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General C++ Programming - January 2015 (Page 20)

What will the following code display?

# inlcude <iostream> using namespace std; void test(int &, int =1, int =1); void test( int, int *, int&); const int SIZE = 4; int main() { int first=1. ...

[4 replies] Last: Or better yet, use a debugger. Yes, as I said in my other post to... (by TheIdeasMan)

by Oatcake

Encryption Algorithm

Hi, I have got to create a program that will gather input from the user and then encrypt & decrypt those characters. I'm not very confident at coding so I'm ...

[2 replies] Last: 2. Would I need to create separate class files for both functions? Yo... (by tcs)

by flambert

Call by Referenc with this as Referenc

Hi, I have a question. I would like to get the this pointer by call by reference. Is this possible? I hoped to get it with this code, but it doesn't work: [...

[4 replies] Last: test2 is now a copy of test1 . Both are different objects as befo... (by tcs)

by gaurav97

logically correct or wrong ?

Is this program logically correct or just dumb luck ? Please see the lines 9 to 12 . That is where I made some random changes and this code worked ! #include...

[5 replies] Last: i dont think there is any need to change. its running perfect (by gaurav97)

by MarkyMark

Why is this structure member not displaying?

I have started working with structures so here's a side project from my text book. It's purpose is fairly simple; it asks for the sales of each quarter of the y...

[2 replies] Last: getCompanyInfo is quite wasteful: - Since the parameter R is passed by... (by dhayden)

by lostbits

Passing a function as a parameter

gcc v.8.3 -std=gnu++11 http://www.cplusplus.com/forum/general/27641/ I'm trying to pass a function as a parameter and failing. I've looked at the cpluspl...

[2 replies] Last: also, your new type (line 2) is "func", not "func_t", so lines 4 and 1... (by tipaye)

by gaurav97

Awkward situtation ! Not able to understand..

This code force closes on codeblocks but works perfectly on an online compiler "http://www.tutorialspoint.com/compile_cpp_online.php". Can anybody explain why t...

[6 replies] Last: |17|error: no return statement in function returning non-void [-Werro... (by bugbyte)

by NickCullen

C++ Factory Pattern Tutorial

Hey guys, I made a c++ Factory Pattern tutorial on instantiating components (much like that used in Unity) via strings. You can find it here http://blog.n...

[no replies]

by MarkyMark

Why will cout not print this std::string?

#include <iostream> struct WeatherStats { double total_rainfall; int high_temp; int low_temp; int avg_temp; }; WeatherStats getWeatherData(st...

[2 replies] Last: kill me now -_- (by MarkyMark)

by gaurav97

this program works and doesnt work. explain why ?

hey guys ! I just wrote this code but it is giving a segmentation error. The code and its errors are just below. Please look at it and tell me whats wrong. Co...

[3 replies] Last: You got your x and y mixed up in line 9 and 10, so when you had x = 3 ... (by tipaye)

by gaurav97

sum of the diagonals of a matrix. program giving segmentation error !

After entering the values of the matrix, it is giving me segmentation error. Can anybody explain why ? also "if possible", correct it #include<iostream> u...

[2 replies] Last: Thanks ;) I have made the corrections and it is working fine now. Here... (by gaurav97)

by killer13666

Error with binary IO

I am trying to make a program like a virtual machine, and therefore I need to have a virtual hard drive. I have it split across four files, each being exactly 6...

[3 replies] Last: I was wrong :) (by LB)

by ntran

Distinguishing between numbers and other symbols

Hi everyone, I'm reading a text file and extracting pieces of information of it by means of parsing (line by line). Here is an example of the text file: 0 ...

[1 reply] : Try to read, if it fails then it was not a number. #include <iostream... (by ne555)

by LB

What exactly is std::iostream::pos_type?

http://ideone.com/V5kx2p[code firstline=6]std::cout << sizeof(long long) << std::endl; std::cout << sizeof(long double) << std::endl; std::cout << sizeof(std:...

[1 reply] : It's std::fpos<std::mbstate_t> , and it's not just offset, it's also ... (by Cubbi)

by dkaip

How code must be to not have multiple definitions of var?

Hello, In code i don't understud how code must be to not have multiple definition of var? If i have a function how i must put? memory.h #ifndef MEMORY_IN...

[1 reply] : http://www.cplusplus.com/forum/general/140198/ (global variables) don'... (by ne555)

by NuckFuggets

Help with input file sorting?

Hi everyone, im kinda new to c++ but i know the basics as i had to take an intro course as one of my classes last term. right now im on my work term and i have ...

[1 reply] : so yeah just clarified what im supposed to know what to do with the c... (by NuckFuggets)

by HelpAsking

Please Help Me Define and Macro Not Check Value

#include <Windows.h> #include <iostream> using namespace std; #define MAX(a,b) (((a)>(b))?(a):(b)) int main() { int a = 7; int b = 5; cout ...

[2 replies] Last: ok thx but how can make macro same _MSC_VER return integer and can che... (by HelpAsking)

by Matep

saving RGB pixel data of a .jpeg image in 3D array

I need to save RGB values of each pixel in a 3D array A . I found a code online that transfers the bytes into an array but I cant understand how bytes are sav...

[6 replies] Last: Sure, but then i also have to change the quality enchanceing algorithm... (by Matep)

by tmason

C vs C++ - Request for more information ... (1,2)

Hello, I know this is a debate that has been raging and debated forever, but I am wondering if there is any definitive information on this: is C faster than ...

[24 replies] Last: Excellent! I knew white papers existed but I guess I was searching inc... (by tmason)

by rahmanian

Data Segment Backups

Hi dears I want to have a backup of the data segments of my running program. How do that in c++? I need restore it a few seconds later. Thanks

[2 replies] Last: Unusual but quick solution: In Posix You can fork(). Second process ma... (by Konstantin2)

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