Beginners - C++ Forum - February 2019 (Page 19)

Why isn't my program giving me random numbers each time I print double random(unsigned long int & seed) { const int MODULUS = 15749; const i...

[5 replies] Last: put seed = rand() after srand call. seed is technically randomish bec... (by jonnin)

by ramp00

What does it mean when code builds successfully, but doesn't run

Hey! I have a problem with a program not running. What does it mean when the compiling works, but running the program fails? I use Visual Studio 2017 btw. ...

[6 replies] Last: Hmm, yeah I see. Thanks guys! (by ramp00)

by iamyiyaj

My code compiles but will not create output file:

I am using Visual Studio 2015. I check the directory after compiling the code and no txt file pops up: #include <iostream> #include <fstream> using na...

[2 replies] Last: Thank you for that. Turns out all i had to do was change to ofstream (by iamyiyaj)

by CaptainLupa

Constructor

I'm trying to make a text game like Zork and currently I'm trying to get a constructor to make a randomly generated number. Then with that number, print a diff...

[2 replies] Last: Ohh, ok that makes sense, thank you very much. (by CaptainLupa)

by honeybuzz

Find coordinates of a rectangle by asking <= 7 queries

We are given a hidden rectangle. We can ask the computer a maximum of 7 queries and in each query, we specify a coordinate x,y. The computer then returns the m...

[4 replies] Last: Please somebody help me in xor decomposition problem (by Dum)

by krz

I need help in solving an Array Based Expression Calculator

I am not understanding how I can print this array in the form that the question is asking. Please help. Problem: This problem considers specifying an expressi...

[no replies]

by closed account Ezyq4iN6

Need help reading/sorting/writing data to and from a file.

Let me start by saying I know how to read from a file and write back to it, but I am having trouble with picking the best way to go about doing these things. Pl...

[15 replies] Last: I never considered the portability issue when using binary. I actually... (by closed account Ezyq4iN6)

by chemistCoding

issue with WM_GETTEXT and char buffers

Hi! I'm a chemist new to coding and am working on a script to help me automatically process some of my data. The code I'm working on right now involves using WM...

[no replies]

by Zivojin

Problem with circular dependicies

Hello guys.I am trying to resolve one problem but i can'n.I have two classes: class FileSystemElement and class Folder.Class FileSystemElement contains a pointe...

[9 replies] Last: moving an include to the end of a file tickles my OCD I hear ya. Th... (by dhayden)

by John Davis

Reading numbers from a txt file

I am trying to create a function which: 1) Asks for a filename from the user 2) if it exists it takes in the file and prints out the contents of it 3) If the f...

[2 replies] Last: Hello John Davis, I loaded up your program and ran it. What I found:... (by Handy Andy)

by Darkware

The : in function definitions?

int addTwoNum(int a, int b) : (bunch of crap goes here) { return (a+b); } What is it called so I can look up information about it? I tried looking...

[4 replies] Last: Thank you for the quick replies. I will look into it. Thanks. (by Darkware)

by John Davis

2048 Game: How to overcome this bug?

I am testing it using: int main(){ std::vector<int> v{1,1,1,1}; bool c = game_over(v); if(c){ std::cout << "true" << std::endl; ...

[7 replies] Last: Ah! I have solved it thank you. (by John Davis)

by nick372060

Arithmetic Progression Using recursion C++

I wrote c++ code which gets first character of progression (a1) difference (b) and size of progression (n)from user and my code must print arithmetic progressio...

[5 replies] Last: #include<iostream> using namespace std; void arth( int a, int b, int... (by lastchance)

by Cantstrikeout

Help answer a problem

Write a C++ program that defines a function that prints every “x” character in the string. a. For example, with a string “Hello World” and x = 4, the...

[2 replies] Last: Create a function that takes as its arguments the string and the incre... (by lastchance)

by usmannazir

structure and function

I am using structure and function combination to print data in the console, but I am not successful, can some one suggest the required changes in the code. ...

[3 replies] Last: cin>>d1.u_star ; Grid is equal to 5 and you which means that your ... (by H00G0)

by Bopaki

I need some help on this function definition

I am trying to compile a file personType.cpp and I get this error when compiling operator= here is the error: MalikChapter10\Election Results\personType.cpp:3...

[7 replies] Last: next code candidateTypeImp #include <iostream> #include <string> ... (by Bopaki)

by yat89

Insert value at the beginning and the end of 2d vector

Hi everyone. I am new to c++ programming. Given a task to insert zero at the beginning and the end of each row of 2d vector. I had try to code it but errors occ...

[2 replies] Last: Thanks Peter87 . Its work after I insert route and remove vector<... (by yat89)

by usmannazir

Function not showing any output

Dear friends Can some one tell me why am I not able to print the simple output in the single function defined in the code below. #include<stdio.h> #inc...

[2 replies] Last: @dutch Thanks (by usmannazir)

by thehennydon

Default Constructor

...

[3 replies] Last: I would do something like this: class date { public: en... (by JLBorges)

by treefitty

OpenGL: Best way to precisely copy pixels of an image to screen?

Hi, I am attempting to write a simple 3D OpenGL 3.1 engine (older spec targeted for retro gaming rigs), and I would like to know the most efficient way to do a ...

[3 replies] Last: Its been a WHILE since I did gl, but I do believe it was 2 triangles. ... (by jonnin)

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Beginners - February 2019 (Page 19)