General C++ Programming - C++ Forum - January 2020 (Page 7)

by julie2019

Top 10 bugs found by the static analyzer in C++ projects in 2019

Do you want to look into the darkest spots of open source projects and see what kind of bugs are waiting for you there? Then check out the most interesting bugs...

[no replies]

by dariodem

Saving multidimensional vector to hdf5 format.

Hello Forum, Since multidimensional vectors in C++ (vector<vector<vector<etc...>>>) are not necessarily rectangular, we have to find an efficient way to sav...

[1 reply] : Never done that, but since HDF5 has C++ interface and documentation, I... (by keskiverto)

by caragones

SFINAE problem

Hello, I'm trying to use SFINAE to detect when a class has a member function but I have found a problem when the class has two member functions with the same n...

[3 replies] Last: template <typename C> static constexpr std::true_type test (d... (by mbozzi)

by abdallahosama

Exception Thrown

Im trying to sort an array without using sort built-in function and i dont know why im getting this error ( using visual studio 2017) Exception thrown: read ...

[7 replies] Last: @doug4 i apologize to you i really do but i couldn't handle the situat... (by abdallahosama)

by shanno8

How would I Re-write the following binary search function so that it uses recursion

int binary_search(int arr , int find, int low, int high) { int middle; while(low <= high) { middle = (low + high) / 2; if (arr < find) low = middl...

[5 replies] Last: #include <iostream> int binsearch( int A , int value, int low, int h... (by lastchance)

by abdallahosama

Exception Thrown

Im trying to sort an array without using sort built-in function and i dont know why im getting this error ( using visual studio 2017) Exception thrown at 0x0...

[2 replies] Last: I don't see the unresolved external. You don't need <algorithm> in yo... (by doug4)

by lo2

How to detect stack overflow?

Hi there, Recently I tried running my C++ program with a much larger data set, and I quickly got an error crashing the program. I was quite surprised, as thi...

[7 replies] Last: if it helps the vector version of double cov ; is vector<double> cov(... (by jonnin)

by mnnsa

is this a dynamic programming problem

is this a dynamic programming problem can you give some tips to solve this ..... You are given an array B of length N. You need to construct an array A of posi...

[5 replies] Last: thanks, got it (by mnnsa)

by Aceix

Can a function return value be used in declaring an array

Hi guys, is this valid C++14? int factorials = { factorial(0), factorial(1), factorial(2), factorial(3), factorial(4), factor...

[2 replies] Last: oh...okay thanks (by Aceix)

by shanno8

How would I re-write the GetMin function

How would I re-write the GetMin function so that it can return and take as parameters any datatype (not just int) int GetMin (in a, int b) { if(a<b...

[2 replies] Last: template <typename T> T GetMin( T a, T b ) { return a < b ? a : b; }... (by nuderobmonkey)

by marhuum

C++ namespace with exception

is there any in C++ to use namespace with one, two, or three name exceptions ?

[1 reply] : The presence of a using statement using namespace std; Doesn't pre... (by mbozzi)

by yabi2943993

Last digit of the factorial of an integer

Hi. I am trying to make a program which first reads the number of times the program should be able to process my calculations and then processes it and outputs ...

[5 replies] Last: if you just want a factorial, there are a fairly small # you can have ... (by jonnin)

by marhuum

optional argument of a function

How to have optional argument of a function, being explicitly meant so with condition rule: . if argument/parameter exists, it's as is supposed to be . if i...

[15 replies] Last: @mbozzi, Thank you. That explains it. And that wg21.link redirect site... (by dutch)

by shanno8

How many times is the constructor called in the following code

How many times is the constructor called in the following code? and explain why. Apple func() { Apple w; Return w; } void main() { Apple x; ...

[3 replies] Last: [quote=shanno8]How many times is the constructor called in the followi... (by lastchance)

by akash16

Read Config File

The code below parses the config file. After we successfully load the file, we read it line by line. We remove all the white-spaces from the line and skip the l...

[6 replies] Last: Thanks All. (by akash16)

by marhuum

what's the std::function<>

Could you explain us what std::function<> is all about?

[3 replies] Last: crystal clear ! Thank ! (by marhuum)

by shanno8

What is the difference between the following two code segments?

// code segment 1 int i = 48; char ch = i; // code segment 2 int i = 48; char ch = static_cast<char>(i);

[1 reply] : First code converts the int to a char. Second code casts int to a char... (by Ganado)

by ravss2

OPP Design For my Solution

I am working on a problem for which i have already developed a solution, but i am new to OPP prgramming and started learning recently. Would request OPP Gurus t...

[14 replies] Last: // TODO const, &, * #include <iostream> #include <string> #include... (by againtry)

by leelion

inability to read line, more than a specific one!!

Dear I have a piece of code. It reads input files (Data.txt, Index_list.txt, and Nb_list.txt) and gives output file (NB.txt). Index_list.txt, and Nb_list.txt...

[1 reply] : > for (int linenox2 = 0; getline (Index_list_1,line1) && linenox2 < at... (by salem c)

by JUANDENT

What is the meaning of not specifying a template parameter?

Hi, I found this code which I don't understand: using namespace boost; auto injector = di::make_injector( di::bind<ILogger>().to<ConsoleLogger>...

[1 reply] : I believe di::bind is a template struct and di::bind<ILogger>() create... (by JUANDENT)

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General C++ Programming - January 2020 (Page 7)