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General C++ Programming - January 2015 (Page 6)

Using a class member directly in the header file

Good afternoon, I'm trying to use a class member to initialize the dimension of a matrix. I have two issues. Here is the code (.h) simplified : #inclu...

[1 reply] : Template parameters should be known at compile-time. You cannot choose... (by MiiNiPaa)

by amatthew3

Trying to understand the logic behind creating shapes

I just started doing some object oriented programming and I've run into some trouble with creating shapes out of text. I'm trying to understand the logic behind...

[3 replies] Last: @Tresky are you joking. what do you mean by algorithm. every program f... (by sujitnag)

by vivienneanthony

Calculate steepness or incline from 3 to 4 points (XYZ)

Hello Do anyone have a idea to calculate steepness or incline from 3 to 4 points in a 3D(xyz) point? I'm trying to calculate steepness to determine if i c...

[1 reply] : Hmm. The slope from (0,0,0) to (x,y,z) is z / sqrt(x^2+y^2). To compu... (by dhayden)

by emckai

Compiler & Variable problems

So currently I am having issues with two things at the moment. While working on a program for one of my CS classes I used my macbook to compile and run the p...

[7 replies] Last: The fact that you're getting the right answer on Ubuntu is purely coin... (by dhayden)

by pieroborrelli

Understanding the try-block

Hello, I'm studying C++ by 2 months and I'm having some problem with understanding the try-catch block in C++. I'm using the book : programming principles and p...

[1 reply] : Suppose func1() calls func2() and func2() calls func3(). func3() throw... (by dhayden)

by amatthew3

Logic behind geometric shapes- diamonds

So I've found this piece of code but I'm having a hard time understanding how it works. Could someone please help me to understand this code? I want to make a d...

[no replies]

by beko

Cannot compile with openMP

This is my little program (omp.cpp): #include <iostream> #include <omp.h> int main() { std::cout << "Before" << std::endl; #pragma omp parallel { ...

[13 replies] Last: Alright. Then it's time to practice some openMP for me. Again, thanks ... (by beko)

by vanillarainbow

Enter manually a path in C++

Hi guys, i would like an help about putting manually a path in my code. This is what my code should looks like #include <iostream> #include <fstream> #inclu...

[2 replies] Last: thx a lot for the help :D (by vanillarainbow)

by Crocoduck

Building a matrix with a specific dimension

Hi there, I would like to initialize a N-dimensional matrix by specifying the dimension N. To be clearer : if N=2 I use to do that : std::vector<std::v...

[2 replies] Last: Thank you for your reply. Seems crystal clear. (by Crocoduck)

by Aquarius121989

Find first 10 words and last 10 words of a string array

Hi everyone, I got a homework that require to count number of words in a text file and also display the first and last 10 words of the text file to the console....

[2 replies] Last: Since you're reading words, and words are just groups of characters se... (by tipaye)

by asrebo

identifier before function call

what is the meaning of identifier before function call in this example? i mean that in syntax context // Create a stack-allocated handle scope. Hand...

[2 replies] Last: There are two possibilities: One: isolate is the name of a type Ha... (by JLBorges)

by DrJones

OpenCV - Opening and closing webcam

I feel a bit dumb asking this silly questing. I am trying to switch between 2 states, and the event that determines which state i am in is based on the key i'v...

[7 replies] Last: while(true){ if( cap.isOpened() ){ //avoid reading from an unopene... (by ne555)

by uclakid

Big C++ by Horstmann

Anybody have the link to the solutions of the odd numbered review exercises of Big C++ 2nd edition by Horstmann? His old link (http://www.horstmann.com/bigcpp/...

[1 reply] : Worth mentioning that people on programming forums really don't like j... (by Tresky)

by Belldore

functions messing up!

Im trying to use gotoxy which was removed from conio.h apparently. #include <stdio.h> #include <conio.h> #include <windows.h> void gotoxy( COORD c ) {...

[2 replies] Last: ^^ What he said. (by Tresky)

by gaurav97

program working on online compiler but not on codeblocks

This program works on an online compiler but force closes on codeblocks after entering the elements. Any suggestions what is wrong ? #include<iostream> usin...

[6 replies] Last: if you are looking at the program you are not looking at the compiler.... (by Little Bobby Tables)

by Prabhat Routray

constructor

what is importance of one argument constructor with example?

[2 replies] Last: Student(int rollno=24) I don't think that having a default value par... (by Tresky)

by danishs23

vectors

I'm not sure what i am doing wrong, can someone please let me know. im trying to print the prime numbers, so i put the numbers into the vector and then erase...

[3 replies] Last: Thanks keskiverto and sorry for not reading up before. (by danishs23)

by cppnoob25

program crashes

if (input == '(') // '(' has lowest precedence in the stack, highest outside mystack.push(input); else if (input == ')') while (!mystack.empty() a...

[6 replies] Last: Got it working. This was all caused by indentation errors by not using... (by cppnoob25)

by closed account LEw7X9L8

Switch DNA Strand?

How do I convert dna from an array to complementary dna. void print_reverse_complement(const char dna ) { the above function will convert DNA to Complemen...

[1 reply] : Start with a function that returns the complement of an individual nuc... (by dhayden)

by closed account 2UD8vCM9

Question about organizing class with many methods

Okay so i'm working on a small game just for learning purposes. Since the game is multiplayer, I have many things to manage. For example, I have a few dif...

[3 replies] Last: First instead of using namespaces on enums, use enum classes, they are... (by poteto)

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