream> using namespace std;...

[2 replies] Last: Thanks for the help (by grider67)

by t009

Why use while(true)?

Is there an alternative to using a while(true) loop and why is it useful here? Could (t.kind=='*'||'/') be used instead? instead of this "while(true)" whi...

[6 replies] Last: Ok I understand now. I just didn't understand. I saw that a return in... (by t009)

by grider67

Circumference, area, radius of a circle

Trying to remove the declaration of RADIUS. Need to add a variable declaration inside main() for a variable named radius. Initialize radius to 5.0. Does th...

[1 reply] : yes. looks like int main() { ... double radius = 5.0; ... (by jonnin)

by One Pea

Finding 2 Largest Numbers in Array

This code doesn't find the 2 largest numbers, instead returns 2 numbers in the millions range, not sure why? #include <iostream> #include <vector> usi...

[6 replies] Last: OK, split them in pairs as you are doing (or would be once you fix you... (by lastchance)

by soccer53

Help with creating hotel bill

I am trying to create a code that will create a hotel bill. The program shall prompt the user for some numerical values, read in those values, include those val...

[3 replies] Last: If I were to do it I'd use the Boost Date_Time libraries https://www.b... (by closed account E0p9LyTq)

by H00G0

Question on the limits include. What does this statement mean?

inventoryDataFile.ignore(numeric_limits<streamsize>::max(), '\n'); inventoryDataFile is an fstream object. Can you explain to me in detail what this...

[5 replies] Last: Thanks a lot to you two! This made things much cleared even if it wasn... (by H00G0)

by Drauka

Codeblocks global compiler settings

Hello All, I am new to the forum and have a question about an article http://www.cplusplus.com/doc/tutorial/introduction/codeblocks/ Under that link is a ...

[3 replies] Last: @Drauka, One thing to understand about the tutorial here at cplusplus... (by closed account E0p9LyTq)

by ETH11674

reconstruct a vector to user defined class

Hello everyone If we have two normal distribution n1(2, 1) , n2(3, 1) and add this two as result we derive N(5, 2). but if we take samples of n1 and n2 CD...

[5 replies] Last: > compare the moments how to find the mean(first moment) and variance(... (by ETH11674)

by Trezkez

c - displaying X made out of 1s with a matrix

Ok, so I want to print an 8x8 X made of 1s with a matrix. The output should look like this for example: 1--------1 --1----1 -----1 --1----1 1--------1 Though,...

[10 replies] Last: Ah, I completely missed the odd-width cases, but the bitwise-or'ing is... (by lastchance)

by jamos

Saving Game Function

Hello, I'm trying to implement a save and load game feature for my 2 player 10x10 grid text based Battleships game. Tried scouring around the internet and...

[7 replies] Last: How does the save function actually get triggered That's up to you. ... (by tpb)

by Tsplinter

Hi. New to C++ and using youtube tutorials

Hi. I'm hoping I can find some help here. So... I'm watching this youtube channel, "Trevor Payne, Let's Learn C++", episode 4 of basics: https://youtu.be/5u6Oq...

[16 replies] Last: there are tutorials right here at cplusplus, not updated to C++14/17: ... (by closed account E0p9LyTq)

by lkordich

Printing prime numbers between 3 and user input

Trying to make the program ask a user for a number and then the program is to print out all he prime numbers between 3 and the input number. This is printing bu...

[3 replies] Last: Thank you for the input. I managed to get it done by using a code I fo... (by lkordich)

by smaeder

Help needed regarding class files

So, I am the first to admit, I do not know how to word this that it may make sense to a seasoned C++ programmer. But I will do my best. I am trying to make a ...

[11 replies] Last: Thank everyone who helped with this very much. I had tried some of th... (by smaeder)

by kik1116

C++ Store Object to index from an Array

Hello, can you help me with this question. A store () method gets an object, calculates an index for the array using getKey () modulo size, and stores the obje...

[8 replies] Last: 1) Please use code tags when posting code, to make it readable. 2) ... (by MikeyBoy)

by gdz98

Jumping into C++ cha 17 number 4 (binary trees and checking)

Hi guys I m going trough the Jumping into C++ book and im currently "still" (for who knows me xD) on the binary tree chapter. There s an exercise that tells me ...

[2 replies] Last: no it isn't sorry.... I wrote and "sorting" but that was from another ... (by gdz98)

by gdz98

Jumping into C++ cha 17 number 3 (binary tree and checking balance)

Hi guys, i'm still going through the binary tree chapter of my book, and in this exercise i' m supposed to create binary tree of nodes and give the user the pos...

[7 replies] Last: You're welcome - glad I could help! (by MikeyBoy)

by gdz98

Jumping into C++ cha 17 number 2 (binary tree and counting nodes)

I m in the middle of this exercise of Jumping into C++. The chapter is about binary trees and I have to build a program that let the user insert as many values ...

[3 replies] Last: oh. it crashes becase if (!tree) { node* new_tree = ne... (by jonnin)

by CGunn86

Counting/returning number of files in a folder?

The only help I've found online so far to achieve this (storing the number of files in a given folder) is by using the Boost library. I'd rather not include any...

[4 replies] Last: you can ask the OS via 'system' calls using ls or dir (unix, windows) ... (by jonnin)

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