Beginners - C++ Forum - December 2017

I want to create a highscore system, how can i write to the file and save the input, and how to i output the data on the text file if the user selects the 2nd o...

[3 replies] Last: Is there a way i can just read the whole file and output it? #inc... (by Chervil)

by flav32

return statement

When and why do we sometimes return a variable instead of 0?

[6 replies] Last: I feel a bit stupid now. There are some things that I just miss withou... (by flav32)

by pavik

find '\r' character in a string

Here is my pice of code: void readToArray(array<string,ARR_SIZE> &arr){ string word; int crPos=0; ifstream file("input.txt"); if(file.is_open(...

[5 replies] Last: Thx for all replies. It's very usful to know the backround info descr... (by pavik)

by Handge

Multiple .cpp files or just one

I'm making a text RPG game in C++, and was wondering if it would be a smart idea to have the Acts split into their own .cpp files? For example main.cpp would st...

[3 replies] Last: Yes, but ... A program does operations on data. Is each act really a ... (by keskiverto)

by liz Lopez

grocery list using arrays

Someone, please help. Write a program that allows you to enter grocery item names into an array of strings and the cost of each item in an array of doubles. ...

[1 reply] : Figured it out myself. #include <iostream> #include <iomanip> using n... (by liz Lopez)

by sanndy2

C++ function the norm (magnitude) of the vector

how to calculate he norm (magnitude) of the vector A = (a1, a2, ... ,an). #include<iostream> using namespace std; double norm (double ,int); int main ...

[3 replies] Last: #include <numeric> #include <cmath> double norm( const double x , ... (by JLBorges)

by moosyman

SDL context could not be created

I'm trying to make an SDL window, and from what I'm getting everything is running fine for the most part up until I try creating SDL context for the window. - ...

[3 replies] Last: But the compiler would notice. Compile with warnings on; use your too... (by mbozzi)

by spartannn

OOP inheritance error

Iget following error on code below, but can't understand what's wrong as I tried similar case and it works, could someone help me? 24|error: ISO C++ forbids de...

[2 replies] Last: Oh, wow, how did I miss that. Thank you! :) (by spartannn)

by tfahadhafiz

User inputs incorrect display error message and ask to re-enter correct input

I'm almost finished with my program. Just left with the error checking which I have no idea to do. I tried using do while loops but it's not working for me. I'm...

[6 replies] Last: I would've stored everything in cents using integers and only done the... (by Peter87)

by tfahadhafiz

if else statement problems?

I am new to programming. The problem I am having is at the part of withdrawal. When I input the amount to be the exact for example I have total of 2.45. When I ...

[5 replies] Last: http://www.cplusplus.com/forum/beginner/227574/ (by tfahadhafiz)

by Bopaki

Error" new_account was not declared in this scope

the following program is exactly as it is in the book by Walter Savitch but when I compile it I get the error in the title. //Program to demonstrate the...

[4 replies] Last: Thanks Thomas1965 the second option solved the problem. Some of the pr... (by Bopaki)

by Lucas Fiorini

typedef struct or just struct

What's the difference between "typedef struct" or just "struct"?

[2 replies] Last: Now I got it! Thanks sooo much! (by Lucas Fiorini)

by cidex

Strange number with fn pow

So I have this loan formula K = (S * (P/100/12)) / (1 - (1 + (P/100/12))^(-Y*12)) and I converted to this double Prots = (P / 100 / 12); double Num...

[3 replies] Last: P, Y, S are all double #include <iostream> #include <cmath> int mai... (by cidex)

by BearDone

error in stacks: no response in stdout

I dont know why the programm doesnt print #include <cmath> #include <cstdio> #include <vector> #include <iostream> #include <algorithm> #include ...

[13 replies] Last: Thanks a lot,to you too, ne555 ,you helped me with solving the problem... (by BearDone)

by shirshir950

functions - matrix

Hello everyone! I have some problem with this question . The question is to program funciton which gets matrix which is not sorted and all i need to do is to ...

[7 replies] Last: i think i should have had the optimiztion of j<i (by shirshir950)

by chuvak

Returning pointer by a function

Is this a legal operation? And would it work the same with char* pointer ? class someClass { int value; int* pointer; public: ...

[9 replies] Last: I'm not sure about it but I would recommend to try avoid these as they... (by benhart)

by play4u

new char[] allocation returning array with wrong size

Hello! I'm sriting a program, for which I wrote a small function to add a character(c) at the end of an input c string (src). Pretty basic stuff. Here's the ...

[6 replies] Last: Make sure you know how to use allocation the right way and control it ... (by benhart)

by hsok2003

c++ program help fix the code set operation arrys

the question is : Q-1: Set Operations: Write a C++ program that uses one dimensional arrays to implement Set operations i.e. union, difference and intersect...

[3 replies] Last: those kind of errors occur and handled after running for the first tim... (by benhart)

by gottalovecoding3

FUNCTIONS

Hello everyone! I have a really important homework that will take only like 30 minutes to be done but I find it difficult to do it.It is a really important to ...

[1 reply] : Post your code (by SamuelAdams)

by ZekDe

ASCII Protokol

Write your question here. Hi guys, I need device to device limitless data transfer with C or C++,How can I solve this problem ,I'm using Uart protocol 1 byte

[2 replies] Last: first uart is not a protocol, it's a actual chip in the device. I'm no... (by SamuelAdams)

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Beginners - December 2017