C++ :: Two Vectors Of Float - Sorting In Reverse Order?
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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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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Aug 7, 2014
I'm trying to use a priority queue sorting in reverse order to take a vector or 2d array. The problem is that I want to sort by the vector/array cell value but keep the reference to the vector/array index of the value. I don't know quite howto keep them both related so when I pop. I can find the corresponding cell.
priority_queue<int, vector<int>, greater<int> > Open;
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May 25, 2014
I had been tasked to create a program that reverses a word i.e.
cat
tac
How to make my program non case-sensitive using vectors?
Code:
// BackWardsSentence.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
string BackWords (string sentence);
int BackSentence (string sentence);
string BackWords1 (string sentence);
[Code] .....
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May 14, 2014
How to print a string in reverse order(for example: "today is Wednesday " to "Wednesday is today"). My professor said we should begin with a null string and build it one word at a time.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int nwords(string);
[Code] .....
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Sep 21, 2013
I suspect that C++11 would make it possible to declare high rank vectors such as Code: int N = 15; // chosen arbitrary rank vector<vector<vector<...<vector<double>>>>..> vec; // N layers of nested vectors Is there a way to declare such a vector of rank N (given a fixed integer rank N)?
Heuristically I would like to write the declaration like this: Code:
vector<double> A;
vector<A> vec[0];
for(int i=1; i<N; i++)
{
vector<vec[i-1]> vec[i];
} Is there a way to use the new variadic templates to make this work?
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Jun 3, 2013
I need to do program where i will input sentence and then output it in reverse order. Example: today is Monday ----> Monday is today. So I have this:
#include <iostream>
#include <cstring>
using namespace std;
int main() {
char niz[20],niz2[20];
int lenght,k=0;
[Code] ....
For output I only get one word of sentence,example: Monday is today--->today and nothing else.
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Nov 5, 2013
works fine without the for loop.... if i use for loop...it doesnt give the output...
Code: #include<iostream>
#include<conio.h>
#include<fstream>
[Code]....
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Sep 24, 2013
The next step for my project is to take data from a file, and create a new file with the same data, but in reverse order. If a file has the following values:
1
2
3
4
5
The program should create a new file with the following values:
5
4
3
2
1
Seems pretty straight forward, yet I am hitting a snag when I try to compile my program:
Code:
#include <stdio.h>
#include <assert.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
[Code] ....
The following errors occur when I try to compile the fore mentioned code:
intrev.c: In function 'main':
intrev.c:25: warning: unused variable 'out'
intrev.c: At top level:
intrev.c:39: error: expected identifier or '(' before 'while'
[Code] .....
Now I am not concerned with "unused variable 'out'" as it is used, just in a for loop. Is this a problem?
I'm not entirely sure why it's giving me the error at line 39. I've gone over this a couple times and it doesn't look like I've missed any methods which need to be closed. Maybe I've missed something?
I'm also not sure why I am getting an error when I try to close the opened files. I've done this before in the same manner, but without errors. Not sure why I am now, but my guess is that it has something to do with the error on line 39.
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May 3, 2014
I was trying to reverse a linklist in reverse direction using the recursion. I was able to reverse n - 1 element but it is not printing the first one. Below is my code.
Code:
typedef struct linklist {
int data;
linklist *next;
};
void add(int data,linklist **node) {
[code]....
This is happening since recursion is starting from second node, which is due to reason not printing the first one when recursion print values from stack once
node != NULL
Condition is met.
Currently I am using below statement for printing the first element;
reverse_recur(node);
printf("
Print In Reverse Order
%d
",node->data);
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Jan 5, 2015
Need to correct the errors. i've done so far.
#include<iostream>
#include<fstream>
#include<cstdlib>
#include<iomanip>
using namespace std;
int main() {
ifstream fin; char ch; int size=0;
[Code]...
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Dec 1, 2014
I need fastest method to reverse order of bytes in my char array.
For example i have:
unsigned char buf[8];
// consider data stored in buf is 88 77 66 55 44 33 22 11
// how to reverse it to: 11 22 33 44 55 66 77 88
// currently i can do it by equal assignment , i make another buf like:
unsigned char buf_ok[8];
[Code] ....
// This does reverse the bytes as i want but its very slow , i am looking for fast method ..
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Apr 4, 2013
Any really simple way of converting the following float to a string so I can take strlen()?
float a = 53213421;
strlen(a)?
I have looked up solutions but they are either too long or they confuse me.
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Apr 2, 2012
I am trying to write a program that takes a sentence and reverses the word order.
For instance This is a Bird would become Bird a is This
Code :
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main (void) {
char input_buffer[1024];
char middle[1024];
[Code] ....
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Apr 6, 2013
1. Construct a class diagram that can be used to represent food items. A type of food can be classified as basic or prepared. Basic food items can be further classified as meat, fruit, veg or Grain. The services provide by the class should be the ability to enter data for new food, to change data for food and to display existing data about food.
using this class definition write a main program to include a simple menu that offers the following choices:
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2. Modify Food
3. Delete Food
4. Exit this menu
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Oct 25, 2014
I should sort an array of mixed float and integer numbers by merge method, and using the pointers to sort that mix array. how to use pointers to sort those different type of data.
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Nov 2, 2014
I've a vector of objects that I can get my float value from by accessing it through a method.It's not a pointer of vector of objects though.
Meaning it's something like vector[i].getFloatValue().
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Sep 29, 2013
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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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Apr 21, 2013
Write a for loop statement to print the numbers from 1 to 10 in reverse order separated by star :
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i try to do it but it show me like this :
10*9*8*7*6*5*4*3*2*1*
how do i write to show me like the first one ?
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Nov 29, 2014
Implement a recursive function named void printBack(DoublyLinkedNode<T>* node) for the class DoublyLinkedCircularList which will print out the elements in the list from back to front. The function is initially called with the first node in the list. You may not make use of the previous(prev) links
This is my solution where I got 2 out of a possible 3 marks:
template<class T>
void DoublyLinkedCircularList<T> :: printBack(DoublyLinkedNode<T>* node) {
if(node->next == NULL) //Correct- 1 mark
return 0;
else
printBack(node->next); //Correct - 1 mark
cout << current-> element << " ";
}
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Jan 28, 2014
Using the array to accept 10 testscore. Calculate and print the highest, lowest, fifth test score entered and all the test score entered in reverse order.
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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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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
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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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Jan 30, 2013
I have a code right here that i worked on with my teacher. I can say that he did most of the work. Basically i'm sorting elements in a dictionary order.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXWORD 50 // max word size
void swap(char **p, char **q) // Q1: Why do I need a double pointer?
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Nov 15, 2013
This program I am trying to write has a structure of persons with a first name last name and age for each.
What I need it to do it display the order of the persons before sorting and then display the persons after sorting by age.
So far I have written the overall program but am stuck at the most important step...which is defining the functions that will be doing all of the work.
For sort_by_age I want use bubble sorting by writing the function myself and for print_person_info I am confused on how to print data out of the struct.
Code:
#include <stdio.h>
struct person
{
char first_name[20];
char last_name[20];
int age;
};
void print_person_info(struct person clone);
void sort_by_age(int n, struct person a[]);
[Code]...
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Feb 17, 2015
I want to sort a vector int in ascending order, but when I test, the output isn't correct - the vector is still unsorted. Am I calling it incorrectly?
int sorted (vector <int> a) {
int size = a.size();
sort(a.begin(), a.end());
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