C/C++ :: Read And Add Multiple Queue Together

Feb 21, 2014

Program requirements: Read two Queues (Male and Female) and pair them up.

Example:

inFile
M Bob
F Mary

outFile
Bob + Mary

Here is what I have so far. Code:

////////////////////////////main.cxx//////////////////////////

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <iomanip>
#include "queue.cxx"
using namespace std;
int main() {
ifstream inFile;
ofstream outFile;

[Code]....

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C++ :: Increase Sizes Of Queue In A Vector Of Queues And Find Shortest Queue

Feb 20, 2013

I have a paradigm in a loop of queues of a vector,if a condition is true,increase sizes of the queue of that particular queue in the loop of queues, if condition is false, the queuesize is left as such in loop of queues. After this operation i need to search the queue sizes of all queues and enqueue in the shortest queue.

I want to do something like the code given below

#include <vector>
#include <queue>
int min_index = 0;
std::vector<std::queue<int> > q
std::size_t size = q.size();

[Code] ....

How to implement this logic?

will q[i].size=q[i].size+5 increase the queuesize by 5 for the ith queue?

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C++ :: How To Get Code To Read Multiple Input Values

Feb 10, 2013

So I have to write a code for my C++ class, and I am having a problem trying to figure out how to get my code to read multiple int values. This is what my code should look like

Enter two times in military format (e.g., 1730 1520): 1730 1520
[1520<1730]
Enter two times in military format (e.g., 1730 1520): 1520 1730
[1520<1730]
Enter two times in military format (e.g., 1730 1520): 1730 1730
[1730==1730]
Enter two times in military format (e.g., 1730 1520): 1760 1520
1760: [INVALID TIME 1]
Enter two times in military format (e.g., 1730 1520): twelve 2
[INVALID NUMERIC INPUT]

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C/C++ :: Read In String With Multiple Words And Numbers?

Jul 23, 2014

I am trying to read user input for recipe ingredients which must include a ingredient name, and may include a quantity and a unit. Example: Stone ground flour 2 cups or Sugar 1 Tbsp or Milk. The problem I am having is that the string gets cut off after a space when multiple words are used for the ingredient name.

cin.ignore();
string line;
getline(cin, line);
istringstream record(line);
string name;
string name2;
int quantity = 0;
string unit;
record>>name>>quantity>>unit;

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C++ :: Strings - Read Multiple Values In On A Single Line

Jul 28, 2014

My question is on c++ strings. At the moment my program is reading input in one line at a time after the user presses enter.

I want to read multiple values in on a single line. Example: "apple banana orange end" ... How would I do this?

MAIN Code:
#include "Header.h"
#include "Orange.h"
#include <iostream>
#include <string>
#include <cctype>
using namespace std;

[Code] ......

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C :: Read From And Store Values Of Each Line In Multiple Variables

May 6, 2013

So I have this text file that I am trying to read from and store the values of each line in multiple variables. Let's say my text file contains

AXSYZ3482 Tom 100 112 and my code below here works fine when the lines in the text file is separated by spaces.

Code:

while (fscanf(fp, "%s %s %d %d
", userID, name, &startLoc, &endLoc) != EOF) {
printf("%s %s %d %d
", userID, name, startLoc, endLoc);
}

But let's say my file was to look like this instead.

AXSYZ3482:Tom:100:112

But if i try this below...

Code:

while (fscanf(fp, "%s:%s:%d:%d
", userID, name, &startLoc, &endLoc) != EOF) {
printf("%s %s %d %d
", userID, name, startLoc, endLoc);
}

It seem to store the entire line in userID including the ":". I want to ignore the ":"'s and store everything in between in respective varibles in the order specified above.

So first string in userID, then ignore the :, then second string in name, and ignore the next :, and so forth.

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C++ :: How To Read Multiple Elements In File To Parallel Arrays

Apr 19, 2013

I have a txt file that looks like this:

Student ID:97707; Grades: 87.73, 90.41, 91.74, 95.04, 99.13; Name:Davis, Artur
Student ID:23628; Grades: 58.09, 65.18, 68.62, 68.62, 98.05; Name:Davis, Susan
Student ID:49024; Grades: 18.37, 66.06, 68.07, 80.91, 96.47; Name:DeGette, Diana

-I need to read the id, grades and names;
-The id to a separate array
-The grades to a 2-d array
-And the names to a c style string.

Where do I start, im having trouble read the dummy to start

int main() {
char filename[15] = "ex.txt";
string names[MAX_NAMES];
double grades[MAX_ROWS][MAX_COLS];
int id[MAX_IDS];
int index = 0;
ifstream fin;

[Code] .....

