C++

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Beginners - February 2022

by hevi
No clue
 
Hi, got a problem with my code. Keeps saying error : cant convert string to int. But Im not trying to do that :D Cant figure out why it thinks that. Sorry for t...
[7 replies] Last: It's because in the info function you put int first, string second and... (by mikef)
by closed account oj2wbRfi
using const with function
 
what is the purpose of using const with function void readData () {} void readData const () {}
[3 replies] Last: It is a promise that the function will not modify the object that it's... (by Peter87)
by LeslieS
Stuck trying to #include interdepenant headers
 
I have two classes and in each class I would like to have a pointer to an instance of the other. But the compiler is complaining because I can't use one type ...
[4 replies] Last: >You must forward declare ClassB. and you must forward declare ClassA ... (by ne555)
by HellocMonkey
Error code not in scope
 
I have been working this program for a while for my class so far it will not compile. The instructor was nice enough to let us take a screen shot but I only got...
[4 replies] Last: Simply without input validation consider: #include <iostream> using... (by seeplus)
by AkiraC
How to perform insertion sort for array with more than one variable?
 
Hi, I have an array with more than one variable, eg: ID, name, gender etc. And I want to perform sorting for the data in the binary file, so I decided to use in...
[2 replies] Last: There's something oddly familiar about that code.... Mmm, interesting... (by salem c)
by awesomejerik101
Printing out name of station that matches max and min temp in a file
 
Hello, I have a file that has a bunch of information in it about weather data. I currently need to find the max temp and the min temp and print out the stations...
[6 replies] Last: Another way of getting rid of the preceding whitespace is: while (st... (by againtry)
by PhysicsIsFun
sample without replacement - efficient way
 
Greetings! I have an array of which I would like to draw n samples without replacement. The quality of the randomness as well as computational efficiency is imp...
[12 replies] Last: [quote=mbozzi]Could you be thinking of Fisher-Yates? I was! But I had... (by lastchance)
by hevi
Decompressing RLE
 
Hi, I have an RLE compresser which works perfectly fine, but how do I decompress it? I have no idea how I would come about doing it. Any help? Below is compress...
[15 replies] Last: hevi, STOP reporting posts you don't like. That makes people consider... (by George P)
by Shervan360
Size of Char in C
 
Hello, I ran the following code in Visual C++ and I have 1 and 4 In GCC 11.2 I have 1 and 1 Why in Visual C++ do we have 4 for a character? Thank you ...
[6 replies] Last: sizeof(char) is always 1. (by Peter87)
by elon dusk
Keep getting 4 errors in my code and dont understand
 
hey. in my code im keep getting errors and i don't understand what they mean and how I can correct it. Im fairly new to C++. #include <stdio.h> #include...
[4 replies] Last: If you have something like a vector, then you can sum the contents eas... (by seeplus)
by AlterBlast
C++ program to read integers until 0 is entered using sentinel.
 
Hello, I'm trying to write a C++ program to read integers until 0 is entered using sentinel. (1) Display the sum of the two-digit numbers (both positive and ne...
[8 replies] Last: [See also http://www.cplusplus.com/forum/beginner/282399/ ] (by seeplus)
by Enderex
I need help with this assignment
 
I need to write a code that loads 5 numbers from a user and sums up the ones that have only 2 digits. I tried with if statements directly but couldnt get it to ...
[3 replies] Last: #include <iostream> constexpr int NoNums {5}; int main() { int re... (by seeplus)
by AlterBlast
C++ program to read integers until 0 is entered using sentinel.
 
Hello, I'm trying to write a C++ program to read integers until 0 is entered using sentinel. I want the before 0 integers to be read but the 0 not to be and the...
[1 reply] : [Duplicate post] (by seeplus)
by AlterBlast
I can't figure out this assignment.
 
Hello, I'm trying to write a C++ program to read integers until 0 is entered using sentinel. I want the before 0 integers to be read but the 0 not to be and the...
[5 replies] Last: [See http://www.cplusplus.com/forum/beginner/282399/ ] (by seeplus)
by AlterBlast
I can't figure out this assignment.
 
How would I go about making a different message appear when no positive integers or negative integers are entered, instead of it showing a really large or small...
[3 replies] Last: Perhaps: #include <iostream> #include <limits> constexpr int MinIn... (by seeplus)
by Paul50002
how to get a file line to do more than just print? (1,2)
 
hello, how can you get a text file with data like this do more than just print out a line. Fred Farkle 72 69 17 21 23 14 22 Tina Moffett 81 86 23 25 19 25...
[21 replies] Last: I liked my highschool's system best of all. 10 points per grade, so 9... (by jonnin)
by SubZeroWins
operator overloading
 
In my book the below code for the operator + is written in a way that makes a new temporary Date and returns it without affecting the original object. What if I...
[6 replies] Last: If you want to something custom & weird, I recommend using things like... (by jonnin)
by lare26
Disfunctional Function Declaration (1,2)
 
I am trying to figure out why this doesn't work. I thought I was doing it correctly. But the scope seems to be quirky. It says the variables are not declared i...
[32 replies] Last: [Moved making a game chatter here]: http://www.cplusplus.com/forum/lou... (by George P)
by vboro
do{...}while(...) loop to chech array?
 
Hi! I have an array with numbers from the user. My task is to then std::cin numbers and check if it's in the array. If it is, the program should quit the loo...
[5 replies] Last: seeplus's first sugestion worked perfectly fine, just what I wanted my... (by vboro)
by Quasar999
Constructor syntax
 
Someone could explain me the following declaration for the contructor? class GameError : public std::exception { private: int errorCode; std::string...
[3 replies] Last: As you browse those those linked pages, you should also notice that ... (by keskiverto)
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