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Beginners - March 2018 (Page 12)

by Cp9

How I can check if credit card numbers contains only of numbers? # include <iostream> # include <string> # include <iomanip> using namespace std; ...

[2 replies] Last: if ( creditCard.find_first_not_of( "0123456789" ) == string::npos ) c... (by lastchance)

by knguyen2081

How to access the last character in an element of string array

I am provided with a coded message, a definition list, and asked to write a program to translate the message. And the definition list looks like this: A =...

[2 replies] Last: Sorry about that. Here's the code. It's pseudocode though because I do... (by knguyen2081)

by nicholasjb1996

How to replace NaN values in text file? (1,2)

I'm fairly new to C++ programming and I am working on my first project. The current issue I am facing right now is that after I read in my file, the data in the...

[22 replies] Last: The following is in order of columns: Square ID(GRID ID), Time Interva... (by nicholasjb1996)

by d1g1talarts

Square root

i need help finding square roots without the math library. what im using is this //square=total length of 1d array void uMatrix::sqrt(int square) { ...

[1 reply] : root = ((root + square) / root) / 2; Slightly wrong. The Babylonian... (by Ganado)

by zapshe

std::cin and whitespace - not consistent?

Alright, I've been having a weird experience with std::cin - hope someone can clarify things for me. std::cin doesn't accept white space as part of the input. H...

[5 replies] Last: Thanks Peter, that looks pretty handy, I'll make sure to remember it f... (by zapshe)

by ghost1111

question about maps

i have a question about maps, im working on a spell check i have load dictionary which is going to be a set, and i have that correct, but for the map part im co...

[1 reply] : I'm not sure if a map would be the best option for a spell-checker, I'... (by Ganado)

by Graff527

Trouble using an input facilitator function to read a list with tabs.

Working on a small ungraded assignment for my class and have stumbled upon a problem. We are suppose to be using a facilitator input function (see below) to rea...

[4 replies] Last: If a string contains space you need to use getline with '\t' as delim... (by Graff527)

by Databend

Mail Order type application

I'm trying to do an application that allows the user to enter a 4-5 character string consisting of a number, two letters that determine the output, and then 1 o...

[6 replies] Last: So I should be using ==? (by Databend)

by king2105

what excactly are atrributes in a class?

so we got a assignment from school and we have to create a class but I don't quite understand what they mean with attributes. [ #include <iostream> class F...

[1 reply] : Hello king2105, PLEASE ALWAYS USE CODE TAGS (the <> formatting button... (by Handy Andy)

by pevecg

Setting value to dynamic class object

Hello, so I am playing around with classes and I pretty much understand them apart from the fact how do you set a value to dynamic class object. void Account...

[1 reply] : Nevermind, I realized that when testing this, I didnt initialize the a... (by pevecg)

by pizza

Why Pass String By Reference

Hello. I learned that when you pass something by reference not by value, the program doesn't make another extra copy which makes my program efficient and, whate...

[12 replies] Last: Even without threads, the function may not be able to assume that the ... (by helios)

by Databend

Verifying correct input

I'm creating a program that requires the input to contain a certain parameter, that being 3 digits followed by a hyphen, and then two more digits. I cannot find...

[2 replies] Last: Thanks! Works perfectly. (by Databend)

by Fojaxx

Prevent characters from being entered into int variable type

Hey, so i spent all yesterday working on a ratio calculator for purchasing items. the program takes a given budget limit, takes a number of inputs (1-10) rep...

[8 replies] Last: In most cases, the best (simplest, most straight-forward) way to valid... (by mbozzi)

by d1g1talarts

Visual Studios c++ Square Matricies

i am having trouble creating a square matrix with my code. I am not allowed to use the vector library or the math library. I am restricted to iostream and fstre...

[3 replies] Last: Your question is not entirely clear. On one hand you talk about some ... (by keskiverto)

by king2105

what excactly are atrributes in a class?

I have been googling for 2 hours and I still don't know what an attribute is in a Class. could someone give me an example? I am familiar with other aspect...

[1 reply] : https://stackoverflow.com/questions/18282330/c-is-it-correct-to-call-c... (by d1g1talarts)

by fivestar

Vector loops

Im not sure why vector d is only getting the "dog" string and not the "catd" string as well. /**********************************************************...

[5 replies] Last: std::string::npos http://en.cppreference.com/w/cpp/string/basic_string... (by closed account E0p9LyTq)

by poohbear

functions and array

my codes not working #include <iostream> #include <string> #include <iomanip> using namespace std; // Function Prototypes // These prototypes alrea...

[1 reply] : not working Please describe that in more detail. * Fails to compile?... (by keskiverto)

by urby

Why does the output value always equal 1?

Hello, I am sorry for a basic question, however, I can not figure out why this function obtains the value of 1 for n. Here is the function: int a = 0; in...

[6 replies] Last: Thank you for finally showing the relevant code. A compiler says: I... (by keskiverto)

by dannehess

Count the average from an external textfile. (containing strings)

Hey, Im trying to make a program with an external .txt file. It should contain First name, last name and the age of the persons. Then get the info from the .tx...

[8 replies] Last: Thank you! you´re the best! I have to study more.. (by dannehess)

by mikaylaelena

How to use to_string function

I am creating a function that takes two integers and adds them returning as the string "a + b = c". I have to use the to_string function and it only seems to re...

[1 reply] : #include <iostream> #include <string> std::string addition( int a, ... (by JLBorges)

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