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Beginners - June 2020 (Page 10)

Hey guys, I need to do an assignment for university, but I'm a complete noob, so maybe you can help me here. There is piece of code below and I need to complete...

[1 reply] : What have you learned about C++ so far? Do you know how to write a cla... (by Ganado)

by mermaidly

Making sure there is a certain character in string

Hello, how do I make sure the input that I get ends with a full stop '.' using do-while? Example: Hello. #include <iostream> using namespace std; void upper...

[7 replies] Last: Careful - this will not behave properly if the string is empty. (by mbozzi)

by tuanle007

offset values and operators to increment pointers

line 17 "Counter" is undefined. how do I fix this? // Listing8.9.cpp : This file contains the 'main' function. Program execution begins and ends there. ...

[2 replies] Last: oh ok. thank you!! i was sitting there for 30 mins. couldnt figured ... (by tuanle007)

by taniam

Math problem

I just started learning C++ and I have to solve this problem: Let be x an integer variable. For what values of x does the expression x+7==8*x take the value 1. ...

[5 replies] Last: 1) that is just mathspeak. x is a variable. It could be 23. It cou... (by jonnin)

by Shervan360

expression must be a modifiable lvalue with 2D arrays

Hello, I have an error in the constructor. Please help me. Thanks #include <iostream> #include<string> using namespace std; class MyMatrix { p...

[2 replies] Last: my = s can be changed to: memcpy(my,s, sizeof(int)*9); //9 is 3*3. m... (by jonnin)

by mpelle

My code only works for specific test cases, and I'm not sure why.

I'm doing an extra credit assignment and my teacher said that my code doesn't work for all test cases, only specific ones. I'm not sure why. She also said that ...

[3 replies] Last: result is meant to change, it is the sum of the values in the row of ... (by George P)

by closed account yvUR216C

Help With #define

Hello, I have a problem with #define macro. I would get _DIGIT_ number x with the macro _DIGIT(x) #define _DIGIT_0 5 #define _DIGIT_1 6 #define _DIGIT...

[9 replies] Last: this looks like you want an enum to me. (by jonnin)

by mj425

Functions

I'm trying to pass the total from another function to the main function but I'm having trouble. I keep getting 1.5 instead of 7. What am I doing wrong? #incl...

[2 replies] Last: from time to time, just redoing it feels like the best way to xplain i... (by jonnin)

by tuanle007

pointerS, HOW COME my answer is different from the book

how come my answer is different from the book? are the addresses not the same? Integer age = 30 Integer dogsAge = 9 pointsToInt points to age pointsToInt = 0x0...

[3 replies] Last: at little more on that, a pointer is the location in your computer's ... (by jonnin)

by jeraya6

1D array problem

Hi Everyone! i have a small program here,i let the user choose the size of the 1D array and it's elements and if they want to print it they should press 1.. no...

[2 replies] Last: int a ; creates an array with zero elements in it, and no way to cha... (by George P)

by jeraya6

functions not working

Hello again, i made some progress with this code, now the problem i face is everything works fine except for the 3rd option, i see both functions are written c...

[7 replies] Last: int x=1; while (x == 1) cout<<"thanks alot man"<<endl; (by jeraya6)

by LegalWeasel

Help With Averaging

I have made this post before with answers that solve a previous problem but now a new one has shown up. When you enter the first value the code doesn't go onto ...

[10 replies] Last: All problems with the code have been fixed, A file was simply in the w... (by LegalWeasel)

by LegalWeasel

Help With Averaging Code

Write your question here. Could someone help me figure out why the program has an initialized local variable? #include <iostream> int main() { int n; ...

[5 replies] Last: Hey there, Thanks for all the advice given, sorry if it was a bit of a... (by LegalWeasel)

by confundido

BST Algorithm Copy Only Even Data

I am looking for assistance with an algorithm to copy even data in a BST of integer data. I have a somewhat working algorithm, but it misses some right nodes, a...

[4 replies] Last: Yeah, the intent (I imagine) is more problem solving. But yeah, some o... (by confundido)

by RslWlsn3

Parsing string

Say I have a string with json like data such as "{"flight_number":65,"mission_name":"Telstar 19V","mission_id":["F4F83DE"],"launch_year":"2018"" How can I ex...

[4 replies] Last: Your structure is: { "A" : B , "C" : "D" , "E" : ["F"] ,... (by dutch)

by rhap123

How to update the data in txt file

Im trying to update the data but I am not sure on how to update it. ofstream myfile; myfile.open("data.txt"); cout << "Update the existing data"<<endl...

[6 replies] Last: That is why Im having problem when updating the file. I have already m... (by rhap123)

by LegalWeasel

Error Spotted In Places With No Error.

Error Spotted In Places With No Error. Expect a ';' at line 26. Syntax Error: 'string' at line 30. Syntax Error: ';' at line 34. Syntax Error: missing';' befor...

[1 reply] : The word "string" doesn't appear a single time in the code you've show... (by helios)

by brian marshall

Is a class the answer to my function mess?

I periodically write code for embedded microcontrollers. Most of it is pretty simple. I've gotten by using functions. Some functions have static variables whi...

[5 replies] Last: To make Jonnin's suggestion fully match your original post, you'd add ... (by dhayden)

by Hassan1995

Taking output of pgm file format to construct frequncy table

here I am reading a PGM format I want to construct a frequency table for Huffman compression and decompression in C++ how can I extract the output of the pictur...

[3 replies] Last: > i'm new to C++ and data structure Perhaps you should start by writin... (by salem c)

by kenken

While loop help

Would someone please help me understand why the following codes produce different outcomes for the variable sum when the variable number's type is changed to un...

[3 replies] Last: Both sum AND number wrap around when entering -1. std::cin goes int... (by George P)

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