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General C++ Programming - July 2018 (Page 6)

Hello people from CPP. First post. Well, I'm in an awkward situation with my code, because it compiles, but doesn't works properly and doesn't returns any error...

[2 replies] Last: The use of SDL_PollEvent looks fine, if all you want to do is check fo... (by Peter87)

by hassanAman

enum vs #define

How can I use enum like I would use the #define preprocessor macro? For example, with #define, I can do something like : #define STANDARD_RED_COLOR Vector3...

[6 replies] Last: As a variant to @JLBorges, I would prefer to do this: #include <cst... (by gaxio)

by empleat

estimation of time to learn how to make specific program, or hire programmer ?

Hello, i am in chronic pain and i know currently only basics to pointers. I want make a program, to which i put like database of foods and their nutritional i...

[2 replies] Last: the data portion sounds like the kicker. If you have the database or ... (by jonnin)

by LeoMessi

FileReader() -- Error -- Printing last line twice

Hello guys, i need help with this issue, i am trying to read a text file and process it, so i did it, but it read the last line twice and i would like your help...

[4 replies] Last: should i use global variable? No, learn to pass variables to and fro... (by jlb)

by empleat

combinations of variables , ambiguous thing

Hello, lets say i have variables of type int: a = 50 b = 150 c = 100 d = 200 And than i want create another variable, or some other type, lets call it water e....

[1 reply] : I would forget the combinations. put the 4 values into a vector and s... (by jonnin)

by StMick

Incorrect Fibonacci Modulo Results

Im trying to write a program that reads in a Fibonacci number (n) and a modulo number(m) and then returns that Fibonacci numbers modulus (if the numbers are wit...

[2 replies] Last: 1) lookup the golden ratio. After the first few values, you can direc... (by jonnin)

by rbwtp

Can't free memory. Don't know why..

#include <iostream> #include <assert.h> using namespace std; struct node { int data; node *next; }; class LinkedList { node *head; node *tai...

[3 replies] Last: Dynamically allocated memory has no scope and will stay allocated unt... (by MikeyBoy)

by ciuz99best

Room lights

A house has n x m rooms (n, m >= 2) they're represented by a matrix with n rows (from 0 to n-1) and m columns (from 0 to m-1). Every room, expect the first row...

[1 reply] : Duplicate of http://www.cplusplus.com/forum/beginner/239504/ (by MikeyBoy)

by sati53

Could someone explain what is wrong here?

Hello, I have a code that gives wrong output. I have 3 classes, i.e., Material, Elastic and Solver. The Material is a parent class and the Elastic is derived...

[6 replies] Last: Well, I am writing a Finite Element code. So the idea is to create a p... (by sati53)

by Lex33

task Problem set Methode (1,2)

Hi I have problems implementing a method set : I have implemented it in the CCalendarEntry.cpp but getting errors . Please Help: Here are the codes...

[26 replies] Last: Somebody there ? (by Lex33)

by alcatraz98

I dont know why its not working (1,2)

Katya has a sequence of integers a1,a2,…,an and an integer m. She defines a good sequence of integers as a non-empty sequence such that the sums of all i...

[23 replies] Last: @anikdutta10 check this thread: http://www.cplusplus.com/forum/general... (by closed account oG3kizwU)

by rrmestl

LIBC string.find() bug !?

Has anyone encountered the following issue using the string_object.find() method? The method is returning a large address value, larger than even the string_...

[4 replies] Last: yep, that was my issue... sorry to bother all... once i used size_t t... (by rrmestl)

by nikita00

competitive

problem link : https://www.spoj.com/problems/DQUERY/ i applied MO's ALgorithm and i don't know why i am getting TLE please tell what changes i should make ...

[13 replies] Last: the vector not being preallocated. And consider that Ness said about... (by jonnin)

by danielteh

4-digit numbers guessing game - need help

Hi forums, i need someone's help to solve this problem. I am trying to use the random function to generate a four digit numbers and give clues when the user ent...

[3 replies] Last: To All : I have already fixed the problem by using the MOD and intege... (by danielteh)

by kafan1986

Need help with memory leak while multi-threading

There is a memory leak below when the struct is being passed to a thread. Can not understand why, as the code inside the thread if called directly in the main t...

[4 replies] Last: It sounds like pthread_exit() didn't call a destructor. Since you're u... (by tpb)

by closed account i351AqkS

Prime factorisation method for nCr

Can anyone help with the code to calculate nCr by reducing the expression to prime factors?

[1 reply] : What have you tried so far? What expression are you referring to? I ho... (by Ganado)

by LeoMessi

read a text file

hello guys, I am trying to read a text file which contains 5 blocks of 7 lines each, and each lines have different datatypes as follow: *Beginning of text...

[3 replies] Last: Yes, you need to replace std::istringstream with std::ifstream + prope... (by Ganado)

by guninho

I wants to change places in the arrays

http://i.hizliresim.com/1EN2DB.png helpp!! case 2 #include <iostream> #include <iomanip> using namespace std; int main() { cout << "Dizi boyutu: "; ...

[5 replies] Last: Java works differently from C++. But you also need an container to st... (by kbw)

by AndersNorman

Translate key combination to ASCII?

Hi, i have been thinking about how i can translate example (SHIFT + ALT + 2) to @. I been checking google but i can't find anything, i thought getasynckey woul...

[6 replies] Last: You would think there would be. I dunno. None of my big programs com... (by jonnin)

by closed account oG3kizwU

Magic Set - Codechef Problem

Can anyone tell why in the sample input 1 it is given output 0 saying no good subsequences,although we can have subsequence (1,2) whose sum is divisible by 3? ...

[2 replies] Last: You sure have picked some awful, awful, awful names for your variables... (by Repeater)

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