Beginners - C++ Forum - February 2012 (Page 37)

My homework is to create a computer program that calculates and outputs the inverse of the 2x2 matrix (-2 -5) (1 3) I wrote this, but it didn't work. I p...

[8 replies] Last: Thank you so much. I finally got it. The table we learned would probab... (by Fraidy Levilev)

by jaff

Function returning multiple dynamic arrays

Hello everyone, A function in my program should return two arrays and a number. The problem is that the two arrays are dynamic - I cannot pre-define their si...

[3 replies] Last: Ah yes, makes sense now! I was trying it the other way around: I was u... (by jaff)

by NerdTastic

Cstrings and strcat?

Hello all. I'm trying to use the strcat function with cstrings, but it wants me to use char*'s. This would be fine, except I'm using MFC and have declared cstri...

[3 replies] Last: Well, I feel dumb now. Thank you guys! (by NerdTastic)

by edmundus

segmentation fault in linux

Hello, I wrote a program to evaluate some files. Compiled and run in windows-cmd it worked perfectly, but now I am trying to use it in Ubuntu 10.04 and am gett...

[3 replies] Last: Linux is case sensitive. Also make sure they have read and write permi... (by wolfgang)

by TheFool

How is it 2? (Modulus Question)

So I ran the following code in my compiler: int k = 24 / 9 % 5; cout << k << endl; The output is 2. But I don't understand how it can be 2. No matter what ord...

[2 replies] Last: Modulus gives you the remainder of an integer operation where divide g... (by wolfgang)

by Baso

Programmer and mathematics

As a programmer ( games programmer ) What should I know about mathematics? If you suggest books, that would be great. Thanks

[2 replies] Last: They fall under the Physics band, but I would added differentiation an... (by MrHutch)

by yhangel

creating unnecessary newline

print() { cout<<"\n "; cout<<"Item Description Qty Unit Price Amount\n"; cout<<" "<<pn <<" "<<qty<<" "<<up; return 0; } why is it af...

[3 replies] Last: i have solve it my self,, unknowingly,, i put a "\n" (refer to newline... (by yhangel)

by Caprico

if and for condition statements

Okay, so I was solving one of the Euler problems, and I came across a rather peculiar doubt... Till now, I had thought that: for (i=1; i<=max; i++) if (s...

[2 replies] Last: Ooooh, now I get it.. So in the for loop, when the condition evaluates... (by Caprico)

by Bigjosh11

im a newb and need help

So i am trying to Write an application that asks a user to type A,B,C, or Q to quit. When the user types Q the program ends. When the user types A, B , or C, t...

[2 replies] Last: I would suggest only using 1 loop. The logic goes something like: g... (by cire)

by shangy

I need assistance with Voting Poll Program

Suppose a new member of the city council has to be chosen from three candidates and suppose there are 4 voting stations. We need a C++ program that will count ...

[no replies]

by HomesickAlien

SFML problem

Hi all, I have some trouble to get SFML working. I am using the Code::Blocks IDE. Tried the following: 1. unzipped SFML-1.6 into c:\SFML-1.6 2. In Cod...

[2 replies] Last: Thanks for the reply. Meanwhile I've found a nice tutorial on youtube.... (by HomesickAlien)

by atjm88

what is ||?

Hi, may I know what is || inside this program? Is it means "or"? If yes, how to write for "and"? (mark<0 & mark>100) or (mark<0 && mark>100) ? or both are ...

[11 replies] Last: Hi, wolfgang, ur code direct give output as -1 as soon as I run it bec... (by atjm88)

by mishonacro

is it possible to write this shortly?

#include <iostream> #include <algorithm> #include <vector> #include <fstream> using namespace std; int biggest(vector<int>); int index(vector<int>); cons...

[7 replies] Last: Great! thanks a lot. (by mishonacro)

by jalfor

Pointers To Objects

Just a quick, simple question...why doesn't this work. I can't work it out. #include <iostream> using namespace std; class stuff { public: ch...

[5 replies] Last: It works! Thanks a bunch, though I had to get rid of the dereference o... (by jalfor)

by TruYadoo

If, Else If and Else

int main() { int r; int Yes; int No; cout << "Are you alive? "; cin >> r; if (r = 'Yes') { cout << "Yes." << endl; } ...

[3 replies] Last: Thank you Moschops. Everything is working now. (by TruYadoo)

by Trashcan42

Problem with functions and triangle sides

I'm trying to make a function that assigns numbers to types of triangles when given 3 numbers. Ex: 3=equilateral, 2=isosceles, etc. But when I'm trying to call ...

[1 reply] : Your code doesn't compile because the function triangle_kind doesn't r... (by cire)

by WhiteWind

Is pre-defining lots of objects inefficient?

I understand that using global variables is a bad idea, because that variable is taking up memory space the entire time the program is running even though it's ...

[2 replies] Last: Using global variables is generally considered a bad idea because thos... (by cire)

by MatthewRock

In console: how to make part of console window not moveable?

Hello, I want to test my programming skills(and also learn few things), so I decided to create text-based Role-playing game in c++. Here's how I'd like it to ...

[7 replies] Last: I disagree. I don't see any reason he can't do both at once. (by Duthomhas)

by Sgtkumar

MAC jGrasp Running Problem.. Please Help

I just installed jGrasp on my macbook pro running OS X v10.6.8 and tried to compile and run a simple code i was assigned in class. #include <iostream> usi...

[1 reply] : Turn on "Settings" / "Verbose Messages" and see if you get any additio... (by lbarowski)

by helpmeimnewb

What is an example of entry level coding? What would you work with on a job?

So I am sort of familiar with for, do-while loops, operators, variables, declaring variables, switch statements and a few other small things. There is an ope...

[no replies]

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Beginners - February 2012 (Page 37)