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C++ :: Read Multiple Text Files And Count Occurrences Of Word

Jun 8, 2013

I am supposed to read(scan) data from a folder with multiple(21578) text files, and file names are numbered from 1 to 21578,and read each word that occurs in a text file, and count the number of times it occurs in the entire folder,i.e; in all the files how do i go about it? I've tried this so far..but it isn't working..

#include <iostream>
#include <map>
#include <string>
using namespace std;
void incrementString(map<string, int> &theMap, string &theString) {
if(theMap.count(theString)) {

[Code] ....

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C Sharp :: Regular Expression To Read Multiple Groups Of Text From TXT File

Mar 14, 2014

I have an EDI file whose structure is given below. This file has multiple records, each record contains a header (e.g EDI.DD.0000000001.20130809), then contents (i.e multiple paragraphs of text) and then footer (e.g End of Report/No EDI Activity). I have to read that entire file using regular expression using three groups.

I am using following regular expression to read the file.

(?<header>[A-Z]{3}.[A-Z]{2}.[0-9]{10}.[0-9]{8}) | (?<footer> (EndsofsReport|NosEDIsActivity)) |

(?<content>(?<=k<header>).*(?=k<footer>))

That expression reads the "header" and "footer" in respective groups properly but didn't pick the contents between header and footer in "contents" group.

I have changed the font of header and footer in below file to understand the format. I am using asp.net 3.5 framework.

//------------------Start of EDI File---------------------//
EDI.DD.0000000001.20130809

ORIGINATOR INFORMATION Company Name: UNITED HEALTHCAR Identification: 9024125001 Originating DFI: 002100002

RECEIVER INFORMATION Receiver Name: HEALTH & WELLNESS DFI Account Number: 0000000000000001 Receiving DFI ID: 434343430 ID Number: Transaction Type: 22 Deposit

ORIGINATOR INFORMATION Company Nam

[Code] ....

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C++ :: Read And Write Multiple Class Objects From File - Fstream Won't Work Correctly

Apr 28, 2014

So I have a small program which is supposed to write and read multiple objects from a file, but for some reason it doesn't write the information when I use "fstream" to create the object from the fstream class, but it does when I use "ofstream". Also, it doesn't read the information from the file no matter if I use "fstream" or "ifstream". I watched a video where this exact code worked just fine, but it just won't work when I run it. I'm using Dev C++ 4.9.9.2, I don't know if that has anything to do with it, I also tried it with Code::Blocks, didn't work either.

Here's the code.

#include <iostream>
#include <fstream>
using namespace std;
class Person

[Code].....

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Jul 31, 2014

I want to develop an application which can host multiple views of explorer (window), where as each window is totally separate from others. So that I can have multiple desktop views through my single explorer. Any built in feature in .NET ?

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C/C++ :: How To Make Multiple Subroutine And Return Multiple Arrays

Aug 17, 2014

how to make subroutines and return multiple arrays.Before that, i wrote my program on matlab. could my program to be structured as following?

<header>
initial value of program;
subroutine1() {
calculating the first work;
return 2 or 3 arrays;

[code].....

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C :: Redirecting Multiple Pipes With Multiple Children

Mar 21, 2014

I've been working on a function that works like a pipeline of a shell but receives a directory, go over it an search for every file to send it to a filter, something like this in bash "cat dir/* | cmd_1 | cmd_2 | ... | cmd_N", The only problem i have with the code is the redirection of the pipe descriptors.

Code:

int main(int argc, char* argv[]){
char** cmd;
int Number_cmd;
cmd = &(argv[2]); /*list of cmds*/
Number_cmd = argc-2; /*number of cmds*/
}

[code]....

The code is seems to work fine except when i run it with more than one command in example ("./filter DIR wc rev") in this case it returns

wc: standard input: Bad file descriptor
wc: -: Bad file descriptor
0 0 0

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C++ ::  Multiple Files Causes (Multiple Definition) Error?

Jul 15, 2013

I'm using multiple C++ files in one project for the first time. Both have need to include a protected (#ifndef) header file. However, when I do that, I get a multiple definition error.

From what I found from research, adding the word inline before the function fixes the error. Is this the right way to do this, and why does it work? Should I make a habbit of just declaring any function that might be used in two .cpp files as inline?

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C/C++ :: Priority Queue Without STL

Nov 28, 2014

How to build a FiFO queue without using the STL (done that no problem), get it to dequeue (again, done that no problem). However, to get those extra marks, I need to be able to order it using a priority system.

I've tried ordering the NodeDequeue class that I'll show at the bottom of this post, but I just cannot get it to order appropriately. The closest I have got is everything in order but I lose a Node from the memory completely. So, that's no good.

