Beginners - C++ Forum

new operator and class-type instance members

Hi, I have a simple question about using the new operator on classes with instance members of other class types. If I have a class foo with the following def...

[1 reply] : Your first example is right; your second is a memory leak. And yes,... (by jsmith)

by doppelgangland

How many years do you need to learn C++? (1,2)

Just so I have an estimate, how many years has taken you guys to get a good understanding of C++? If you work and can only devote a couple hours a day to le...

[22 replies] Last: When do you regard "learning C++" as finished? Cause if it's just the ... (by hanst99)

by CarleneGriffiths

Syntax Errors and Formatting

Hi All I need some help with this code. I need to fix some syntax errors and am having trouble. Here is the code i started out with: #include <iostream>...

[2 replies] Last: int main (by Bazzy)

by j85thday

C2659: '=' : function as left operand

Hi guys, I'm new to coding, I'm doing a course. What I want to do is add keyboard support to the police car, there's support for the van I'm using as a templat...

[no replies]

by manchester

Question about function

I wrote this program but im actually suppose to write it as a function..But im having a lot of trouble writing it as a function... Can someone please explain ho...

[6 replies] Last: Gee... I do know that feeling. Seriously, though, m4ster r0shi's ... (by Albatross)

by closed account jLNv0pDG

fstream issue...

#include <iostream> #include <fstream> using namespace std; int main() { fstream myfile; myfile.open ("test.txt"); if (myfile.is_open()) { cou...

[1 reply] : If you want to use the file for output and you want to create the file... (by m4ster r0shi)

by Nelo87

copy a string (with spaces) to char array

I'm having trouble copying a string with spaces to a char array. If the string does not contain spaces everything works fine (see below): My input was: "h...

[3 replies] Last: Thank you. I need this because I'm trying to make a program that ev... (by Nelo87)

by jbl09

question about this loop:

first loop iterates through data by the day of an input file: outputs to a diff file second loop iterates through the trucks in input file:also outputs answer...

[6 replies] Last: i realize what my mistake was and i appreciate all the input thank y... (by jbl09)

by cyeb

Sum of Digits in an Integer

(Before you yell as best as you can through the 'net, yes, I CAN use the "Search" button.) I've found this page: http://www.cplusplus.com/forum/beginner/498...

[4 replies] Last: Thanks, solved! Both great explanations. =) (by cyeb)

by whiterose

new and delete operator

how to write a programme by using new and delete operator to display the ouput: How many numbers would you like to type? 5 Enter number: 75 Enter number: 4...

[3 replies] Last: It's interesting that that sample output is identical to one from the ... (by Bazzy)

by manchester

What am I doing wrong...

#include <iostream> #include <cmath> using namespace std; int main() { int length; int width; int depth; int total; total = length * width ...

[1 reply] : You calculate total before you allow the user to enter values for leng... (by m4ster r0shi)

by solomeros

combining two int's

Hi, i have a problem with C.I need to combine two int's... example: if the int's are 1 and 5, i need to combine them into 15(fifteen).Help,please.Sorry for the ...

[2 replies] Last: 10x (by solomeros)

by WahooMan

Question about for loops

Correct the following code to add multiples of 3 between 1 and 100. Will this work? Yes or No. If no, explain why. sum = 0; for (i = 0; i >= 100; i = i+3...

[2 replies] Last: No. It should be something like sum = 0; for (i = 0; i <= 1... (by WahooMan)

by a friend

cin problem

when we use cin>> the(( - ))in the output jump one line down i dont want it.for example i want to cin these by keyboard 1 2 3 4 5 6 4 2 3 what can i...

[2 replies] Last: Double post: http://cplusplus.com/forum/beginner/23092/ (by cnoeval)

by Nikoru

Are there Events in C++?

I recently just finished my Alice programming class (If you want to call it programming :/) and in Alice we did event's. How is an even done in C++?

[1 reply] : Alice... Programming... please don't use the two in the same sentence.... (by packetpirate)

by manchester

Class program

Can someone please help with this assignment.. Im having a lot of problem getting it started, not sure if im over thinking it...I left this assignment till the ...

[no replies]

by ischuldt

empty() vs Null

do I need to say: if (item.empty() || item==NULL){ } or does empty() return true if item is NULL also?

[2 replies] Last: If you are using QString or something like that then there is a diff... (by Duthomhas)

by jinjin12

switch statments :switch quantity not an integer

need some help im writing a class and the constructor for it is: Token::Token(string passedValue) { value = passedValue; switch (passedValue) { c...

[9 replies] Last: did you get this resolved? if so, can you mark it as solved. (by stavros)

by award982

separate a string to separate characters in an aray

Hey all! I have a problem that i cant seem to solve. How can i separate a string into separate characters ? I only need to know how to read a separate charac...

[1 reply] : A string is made out of separate characters here is an example st... (by Bazzy)

by aerowenn

Vector of Vectors size issues

I'm reading in from a file, I have a main vector of class objects that is a vector of vectors 2D in array terminology I guess you'd say. So it has to use a seco...

[no replies]

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Beginners - April 2010