Beginners - C++ Forum - January 2015 (Page 20)

Code efficiency and returning multiple values

Hi. I'm coming from Matlab to C++ and my head is twisting about itself. I want to write a simple program for printing the solution of a quadratic equation, whe...

[4 replies] Last: Using structs seems to make more sense, so I will stick to that Or yo... (by MiiNiPaa)

by Tenom722

Writing a file to a specified path...

On line 18, I'd like this file to save in a folder in the same directory called "Usernames". Because I'm using c_str(), it will create a str file instead of a ....

[5 replies] Last: UPDATED CODE: #include <iostream> #include <vector> #include <strin... (by Tenom722)

by etrusks

problem with -->while (std::cin >> currNum)

Hi, im trying to learn C++ again and im a bit confused here. Im trying to build a program that would count how many equal numbers are in users input like for e...

[4 replies] Last: shout if you have a problem. i coded up an example while i was eating ... (by mutexe)

by LilianaVess

Read 20000 .wav data

I try to read a .wav file and output 20000 data, then apply fft, but I got some problems. (realize the function 'wavread' of Matlab in c++) Here is my code. ...

[3 replies] Last: But when I use sizeof(long), the program returns me some stuff weird.... (by coder777)

by maglia

C++ flowchart

Hello. I have to draw a flowchart of C++ program. We did not do this on classes, so I have no idea how to do that. Here's the program: #include "stdafx.h"...

[1 reply] : I don't know much about C++/CLI i'm afraid (as what you've posted isn'... (by mutexe)

by Christian0555

switch case break

CAN YOU PLEASE HELP ME FIX MY CODES ASAP PLEASE TYVM :( #include <iostream> using namespace std; int main () { int number = 0; cout<<"Enter...

[4 replies] Last: Okay Thanks I get it haha (by Christian0555)

by UMK Games

C++ graphics tutorial for beginners

How to create graphics in c++ and create some Animation and Games Tutorial for Beginners,Watch this whole Playlist. https://www.youtube.com/playlist?list=PL...

[no replies]

by Vandalism

Delete Entry

Desired Output: address book what would you like to do? add edit delete view search exit please enter your choice: 4 . . . No. FN Ln Add Cnum 1 ...

[7 replies] Last: Thank you! It now works! The only problem i had is my structure is a c... (by Vandalism)

by patriic48

Can´t find out the code for character < in c++

Can´t find out the code for character < and > in c++

[1 reply] : @patriic48 cout << "\x28 \x29" << endl; cout << char(40) << "... (by whitenite1)

by DexterMorgan

Array of objects without explicit constructors

I have a class: class myClass { double x=0; double y =0; public: std::vector<double> xpoint1, xpoint2, ypoint1, ypoint2; void foo(const std...

[1 reply] : I replied to your other post. (by kevinkjt2000)

by SusieMartin1

C++ Program to square a number

I need to write a program that reads in an integer and writes the square of the entered value. *Get the input with a function called getNumber() * Display th...

[4 replies] Last: well if your just squaring it u can just do it times its self. #inc... (by kmtompkins)

by TommyCarstensen

Parsing

How can I put the lines of a file into an array, if I don't know the number of lines beforehand? Below is what I do in Python. with open(file_input_sa...

[1 reply] : Use a vector of strings: http://www.cplusplus.com/reference/vector/vec... (by kevinkjt2000)

by Selver

Reading from text file

Working on an assignment for my algorithms class, the code is supposed to read in input from a given text document, reverse the given set of letters, and then o...

[4 replies] Last: Okay, I feel retarded. I included fstream but declared my infile as of... (by Selver)

by meme44

Help with Shapes!

I'm wondering how to create the following shape with loops. We worked on a few others in class, but I wasnt overly comfortable with them, and wanted to try some...

[1 reply] : Try understanding the underlying mathematical pattern first. Each row... (by kevinkjt2000)

by Maria96

Homework Assignement. Please, help

Hi, i am new to c++ programming , i have to write a program for homework. It has to include a function with a prototype int max_min9(int n). n is a three-digit ...

[1 reply] : What if you would go directly into a string, and sort it both ascendin... (by keskiverto)

by Burhan salman

Undefined var still prints

how can this code work? how can it print num1 in main function when num1 has not been defined as a var by me??? #include <cstdlib> #include <iostream>...

[2 replies] Last: Yes, indeed num1 was defined by you. num1 was defined by you in line ... (by tipaye)

by jhoda26

Automata theory!!!!!

How can i create a program with an input string and follows the ff. rules in Dev C++. first rule Identifiers: starts with a-z and ends with a-z and 0-9. sec...

[1 reply] : Where do you get stuck? What part do you not know how to do? What do... (by kevinkjt2000)

by mozart23

Unknown error in the code.

This code is giving the error: Pl.cpp:39:7: error: non-ASCII characters are not allowed outside of literals and identifiers cout<<‘enter l : ‘ Pl.cpp:3...

[4 replies] Last: I'm guessing you did copy & paste with this. If so, you didn't get pur... (by tipaye)

by Bipolar Worlds

How to make a program or function run within a specified time period?

I've been researching on it for quite a while but still don't know how to do it. #include<chrono> seemed to be the answer at one point but then I realized I can...

[3 replies] Last: A bare-bones do-little example then: #include <unistd.h> #include <ct... (by tipaye)

by closed account E3h7X9L8

Triple character in char array..

why doesnt it work ? how can i fix it ? #include <iostream> #include <string.h> #include <stdlib.h> #include <stdio.h> using namespace std; int main() { ...

[11 replies] Last: Keskiverto is right. The best way to do this is to use std::string, b... (by dhayden)

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Beginners - January 2015 (Page 20)