General C++ Programming - C++ Forum

How do I get an output like this using cin.peek? Please enter an expression (like `4 * 5` or `ln 5`): 4 * 5 4 * 5 = 20 Please enter an expression (like `4 *...

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by Dkob1

Error in my program

I keep getting an error for undeclared choice and cin, I don't understand what to do? #include <iostream> using std::cout; using std::endl; int main(...

[6 replies] Last: ok thanks (by Dkob1)

by ryllprous

Symbolic names basic doubt

Hello, I'm learning how to use c++ because I have to work with a code written with it and there's a part of the main.cpp I don't understand. I've looked for it ...

[2 replies] Last: So I don't have to pay much attention to this in order to understand h... (by ryllprous)

by shayanaijaz

Replacing String in Hangman Game

Hi, I'm making a hangman game. All i need to do is after the user guesses the letter correctly it replaces the stars with that letter. I have been trying for t...

[2 replies] Last: I changed the part that i need help with (by shayanaijaz)

by Skhiburdhurs

Problem with User defined functions!

I have a problem converting some of my codes to a function like the adding a value at a queue. this is my original code and it is working fine. And please tell...

[6 replies] Last: Haha! Now I have a bit of understanding of what it is all about. All m... (by Skhiburdhurs)

by Computergeek01

Question About The First Argument In Main()

Does anybody know why the first parameter to "main()" is a signed integer instead of an unsigned or even a short? Is this a left over consideration put in for b...

[3 replies] Last: It's not convention, it's for backwards compatibility. Back before C h... (by LB)

by JasonMcG

Can main() be called recursively?

Can main() be called recursively?

[6 replies] Last: i dont think there is ever a good reason to call main You're right, ... (by MikeyBoy)

by Peter87

Consistent random numbers across implementations

If I seed with the same seed I want the same sequence of numbers no matter if I use GCC, Clang, VC++ or Windows, Linux, Mac. I think this is guaranteed by the s...

[3 replies] Last: Ok. Thanks you for confirming my thoughts. Much appreciated. (by Peter87)

by y12321

problem with reading a string and comparing

Hi! I'm trying to read a string and then compare it to a word. My code: char* cmd = "start"; std::cin >> cmd; if (strcmp (cmd, "eval")) eval (); ...

[4 replies] Last: Well, you do not need strcmp with std::string, you can compare directl... (by MiiNiPaa)

by Chubby

Data Struc

This is this part I have question: Why it didnt calculate the area? What did i wrong? here is output Welcome What is the upper left coordinate do you like to...

[2 replies] Last: You didn't show us any code that handles the inputting of the x and y ... (by doug4)

by quadrangle

using GUI

Am writing a spreadsheet program but I cannot draw line using codeblock. Please I need help.

[4 replies] Last: I do appreciate. Thanks (by quadrangle)

by Leo654321

****Help in operator overloading in classes! *****

SOLVED // overloading operators example #include <iostream> using namespace std; class CVector { public: int x,y; CVector () {}; CVec...

[15 replies] Last: @JLBorges it did add that section: http://en.cppreference.com/book , b... (by Cubbi)

by nikos91able

C++ exercise with virtual functions

My main function is this: int main(int argc, char* argv ) { int l1, n; Ball** ball; l1=atoi(argv ); n=atoi (argv ); for(int i=0; i<n; i++) ...

[3 replies] Last: MikeyBoy 1) I'm new in the forum....I will certainly apply what you ... (by nikos91able)

by jimmytommy

Free Code Browser for C++

Hi, I have source code C and C++ of more than 800MB size. I am facing lot of problem in browsing the code. Please suggest me any of the good reverser engin...

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by xpg94

What to learn next?

I've been learning c++ for about a year now. I went through tutorials on this website and on learncpp dot com. I've done lots of exercises (the most important o...

[8 replies] Last: I would definitely start learning some GUI programming. That seems lik... (by knn9)

by CanOpener

string words into aray

say i have a string called "org_string" org_string = "REFRACTIVE LIGHT"; i also have a string array called keys ; keys has 6 elements(obviously) and right ...

[4 replies] Last: You can use getline. Google "c++ getline delimiter". (by iQChange)

by fbhkhan

Function not storing data in array.

Following function is from a bank account, when new account is created it won't store it in the array or i guess it does but find_acct function wont be able to ...

[2 replies] Last: Is acctnum_array and balance_array large enough to hold num_accts? C-s... (by jmadsen)

by lhoussain

Factory pattern

can you explain me what means this architecture and how i can instanciate my object : classe A { friend class B; friend class C; virtual int function1()=0; v...

[2 replies] Last: but i need to use A functions, and B,C functions too. A *a ; B b =... (by lhoussain)

by ldelsignore

Data Member Refrence Problem

I have created this program with the class Rectangle, and i have gotten most of the errors out I think. However, I am getting these errors, which I do not know ...

[2 replies] Last: The duplicate symbols is because a static member variable needs to be ... (by jmadsen)

by lifeintechnicolorii

Creating a Random Number Generator

Hey guys quick question here, How would I go about creating a random number generator (or pseduorandom I suppose) with user inputted lower and upper bounds a...

[3 replies] Last: Well you are going to have to create a formula then here is something ... (by giblit)

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General C++ Programming - March 2014 (Page 31)