C++ :: Declaring Parallel Arrays As Functions
Oct 23, 2013
i'm facing some problems with the array, as I have my .h and .cpp files so do i declare them as per norm of how we usually declare a function?
pointtwod.h
class PointTwoD {
private:
int xcord,ycord;
float civIndex;
LocationData locationdata;
[Code] ....
when i compile the error message i get was even when i i put in int xord[]; in my PointTwoD.h file:
PointTwoDImp.cpp:99:6: error: prototype for 'void PointTwoD::storedata(int*,int*,float*) does not match any in class 'PointTwoD'
PointTwoD.h:48:8: error: candidate is: void PointTwoD::storedata(int, int, float)
PointTwoDImp.cpp: 135:22: error: 'xord' was not declared in this scope
PointTwoDImp.cpp: 135:27: expected primary-expression before ']' token
PointTwoDImp.cpp: 135:30: error: 'yord' was not declared in this scope
PointTwoDImp.cpp: 135:35: expected primary-expression before ']' token
PointTwoDImp.cpp: 135:38: error: 'civ' was not declared in this scope
PointTwoDImp.cpp: 135:42: expected primary-expression before ']' token
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Mar 10, 2014
I am trying to learn about parallel arrays and files. I believe that I wrote a program that properly writes the data of the arrays into a file, but I am not quite sure how to take the next step and make a second program by bringing in the file I created and reading the information of the file back into two arrays to display them.
Code:
#include<iostream>
#include<fstream>
#include<string>
usingnamespace std;
[Code] ....
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Mar 31, 2015
#include <stdio.h> /* fopen, fclose */
#include <stdlib.h> /* exit function */
#include <string.h> /* string library */
#define STRSIZENAME1 41 /* length of name */
#define STRSIZENAME2 100 /* amount of names */
#define STRSIZEAGE 100 /* amount of ages */
/* Name: main */
int main(int argc, char* argv[]) {
[Xode] ....
This is the code I have so far. The goal of the assignment is to sort two parallel arrays, one with names and another with their ages, at the same time to alphabetize them. I am stuck with trying to pull the data from the file itself and concatinating it. I have searched ways to do so and this is the best I understood. So the error is it will get me the first person's name, but it won't get the age and move to the next line in the file. It just keeps repeating the same thing and I can't figure out why.
I attached the sample file with names and ages to view the format of the text file itself.
PS the other defined variables are used later for sorting the data. right now I am just trying to get the data itself and put it in an array but between my book and the internet I can't seem to store the data properly. That is also why I am printing it in the while loop as well so I can see what my arrays look like but I will take that out too once I know the data is good
Attached File(s)
peoplefile.txt (157bytes)
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Apr 24, 2013
I'm working on a parallel Fortran program by using MPI, which calls a very good random number generator function from C (drand48 and srand48 for seed).
My Fortran program file "Par_PICFort_4.f95" is smt. like:
Code: PROGRAM main
IMPLICIT NONE
Include 'mpif.h'
[Code]....
I compile the code as: Code: mpif77 -o PIC Par_PICFort_4.f95 drand48.c Program seem to be running, but after checking the simulation results, I see that drand48 is not working in a parallel way. Creating independent random numbers which different seeds is very important for me.
Question: Is it possible to run the drand48.c file as parallel?
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Nov 3, 2014
I have trouble reading data from a text file to parallel arrays. the text file (album.txt) has this format:
Code:
(song1 title)
(song1 artist)
(time1)
(song2 title)
(song2 artist)
(time2)
.
.
etc
I want to store these data into three arrays:
title [], artist[], time[] this is what I have so far:
Code:
#include <stdio.h>
#include <string.h>
#define SIZE 9999
int main ()
{
FILE *tFile;
char title[SIZE];
[Code]...
the problem is that each array reads the whole text? I want to store artists name in char artist[] .. titles in char title[] and so on
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Apr 8, 2015
I am attempting to reconfigure a working code that before used while loops and if statements to convert a numeric score to a letter grade. I now wish to take this same code however I want to change the char convertGrade(int numScore) to simply use a parallel array as a replacement to the if statements.
The array needs to consist of 3 arrays of fixed size 5:
int minScores[SIZE]
int maxScores[SIZE]
char letterGrade[SIZE]
I know the declarations need to go in the function convertGrade but this is the first time I have worked with arrays and I am having trouble trying to figure out how this array will replace my previous if statement.
In order to access the array elements I need to write specifications such as
minScores[i]
maxScores[i]
letterGrade[i]
(where i = 0, 1, 2, 3, or 4)
#include <stdio.h>
#include <stdlib.h>
#define SIZE 5
int getScore(void);
char convertGrade(int numScore);
[Code] .....
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Apr 14, 2014
So the point in this code is to promt the user to enter a product ID. It then should search the ids array and display the corresponding price and quantity from the prices and quantities arrays. I'm sure this is quite simple but I am new to programming and having trouble understanding arrays. All it is doing is giving me the first subscript when I input a -1.
