C/C++ :: Vectors And Strings - How To Store Added Business / Sorting It And Displaying List
Feb 18, 2014
Basically I need to make a program which asks for a business name and then keeps asking for more until user doesn't want to. Once more than 1 business is enter it should display the business and sort it alphabetically and keep displaying them each time another is added. I am lost on how to store the added business, sorting it and displaying the list.
Here is what I have so far.
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
using namespace std;
int main () {
string business_name;
char selection;
[Code] .....
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Sep 23, 2014
I am creating a doubly linked list that will store strings, for example:
struct node{
string data;
node* next;
node* prev;
};
node* head; //first element from left to right (global)
node* tail; // last element from left to right (global)
And here is the function:
void deleteNode(int n){
struct node* temp1 = head;
if (n == 1){
head = temp1->next;
free(temp1);
[Code] .....
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Mar 19, 2014
I create a list of vectors (a vector of n vectors of m elements).
std::vector <std::vector <int> > vsFA (n, std::vector<int>(n));
How I assign values? I try below, but not worked
void armazenaFA( std::vector <int> &vFA) // this function only knows about vFA
{ vsFA[n] [m]= simTime().dbl();
OR
vsFA[n].push_back(simTime().dbl());
}
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Nov 6, 2014
I've been struggling with an object when trying to add it to a list with [Listname].push_back. You see, I have a list with some objects that will be rendered in the screen (Called objects) and a function to create a text box with some text. The function in question is the following:
void reprEv(int evNum, ALLEGRO_BITMAP *txtbxim) //Event to call, default text box image.
{
textBox *txtBox = new textBox("Line 1 ", "Line 2 ", "Line 3 ", "Line 4 ", "Line 5 ", textboximage);
objects.push_back(txtBox);
[Code]....
(txtNum is increased then space is pressed, and when certain screen (maxScreen) have been shown, then it will go to the playing state)
My problem begins when the text box is created, because it's supposed to add only 1 text box to objects list, but instead adds hundreds of text boxes to objects.
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Mar 3, 2012
Let's say we have entities like lines and circles. And each entity can have a pen attached. And a pen is a color and line width. All entities needs to be manipulated through a operations interface. All entities added to the program needs to be added through using a factory pattern.
So we end up something like (pseudo code)
class Line // for immutable objects {
..
..
} class MutableLine extends Line //for mutable lines {
} MutableLine line=factory->newLine(20,20,50,50); // Create a new line entity
[code]....
So, essentially I want no code to be able to operate directory on entities, unless during creation of the object (color, layer, line width etc...) so I am planning to create Mutable versions of all entities besides the immutable versions.
When requested for selected entities or all entities, I am planning to return a list of immutable objects and in fact I am planning to return a new copy so it's not possible to operate on anything directly.
The reason is that I am planning to create different storage backends swell, so I can operate on entities in a database, or shared memory... stuff like that. At least to hide the internals and provide a stable API.
My questions are:
How can I make sure that people don't do 'tricks' casts for example to a mutable version to change objects directly?
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Apr 19, 2012
I have a vector I want to add book titles to, then i want to print my updated vector. This is best I have come up with but the program fails at the getline line. why?
string book;
cout << "Enter book to add: "<< endl;
getline(cin, book);
books.push_back(book);
for(int i = 0; i < books.size(); ++i) {
cout << i+1 << ". " << books[i] << endl;
}
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Feb 4, 2015
If I have a class object and multiple vectors, how do I make sure I store the same instance of that object in both vectors? For instance:
Object object;
std::vector<Object> vectorOne;
std::vector<Object> vectorTwo;
vectorOne.push_back(object);
vectorTwo.push_back(object);
Are the objects in both vectors the same instance of the object? Like if I called vectorOne[0].setValue(somethingDifferent); would the value be changed for the object in both vectorOne and vectorTwo? If not, how do I make sure that I only have one instance of the object I'm trying to store in multiple vectors?
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Sep 29, 2013
I'm writing a program of a stock market where i read from a file and sort with symbols and percent gain/loss. I have completed sorting with symbols but having trouble establishing the percent gain loss. First i designed and implemented the stock object. call the class stockType. main components of a stock are the stock symbol, stock price and number of shares. Second we have to create a list of stock objects. call the class to implement a list of stock objects stockListType. To store the list of stocks, i declared a vector and called the component type of this vector stockType. Because the company requires me to produce the list ordered by percent gain/loss, i need to sort the stock list by this component.
