Beginners - C++ Forum - February 2009 (Page 5)

hi! I need to compute eigenvalues of an nxn matrix. I know lot about the existing numerical algorithms, but i was hoping for a library that already implement...

[1 reply] : In STL there is no library for matrix operations. I think that you can... (by maros522)

by pinkbyfloyd

trying to make binary stream object

Here part of the code #include <iostream> #include <fstream> using namespace std; int main() { char filename ; int n; int age; int...

[2 replies] Last: I am able to open a file successfullyy with you code. What issue are y... (by elpis)

by ahhhxtc

C program that counts words,characters,lines.

Hi there i need a program to count words, lines, characters. I have the character and line count down but the word count is off can some one ple...

[1 reply] : if (ch == '\n') {line ++;word++;} (by Welzevul)

by jimmbow

Reading from an input file to get a single line

Alright, so basicly my assignment is number 11 here : http://books.google.com/books?id=HtgSvljvC7IC&pg=PA165&lpg=PA165&dq=Ch3_Ex6data.txt&source=bl&ots=SZZy...

[2 replies] Last: how would I do that? (by jimmbow)

by tjinx

Find Largest and Smallest

My problem is to ask the user to input numbers, 0 being the number that quits the program. If they input another number, it just continues asking them for a num...

[3 replies] Last: I would suggest something like #include <iostream> using namespac... (by open source)

by Espresso

Random function

Hi everyone! I need a random integer, but this integer must be lower than the number 10. In this example it gives any random integer: n = rand(); ...

[3 replies] Last: If you want a "random" number, you should seed off of the time. #i... (by belkdaddy)

by pbcrazy

ASCII Character code advancement, in a char array

Well, i've been trying to right a little program, that will go through all of the characters in a string (or in this case a char array) and advance their ASCII ...

[6 replies] Last: if i have an array of characters, but only the first 15 or so are use... (by helios)

by Xyzk

Graphs search algorithms

Well to cut the story short, I`ve been (for some time now) trying to learn all most useful algorithms and how to use them. Unfortunately, our great hero was hel...

[no replies]

by Ganellon

Grey Wolf boxes

After reading the forums here, I saw Grey Wolf use boxes to represent memory with strings, and I thought it was pretty effective. It got my attention, anyway. S...

[2 replies] Last: Probably not, but can you elaborate? (by Ganellon)

by littleimps

Record Type:

#include <iostream> #include <string> #include <math.h> #include <iomanip> using namespace std; struct purchaseType { string invoiceID; double ...

[14 replies] Last: & = reference = the argument becomes the variable you are passing * =... (by Bazzy)

by AlwaysLearning

What is the best way to maintain commonly called variables?

Lets say there is a class member Z. Z is called several times per iteration of the program. It is never modified outside of its class. How do pros and commer...

[5 replies] Last: Although there are times that data members should be public, making th... (by seymore15074)

by Peyton

Converter program

Hi there, The following program is a kW to horsepower converter. The problem I am having is that after choosing option 1, inputting 8 values and obtaining th...

[3 replies] Last: Thanks! :) (by Peyton)

by Beginner101

Two Questions on Exception Handling

Software: Dev C++ Problem 1(Line 8): This example is to show we can use exception (and its derived class) to create exception objects that will be thrown by t...

[4 replies] Last: Thank you. kbw, Grey Wolf. I use logic_error and the problem is solved... (by Beginner101)

by TheJMan

IGNORE: Loops

Hi guys. Just wondering if there is any way of getting loops like 'if' and 'while' to repeat themselves when they are contained within a 'for' loop. I have foun...

[4 replies] Last: Without seeing code it is hard to say for certain but it sounds like y... (by closed account z05DSL3A)

by StakFallT

Issue with GetLine and Large files?

Is there a known issue (or perhaps, inadvertently by design) with using GetLine with large files? I'm writing my own platform-independant graphics engine. I wro...

[5 replies] Last: Yeah I definately plan to; the engine, so far, leaks like a stab victi... (by StakFallT)

by TheJMan

|| (OR) Substitution?

Hi guys. First post. I'm trying to create a loop where the condition could be one of a number of different values. I have already found out that the operator ||...

[3 replies] Last: Thanks very much guys :) (by TheJMan)

by vexstorm

istream and ostream??

I am working on a program for class and the algorithm provided by the teacher says we have a function string ReadMedia (istream &input); now.. how exactly do...

[1 reply] : You can use it exactly as if it was any other istream eg: if you ... (by Bazzy)

by pinkbyfloyd

c++ without fear binary write sample program problem

Hey all, "Someone with the c++ without fear book" help. I am trying to run the binary file write and read sample programs that are included in the book on...

[2 replies] Last: It is the code sample that is in the book. (by pinkbyfloyd)

by Sain

finding factors

#include <stdio.h> int main() { int number; int sum = 0; int product = 1; int factor; int counter = 0; printf("Enter an ...

[1 reply] : You could use a simple for-loop and the '%' operator: if a is a fact... (by Scipio)

by matanuragi

what is reusability

which feature is available in c++ to support reusability.

[1 reply] : Classes and functions. (by Return 0)

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Beginners - February 2009 (Page 5)