//Advanced34.cpp - displays the price and quantity
//associated with a product ID
//Created by Scott Knight on April 12, 2014
#include <iostream>
using namespace std;
int main() {
//declare arrays and variables
int ids[5] = {10, 14, 34, 45, 78};
[code]......
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Aug 17, 2013
I am having a problem with my program to calculate the GPA of a student. The problem that I am having is that I am not able to get my Total Point Value to display the sum of the two arrays. The multiplication for the array is correct and will display correctly, but instead of putting the total into the accumulator it will display the totals in a column. I have tried moving the coding for the calculation out of the loop that converts the letter grade into a point value,and placing it in it's own loop, but I still get the same display output. Below is the code that I have so far. I still have a few elements to add to the code, but they will be easy once I get this display to work right.
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
// Global const
// prototype
int main () {
// Varialbes, Arrays
[Code] ....
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Apr 4, 2014
Class programming project where we declare two arrays, a sting array containing the names of the boroughs and an int array which which holds accident number for each borough. The main function calls getNumAccidents() function to fill the array. it then calls findLowest() to learn which borough had the fewest accidents. It should print out the accident numbers for each borough and then out the borough and accident number with the fewest accidents.
I'm able to get the program to kind of work. When I run it everything works fine but I am not able to get the arrays to sort and match up correctly..
#include<iostream>
#include<iomanip>
#include<string>
#include<cstring>
using namespace std;
class combineSort {
public:
combineSort() {
[code]...
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Dec 8, 2013
I have an external file that I would like to read from this file and place the values into parallel arrays. The file has these values:
Rams
Titans
23
Patriots
Rams
20
Steelers
Seahawks
21
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Sep 9, 2014
see these sample:
Code:
#include <iostream>
#include <string>
using namespace std;
class test{
public:
virtual void ola() {
[Code] .....
Like you see, i don't re-declare the 'ola' function in 'test1' class, only in 'test' class. The compiler tell me the 'ola' isn't member of 'test1'. in 'test' i put it 'virtual', but forgetting that, how can i override it without re-declare it?
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Nov 10, 2014
I have a .txt file that I need to input into two parallel arrays. The first array needs to be on dimension and the second needs to be two dimensions.
This is a sample from the .txt file:
Australia62.762.163.359.7
Austria052.853.154.6
Belgium30.430.327.525.3
Canada61.356.257.754.5
Chile026.425.431.1
CzechRepublic038.327.325.2
Denmark65.067.162.355.0
Estonia51.732.929.834.3
Finland55.242.942.143.3
France35.728.330.228.8
Germany56.447.242.646.6
Greece30.326.925.013.1
Hungary032.521.818.6
Iceland068.271.666.0
this is what I have for code so far:
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
const int SIZE = 40;
const int COLUMN = 5;
void getData(ifstream& inf, string n[], double tstData[][COLUMN], int count);
[Code] .....
when I compile and run the code and have it display it does not read the first item into the 1-d array, instead it appears to read the 4th number from the left into the 1-d array and then into the second spot in the 2-d array, then again in its proper place and finally it has this number repeating through the rest of the arrays:
-92559631349317830000000000000000000000000000000000000000000.00 followed by the number 59.7 from the .txt and the long number again.
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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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Oct 30, 2014
I've been working on an assignment that deals with newspaper advertisements. I have two arrays:
categoryCode (the code for the advertisement's category such as pets, cars, etc) and
numWords (number of words in the ad).
The arrays are dynamic.
My assignment has the category listed each time there is an ad associated with it and then its number of words for that ad. If this were a real-world issue I would want my output to list each category only once despite how many ads were in it, list how many individual ads are in the category, and its total number of words for the ads in that category. When using parallel arrays, is there a way to do this?
Let's say I have categoryCode with three elements {5, 5, 7} and numWords {10, 12, 15}.
How would I make the numWords add together only when the categoryCode values are the same?
I would want the output to print:
Category 5 Ads 2 Words 22
Category 7 Ads 1 Words 15
rather than how my instructor is having us do it like this:
Category 5 Words 10
Category 5 Words 12
Category 7 Words 15
I think I'm getting hung up because my mind is confusing the element's location in the array with the element's actual value and I'm probably making this harder than it should be. How would I compare the categoryCode values in a dynamic array? If it were a fixed size I think I could just compare categoryCode[0] to categoryCode[1] and so on, right? But in this case I'm not sure how I would go about that.
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Apr 6, 2013
I am looking at functions still and can't see the point in declaring the function at the top of the program, and then defining later i.e.
Code:
#include <iostream>
int add (int x, int y) {
return x + y;
[Code] .....
I obviously don't have much real world experience with this and am interested to see where declaring and defining later would be useful and/or beneficial.