However, i'm not to physically sort the list by component percent gain/loss; instead i should provide a logic ordering with respect to this component. To do so i added a data member, a vector to hold the indices of the stock list ordered by the component percent gain/loss and i called this array indexByGain. I am going to use the array indexByGain to print the list. The elements of the array indexByGain will tell which component of the stock list to print next. I have trouble going about how to implement the function sortStockGain(). Below is my entire code and the txt file. I have sort symbols working but dont know how to implement the sort by gain.
Below is my entire code:
[#ifndef STOCKTYPE_H
#define STOCKTYPE_H
#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
class stockType
[Code] ....
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Jul 15, 2013
I have two vectors of float that I need to sort in reverse order. reverse() seems to work for one of them, but not the other. I have toggled between sort() and reverse(). for one vector, the expected behavior is seen and the order reverses. For the other, there is no change in order.
This is very simple code, so it's hard to imagine what is going wrong.
Code:
vector<float> vec1, vec2;
vec1[0] = 14.1102; vec1[1] = 14.1145;
vec2[0] = 15.8508; vec2[1] = 26.0842;
sort( vec1.begin(), vec1.end() );
sort( vec2.begin(), vec2.end() );
[Code] ......
Printout is,
Code:
vector 1 sort
14.1102
14.1145
vector 2 sort
15.8508
26.0842
vector 1 reverse
14.1102
14.1145
vector 2 reverse
26.0842
15.8508
You can see that the order of the first vector did not change. Am I right in suspecting that the numbers are too similar for what ever method reverse() uses to determine the difference between values?
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Apr 19, 2012
I was given a project to program a library catalog. One of the aspects is that we have to allow an administrator to add, modify, and delete books from the catalog. It was recommended to me to use vectors. So I initialized by hand a default book list, and now I want to be able to have an adminisistrator add books and then print the modified book list. Here is what I have got:
main () {
char yesorno;
string bookname;
vector<string> books;
[Code].....
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Feb 13, 2013
I have a vector which contains vectors containing 7 integers each. I'd like to sort these vectors based on the value of the first integer (int IOT), in ascending order. I know this type of question can be found everywhere, but I'm lost as to why this doesn't compile.
#include <fstream>
#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <stdio.h>
#include <math.h>
#include <windows.h>
using namespace std;
class orders {
public:
int IOT; // Incoming Order Time
[Code] ....
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Apr 17, 2014
I'm working on a project, and I'm trying to fill in various vectors from a given input file. The input file looks like:
<catalog>
<book id ="bk101">
<author>O'Brien, Tim</author> ....etc
My load vectors function looks like this: void load_vectors(vector<string>&id, vector<string>& author...etc)
I can't assume a limit on the number of books etc listed in this catalog, so I'm using the eof() function. However, I don't know how to write the loop to gather the correct strings and place them in the vectors.
Code: while(in.eof())
{ string text;
int index, index2;
getline(in, text);
int index = text.find("<author>");
int index2 = text.find("</author>");
a = index.lenght();
author.pushback[i] = text.substr(index + a, index2);
}
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Nov 5, 2013
I have to write a program in C++, without using a selection sort, that outputs the name you enter with the lowest age. You input 5 names with ages and at the end it outputs the youngest person. This is what I have so far:
#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main()
[code]......
I Know for the second for loop there has to be if statements in it but I am so stuck on what to write next.
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Dec 6, 2012
I thought that C++0x made it possible for vectors to be initialized with an initializer list, such as:
Code: vector<vector<string> > vv {{"hello", "goodbye", ""}};
I tried this syntax in both VS 2010 & VS 2012 Express For Desktop, and I get the same error in both compilers:
compiler error: non-aggregates cannot be initialized with initializer list
To put the code above in context, I'm going to have a .txt file with hundreds of thousands of string arrays, in initializer list format, such as:
{"string","string","string","","",""},{"string","string","string","","",""},{"string","string","string","","",""}...and so on
The first 3 strings in each array will be non-zero in length, and the last 3 strings in each array will be empty, as shown above.