The most logical idea I have thought of right now is to send the largest number to the back of the queue each time it's iterated, eventually, the largest number will end up at the front.

class PriorityQueue : public Queue {
public:
Node* NodeDequeue(void) {
Node* tmp = front;
Node* seek = tmp->getPrev();

[Code] .....

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C :: Removing Item From A Queue

Aug 17, 2014

I'm having a problem with removing an item from a queue. At first in the debugger I got SIGTRAP but I don't get it anymore but the problem still exists. When you try to remove an item from the queue the first nothing happens. Here's the code below compile it and you see what I'm talking about.

Code:

#include <stdio.h>
#include <stdlib.h>
struct Node {
char let;
struct Node *nextNode;
};

[code]....

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C :: Display The Names In A Queue

Mar 12, 2014

I have an assignment that needs to display the names of customers to be served according to a sequence. coding to display the names accordingly?

Code:

#include <stdio.h>
#include <stdlib.h>
#define MAXIMUM 20
void create();

[Code].....

This is my output. I have trouble displaying the names of the customers as it outputs null when I try to display my position in queue.

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C++ :: Not Marking That The Queue Is Full

Apr 11, 2013

Why is this code not marking that the queue is full.. I'm just including my Add function that verifies if they want to add another number to the queue. The isFull function works fine, have used it on other programs.

template <class T> //Template currSize function
int Queue<T> :: currSize ()
{
return (rear - front + arraylength) % arraylength; //

[Code].....

The output goes all the way down to 1 spot left, lets the user enter the last element. Then it asks if they want to add another.. At this point, when they hit Y, it lets them add it and it says there are 5 spots left!

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C++ :: Decrease Key In STL Priority Queue

Jan 19, 2013

I'm trying to implement Prim's Algorithm and for that I need to have a decreaseKey method for a priority queue (to update the key value in a priority queue). Can I implement this in the STL Priority Queue?

This is the algorithm I'm following:

for each vertex u in graph G
set key of u to INFINITY
set parent of u to NIL
set key of source vertex to 0
en-queue to priority queue Q all vertices in graph

[Code] .....

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C++ :: How To Resort Priority Queue

Nov 4, 2013

I've got a priority queue of items who, from time to time, returns a different comparison result. Any way to re-sort a priority queue who is storing them?

Example:

#include <cstdlib>
struct Random {
bool operator<(const Random&) const { return !(rand()&1); } };

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C++ :: Passing Object By To Queue

Dec 4, 2013

I've been working on a little project and hit a snag. I'm using nodes for a queue and stack class that were created using an existing list node class. I create an object for a student class and I want to enqueue that object.

int main() {
Queue sLine;
Customer stu;
Queue<Student &>
cLine.enqueue(cust);
}

That's basically the coding of it in main. However when I follow the error which says uninitialized reference member ListNode<Student& info>::data;

#ifndef LISTND_H
#define LISTND_H
template< class T > class List;
template< class NODETYPE >
class ListNode {
friend class List< NODETYPE >;

[Code] .....

What I may have been doing wrong? Trying to work within certain contexts.

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C++ :: Creating STL Queue Of Arrays?

Dec 3, 2013

Is there any possible way to create an STL queue of arrays? I tried

queue<int[]>q;

It didn't work?

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C++ :: Empty State Of Queue?

Feb 18, 2013

what is the empty state of queue?

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C++ :: How To Start A Printer Queue

Nov 30, 2014

Write a program to simulate a printer queue (priority queue or heap – Bentley article has code) where 3 printers are “fed” by this queue. Each print job has an unchanging priority and higher priority jobs go first (although once started, a job isn't stopped to let a higher one go). For each unit of time, there is a 26% probability that a job will be added to the queue and all jobs take 8 time units to complete. Print job priorities are between 5 and 100. The queue opens 20 time units prior to the start of printing for adding print “jobs”. A print “day” is 1000 time units. The output from your program is:

1) A list of jobs completed with their priorities for each printer

2) A list of jobs not completed (if any).

#include <iostream>
#include <cstdio>
#include <cstring>

[Code].....

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C++ :: 2 Queue With Linked List?

Dec 6, 2014

while the prog. running compiler say " access violation .. "

this my code ...

solved :just forget to make r=NULL ; rf =NUll ; frontm=NUll; frontf=NULL ;

#include <iostream>
#include<conio>
struct stu{
int id;
float gba ;
char gender ;
stu *next ;
}*r ,*rf ;
stu read()

[code]....

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C/C++ :: Display Names In A Queue?

Mar 13, 2014

I have encountered errors when trying to display the customers' names in a priority queue.

#include <stdio.h>
#include <stdlib.h>
#define MAXIMUM 20
void create();
void priority_insert(int data);
void check(int data);

[code]....

I have gotten the following output:

Peter
Peter
<Null>

How do I correct my coding to display like below:

John
Peter

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