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Beginners - April 2012 (Page 58)

I am creating a program that takes names and stores them in an array along with the grades the students names. i have the whole program wrote but i am having pr...

[1 reply] : You can have a menu at the bottom of your loop that prompts a break co... (by Stewbond)

by Shmoopy

using getline() for objects?

Hello. So I decided to make a new topic since I now know what my problem is. Here's my code: ofstream dataOut; //output stream for the data file ifstream...

[7 replies] Last: > I really don't understand how to write the operator>> function. > O... (by JLBorges)

by georgewashere

Virtual destructor giving me problems );

Hi I'm working on an exercise from a textbook and I am having trouble seeing why I get this error, could someone explain to me the logic behind this? The rel...

[2 replies] Last: That worked, thanks a ton Cubbi! (by georgewashere)

by JCaselles

Tellg() fails with .csv on Windows (in Linux works great)

Hi everybody, I'm creating a program which reads from a csv file and stores each column in an array of structs. Anyway, in Linux with Kdevelop everything works...

[13 replies] Last: thanks coder777! I've checked and, as you pointed out, when using bin... (by JCaselles)

by calvarado777

quicksort alogorithm not sorting :-(

So after many helpful hints I finally am compiling!! However, my quicksort is not working correctly and I don't understand why! The goal is to sort a vector o...

[3 replies] Last: Is it by reference because I move stuff around in the partition funct... (by coder777)

by MatthewE

Got an input, how do I parse only sections of it?

Thanks in advance. I've successfully gotten a text input using the curses library, and successfully comparing it against some other strings. That's cool and all...

[4 replies] Last: A proper parser may be more flexible when dealing with invalid input, ... (by hamsterman)

by ConjugateBeam

Problems with invoking constructor of dynamic allocated array

hello everyone here is my problem that I encountered when programming c++ in SDL, but this problem is just a very simple c++ problem: I have already made a...

[12 replies] Last: I guess now that I think about it it is the same, the only difference ... (by LB)

by Algar32

streams and files question

Write a program system that reads several lines of information from a data file and prints each word of the file on a separate line of an output file followed b...

[17 replies] Last: Try replacing char* line; //to store file name with char line ; ... (by Danishx83)

by Factors

Simple question

What determines the size of a class within an object when that class is being used as the object schematic's/type. Example: #include <iostream> using na...

[8 replies] Last: [quote=Factors]Is it only that? what about function's ?. Member funct... (by closed account zb0S216C)

by mhceotto

using rand() function

I did a couple programs for my c++ class using rand() and by mistake I did not include <ctime>. I got some points taken off and I know it should have included ...

[5 replies] Last: mhceotto, I did a couple programs for my c++ class using rand() and ... (by closed account 1vRz3TCk)

by rocketman

Speeding up qsort usage.

I'm currently using qsort to sort an array of Cable objects. int comparator (const void *elem1, const void *elem2 ) { if((*(Cable**)elem1)->cost < (*(Cab...

[3 replies] Last: Did you turn on optimizations? Never measure performance with optimiza... (by Peter87)

by nikolabebic

FILE STOPPED WORKING!!

Hi guys, I had a problem, I created a C++ file in DEV C++ 4.9.9.2 Beta and it crashed. Ok, this computer is slow so i tryed again. And it crashed AGAIN. And al...

[3 replies] Last: thanx, on my laptop it worked but its batts are dead so i needed on th... (by nikolabebic)

by jpcsasantos

-1.#IND, output for quadratic equation program

Ok guys, i think that the title of the post says everything. My problem is that my program is supposed to solve a quadratic equation but the second zero of the...

[2 replies] Last: OMG you're right! Thank you Works perfectly! TY once again (by jpcsasantos)

by nadir CoCo

Data structure

hi everybody, I have data under matrix form in a text file as follows: <tab> 1 <tab> 2 <tab> 3 <tab> 4 <tab> 5 <tab> 6 <tab> 7 <tab> 1<tab> <tab> F <tab> ...

[10 replies] Last: Thank you, it's getting clearer, I'll reply whenever it's done. (by nadir CoCo)

by Sean Booth

How do you create an array of floats from a string?

I currently have a string of floats that I need to convert into an array of floats, how would I do this? I need to convert this: string Vertices = "0.3 0.5 ...

[3 replies] Last: Thank you, that worked perfectly! (by Sean Booth)

by chenejm

Help with my homework!!!

1. Write a function that receives an integer x as an argument and print x stars in a line. For example, if 5 is passed to the function, ***** will be the ou...

[2 replies] Last: The code I provide below is incomplete but more than enough for you to... (by codingshark)

by student2

Need to make a program that read student names and marks from a file.

The Task The problem is to read student names and marks from a file, grade them and display the details (names and grades) on screen together with the highes...

[5 replies] Last: I have re edit it plz have look n let me knw where i got wrong #incl... (by student2)

by calvarado777

Garbage output with class declaration and Vectors

Hello! I am having two issues with a program I am working on...please help! First problem should be easy but I can't figure it out. Whenever I declare an in...

[7 replies] Last: perfect! thank you!! (by calvarado777)

by kdmpenguin

Letter Frequenices

How come I keep getting a file error? #include <fstream> #include <iostream> using namespace std; int main() { int freq ; // frequencies of le...

[9 replies] Last: thanks, I got this to work for me #include <fstream> #include <iost... (by kdmpenguin)

by dheredhere

Chess piece ranges

Hey guys, I'm writing a chess program and to check whether the functions checkmate and check and true, I will need to find the range of each piece (every sin...

[1 reply] : It will be relatively slow. Assuming you have 16 pieces, and 64 locat... (by personak)

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