Beginners - January 2018 (Page 13)

basic string operation issue
This few lines of code are supposed to extract integers from "it" to "s1", until a '/' is found, however i get a subscript range error, what did i screw up? ...
Jan 15, 2018 at 10:33pm
[3 replies] Last: Good to hear, although I do still encourage the use of the std::string... (by Ganado)
by wtbe
Student grade sort program
Write your question here. /* This Program takes the average of a user's test after dropping the lowest test score. You can enter as many scores as...
Jan 15, 2018 at 10:26pm
[5 replies] Last: When I fix the problems with getScore(), the code works for me. I sug... (by dhayden)
by al8888
cant return float value
why does it not return the float value and return true or false instead. #include<iostream> using namespace std; float myFunc(float); float theP...
Jan 15, 2018 at 6:27pm
[4 replies] Last: Hi al8888, in addition, you also must return a value here, or otherwis... (by Ganado)
by sevic
Finding index of custom element in vector
Hi I have a vector of objects of class Person(id,name) and i wanna know is there a way to find a person index in vector by its id and name? Is there a way to...
Jan 15, 2018 at 1:59pm
[2 replies] Last: You may use find_if. See: http://www.cplusplus.com/reference/algorith... (by coder777)
by mmgh
abstract base classes and derived classes
Hello, If I define an abstract base class with for example 10 virtual methods, then do I have to define all the virtual methods in any other class I derive f...
Jan 15, 2018 at 1:12pm
[1 reply] : > If I define an abstract base class with for example 10 virtual metho... (by JLBorges)
Need help with an exercise
Can someone please explain how this code could work? I can't find a way to approach this problem. Given n names and phone numbers, assemble a phone book ...
Jan 15, 2018 at 8:20am
[1 reply] : For how map works see this: http://www.cplusplus.com/reference/map/ma... (by coder777)
how to use find algorithm in C++ with Objects
how do i use the find algorithm to check if a certain object exists in a vector. I have a base class called Shape and derived classes Circle and Line. Circle...
Jan 15, 2018 at 8:12am
[7 replies] Last: -> bool determines the return value. It can usually be automatically... (by coder777)
Student Grades Using File I/O and Arrays
I'm required to input the student id, exercises, total of the ten assignments, midterm, the final, and extra credit points. Combined, the assignments are all ou...
Jan 15, 2018 at 6:42am
[1 reply] : > Here's the source code and output file ¿where's the input file? ¿h... (by ne555)
Help!
What does this code do line by line and is there a problem with this code? int main (){ vector<int> v( 5, 1 ); for( int i = 0; i < 5; i++ ) { v =i ; ...
Jan 15, 2018 at 2:54am
[1 reply] : Have you tried to run it ? (by SamuelAdams)
by Carat1
cheat engine to c++ help
i need someone with cheat engine knowledge. i need help memory scanning for a pointer. the code below scans for an address. scanner::find_pattern(0x0000000...
Jan 15, 2018 at 1:48am
[2 replies] Last: Numbers (and pointers) in the x86 are stored in "little endian" format... (by dhayden)
Give references values?
Why is this possible?: #include <iostream> using namespace std; int main(){ const int &a = 10; //<- this return 0; } I thought I understood references...
Jan 15, 2018 at 12:16am
[1 reply] : Well, the short answer is that you can do that because the standard sa... (by Ganado)
by jojfjo
Exponents in formulas
Hello doing a project for school and little confused by my error. this is my formula; so I have all my values declared as doubles. And then after declaring...
Jan 15, 2018 at 12:12am
[2 replies] Last: i figured not to use cmath because it was not shown or spoken of at an... (by jojfjo)
array of characters: it doesn't print the exact size!
in this code, the output is 6 instead of 5, i didn't get it! the condition is to not include '\0', is the compiler counting it ? #include <iostream> usi...
Jan 14, 2018 at 11:24pm
[4 replies] Last: ...and to clarify further, you're thinking of string literals. They wi... (by Ganado)
by Jsmo10
My output doesn't match locals
Hello all! I need help with my findHigest and findLowest. In the locale it is listing the right numbers but I can't get the output to match what the locale has....
Jan 14, 2018 at 10:41pm
[1 reply] : > cout << "The Best Player is Player Number: " << findHighest << endl... (by ne555)
code giving wrong output after comparing against file
Why will my code only output that the password has no match in the file even when it does match a password in the file? The whole program is way longer than thi...
Jan 14, 2018 at 9:53pm
[4 replies] Last: Thanks for helping me with this question. (by hornet13)
SDL2 tutorial, guides?
I have been playing around with C++ for a while now but wish to get started with game development in SDL2. I've watched several videos on YouTube but none seem ...
Jan 14, 2018 at 9:21pm
[2 replies] Last: Thanks! I'll look in to it.😃 (by Sigge414)
by ZekDe
I couldn't think a good title for this.Simple question
Hello friends, I am not able to understand this,could you help me.I am using Qt creature //This is in .h class MainWindow : public QMainWindow { ...
Jan 14, 2018 at 8:37pm
[4 replies] Last: I am new communication engineer ,this is why I don't know perfectly C+... (by ZekDe)
list
Why do program crash sometimes? *update* without "delete" is working fine! #include <iostream> using namespace std; struct lista { int n; li...
Jan 14, 2018 at 1:59pm
[2 replies] Last: Thank you (by alanmonno)
by al8888
floating point exception(core dumped) and can't return -1
In my book the question is "Write a function that takes two unsigned short integers and returns the result of dividing the 1st argument by the second. Do not pe...
Jan 14, 2018 at 1:49pm
[5 replies] Last: thanks I think what the teacher wanted was: #include<iostream> using... (by al8888)
by sevic
Saving data at runtie
Hi, is there a way that is considered best to save data at runtime in C++ program? For example, we want to sort a vector of integers and during sorting, we want...
Jan 14, 2018 at 1:19pm
[1 reply] : If you mean within the same program run (i.e. not after the program en... (by Repeater)
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