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Jul 30, 2014
In pseudocode and in C code, declare two 1-dimensional parallel arrays of Integers to store the age and weight of a group of people that will hold the information of up to 10 people. Use a For loop to iterate through the array and input the values. This is the code i have, but my array is showing up as 11 and not 10?
Code:
#include <stdio.h>
int main() {
//Define Variables
float Age_Data[10],Weight_Data[10];
float Age_Input,Weight_Input;
[Code] .....
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Oct 23, 2013
I'm just wondering, why you have to set the length of the inner arrays declaring a function. In which moment does the code needs to be sure about the length of the inner arrays accessing an cell?
I came up with this question realizing the elements of the outer array beeing pointers to the first value of each inner array. Therefore I can access e.g. the first first element of the second inner array like this:
**(arr + 1) ...regardless of the length of any array to my mind.
parallel post: [URL]...
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Apr 1, 2014
According to [URL] ....
" char myword[] = { 'H', 'e', 'l', 'l', 'o', ' ' };
char myword[] = "Hello";
In both cases, the array of characters myword is declared with a size of 6 elements of type char: the 5 characters that compose the word "Hello", plus a final null character (' '), which specifies the end of the sequence and that, in the second case, when using double quotes (") it is appended automatically."
However there are examples where word array is declared as :
char myword[] = { 'H', 'e', 'l', 'l', 'o' };
Is syntactically correct?? If yes, what is the size of myword? and does ' ' append by compiler automatically?
And is char myword[] = "abc" same as char myword[] = {'a','b','c',' '} or is it same as char myword[] = {'a','b','c'} ??
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Mar 31, 2013
We are learning how to use composition. In this project there is the Main (), resistor .cpp and .h, capacitor .cpp and .h, and filter .cpp and .h. I have 4 arrays built in the resistor.cpp that I want to print through the main(). I put the arrays in the constructor and have watched them initialize with the proper values, but as soon as the program leaves the constructor the values are wiped away and the elements are left with the value " -858993460 " in all of the them.
Here is the code:
Filter Main()
#include "Capacitor.h"
#include <conio.h>
#include "Filter.h"
#include <iostream>
#include "Resistor.h"
#include <windows.h>
#include <iomanip>
[Code] .....
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Jan 23, 2012
I'm picking up C++ by translating java code to C++. I have the completed code in java and it works perfectly. I'm not going to paste the whole code, this is a part of what I have:
Code:
class Graph
{
final int MAX_VERTS = 20;
[Code]....
I know it looks almost exactly the same as its java counterpart. I have several sources opened, but it's all bits and pieces of what I need.
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Feb 9, 2013
I'm creating a program to read information about class schedules at my school, reformat the information, and allow the user to search for specific semesters. There are eight fields of information. I'm reading the info from a text file using eight parallel arrays, but I'm having trouble declaring the arrays. I can run this code in one compiler (Dev-C++) with no problems, but I get errors when trying to compile it using Visual Studio stating that arrays must be declared with a constant value. I have a loop to run through the text file, with a counter to increment with each subsequent line, then I create a constant int equal to the counter, and declare the arrays of size equal to the constant int. Here's the section of code in question:
// Counting the number of lines in the text file
inFileForLines.open("CIS225HW1DA.txt");
string countLine;
int numberOfLines = 0;
//Discarding the first line of the text file containing only column headings
getline(inFileForLines, countLine);
[Code] .....
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Sep 23, 2014
I have read about it in my book and also on this website but i still have things uncleared....
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Jun 12, 2013
how to create functions with arrays :/
You have to write a single C program that creates a one dimensional array of size MAX(to be declared as a declarative constant using directive #define MAX 10), initializes its elements with a given value using the function InitArray, then populate the array with some random numbers between 1 and MAX inclusive, and finally search the array for certain keys.
The structure for this C program is as follows:
int main() {
//array A to be locally declared here
int
size = MAX;
}
[code]....
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Nov 4, 2013
i have a program that works, but now I am trying to get function1() to work. What it has to do is bring in the array and populate it with random letters. I don't know much about functions.
Code:
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define maxrow 20 //defines maxrow as a constant of 20
#define maxcol 30 //defines maxcol as a constant of 30
}
[code]....
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May 21, 2014
I'm truing to write a function that gets an array of arrays, and returns an array. I placed the code I'm using below, but I'm getting all kinds of errors. How is the right way to do this?
static void Main(string[] args) {
int[] draw1 = new int[] { 5, 8, 3 };
int[] draw2 = new int[] { 3, 6, 8 };
int[] draw3 = new int[] { 6, 7, 9 };
int[] draw4 = new int[] { 5, 6, 0 };
[Code] .....
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Mar 31, 2015
I can write code that can sort arrays with Bubble, Selection and Insertion algorithms but I'm not sure how to have them be called and return a value 3 different times with 3 different sizes. For example, I need it to return 10, 100 and 1000 but I'm stuck.
#include <stdio.h>
void selectionSort (int list[], int last);
int main()
[Code].....
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