I want to be able to cut and paste the arrays right into the declaration, either with:
string arrayOfArrays[0][6] = {{"string","string","string","","",""},{"string","string","string","","",""},{"string","string","string","","",""}...and so on };
or
vector<vector<string> > vecOfVectors = {{"string","string","string","","",""},{"string","string","string","","",""},{"string","string","string","","",""}...and so on };
I know I can do the first, but apparently the second declaration method with vectors won't work. I would like to work with vectors, but I'm not sure about the initialization. The .txt file will be what it is, so the initialization will have to be able to work with its 'array-like initializer' format.
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Feb 12, 2013
I'm doing a project where I have to store information gathered (temperature and the time it was taken in seconds) in two separate vectors. After an unknown amount of data has been entered, and the end-of-file has been reached, I have to display the highest temperature and the time(s) it occured (bear in mind that the highest temperature may be recorded more than once). The output of that part should be as follows:
Highest temperature: 51
Recorded at time(s):
22:45
2:27
Something like that. The time should also be converted to hours and minutes. To the point: I've done some research on bubble sorting, but they only use it for arrays.
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Sep 20, 2013
I have to read data from a text file, load it into an array and then bubble sort it! Here is my code:
Code:
#include <iostream>
#include <string>
#include <fstream>
[Code]....
Basically what i am trying to do is that sort the names of 10,000 movies and then write those names to a text file. It gives an error in the nested loop by underlining arr and tells that no suitable conversion function from std::string to const char* exists.
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Nov 11, 2014
I need to make a program to calculate the business days (Monday-Friday) in a year in C. As example:
Input
2026
Output
261
I need to consider that the year could be a leap year and that every year can start with a different day. My Problem is that i dont know how to implement the right number of business days in C. I wrote down the business days in Excel for 2010-2040. I cant see any system behind it, some years have 261 business days, some have 260 or 262 but in no order.
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Apr 30, 2013
How would you search through the a list of vectors? I have a upper case letter at the start of the lists and corresponding lower case letters in vectors how would I search through it to see how many times the corresponding lower case letter was repeated?
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Aug 30, 2014
I'm trying to write a program that reads in from a .txt file the movie title, rating, director, actors etc. All I want to do is to just sort movie titles alphabetically and print all its attributes(director, actors). I tried using sort( movies.begin(), movies.end()) method, but it doesn't work.
here's my code btw:
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <algorithm>
#include <iterator>
#include "Movie.h"
[Code]...
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Dec 7, 2013
I am trying to write a program to sort the characters in a word alphabetically. For example, if you input 'what', the computer will sort it into 'ahtw'. But, it fails to work. I didn't know why.
Code:
#include <stdio.h>
#include <string.h>
main() {
[Code].....
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Aug 31, 2013
#include<stdio.h>
#include<iostream.h>
struct node {
int info;
struct node *next;
[Code] ....
I am getting runtime error in some cases. Sometimes the last input is printed. How to correct the code and display all elements in the linked list.
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Mar 26, 2014
I'm trying to make a c++ program of this but i don't know how to use the bubble sorting.
Write a C++ application that asks the user to enter 10 numbers. The program then stores those numbers in an Array. The program should display the Mean , Median, and Mode.
Mean is the average of the 10 numbers.
Median is the average of the 5th and the 6th numbers. (But you have to arrange the numbers in ascending order first using Bubble Sort before calculating the Median.)
Mode is the most frequent number among the 10 numbers.
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May 7, 2013
I previously tried to put strings in an array, but i couldn't modify the first index in the string that is in the array. I changed my code later.
[URL]
Suggest a function that sorts the inputs vertically according to the order given by the user? I made this one
void order(string order, char index[][15]){
int counter=0,line=0,i=0,j=0;
for(i=0;i<=15-1;i++)
{for(j=0;j<=15-1;j++) {
if(index[j][i]==order[counter])
[code].....
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Nov 11, 2014
My assignment is writing Madd Libs game. I still do not understand how to store inputted strings or values to arrays. I need explanation of collecting inputted data to arrays.
#include "stdafx.h"
#include<stdio.h>
//#include<string.h>
int main(void) {
char string[37] = {' '};
char adjective1[15];
[Code] ....
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Oct 9, 2014
can we pass two linked lists as argument in a member function to add two linked lists? and how to access them both in the function??
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Apr 29, 2013
I know how some parts of sorting linklist works but not all of it what does the rest of the code do
Code:
#include <iostream>
#include <math.h>
using namespace std;
struct linklist {
int data;
struct linklist * pnext;
[Code] .....
what does this part of the code do
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