C :: How To Traverse Array Which Holds 3000 Numbers

Oct 23, 2013

I have this array which holds 3000 numbers and is initialized by assigning a random number to each element.

Code:
#include <stdio.h>
#include <stdlib.h>
int main (void)
{
int x[3000] = {rand()};
return 0;
}

I have to traverse this array so that each random value lies between -3000 and +3000 inclusive.I'm not sure how to traverse this, there is nothing in my notes discussing traversing.

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C :: Declaring And Initializing 3000 Number Array?

Oct 23, 2013

Here are the steps to this program:

1. Declare an array that will hold 3000 numbers
2. Initialize this array by assigning a random number to each element in the array
3. Traverse the array, modifying the current contents of each element in the array so that each value now lies between -3000 and 3000 inclusive
4. Traverse the array to compute the average value of all elements

I have never worked with arrays before and am lost!

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C++ :: Employee List That Holds Information - Add Or Delete Array?

Mar 26, 2013

So I'm trying to make an employee list that holds the information so I can then delete or add from that array. I'm getting some errors regarding overloading function.

#include "employeelist.h"
const Employee & employeelist::operator [](int index) const {
return ( (this->Employees)[index] );
} Employee & employeelist::operator [](int index) {
return ( (this->Employees)[index] );

[Code] .....

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C++ :: List Library - How To Traverse Through A And B

Aug 22, 2013

I'm trying to make a list that contains other lists. I want to use the <list> library /not my own implementation/. Here is what I do:

list<list<int>> Lists; //I create the main list
list<int> A, B; //Then I create the other lists
//After I fill them with data I add them to the main list
Lists.push_back(A);
Lists.push_back(B);

The problem comes when I try to go through A and B. I make an iterator of the main list:

list<list<int>> Iter = Lists.begin();

Then I need to make an iterator to traverse through A and B. But I can't make it. I do this:

list<int> Iter2 = Iter.begin() //But the compiler says it is not possible

How can I traverse through A and B?

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C++ :: How To Use Pointer To Function To Traverse The List

Nov 26, 2014

i am having trouble figuring out inorder traversal in this assignment. I was given this function definition in the homework i have to declare it. The problem i am having is how to use pointer to function to traverse the list.

void CBSTree<NodeType>::InOrderTraversal(void (*fPtr)(const NodeType&)) const;
void CBSTree<NodeType>::InOrder(const CTreeNode<NodeType> *const nodePtr
,void (*fPtr)(const NodeType&)) const;
//nodePtr is a pointer to a NodeType object (this is a recursive function, initially this points to the root).
//fPtr is a pointer to a non-member function that takes a const reference to a NodeType object as input, and
//returns nothing

I know without the pointer to function parameter it will be like this.

void InOrder(CTreeNode *nodePtr)
{
if(nodePtr != NULL)
{
InOrder(nodePtr->left);
cout<<nodePtr->value;
InOrder(nodePtr->right);
}

[Code]...

I just don't know how to traverse inorder with the function definition i am given.

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C++ :: Segmentation Fault When Trying To Traverse Tree

Jul 15, 2013

I am currently working on a Huffman code program for one of my classes. I have gone all the way up to the point where I have created a tree but when I try to traverse it, the program crashes and says there is a segmentation fault. After running the debugger, the error occurs when I try to traverse to the left node (Line 170). The code I have below is not completely finished, I ran across the issue while testing to see that it works. See the code below:

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <vector>
#include "Node.h"
using namespace std;
void fillList(char* sent, int size, vector<Node> &vec);

[code]....

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C++ :: Vector In Header That Holds One Of Other Classes?

Jan 10, 2015

I can not seem to add a vector to my head file. I have tried many things and can't figure it out.

Compile and Compile error -

g++ -Wextra -pedantic -std=c++11 Card.cpp Card.h Deck.h Deck.cpp unit_test1.cpp ;
Deck.h:15:27: error: invalid declarator before ‘deck’
void std::vector<Card *> deck;

[Code]....

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C++ :: Destructor For Class That Holds Pointer To Object

Mar 20, 2013

Lets say we have a class that holds a pointer member to another object. If I delete that pointer in the destructor I get an error (and I understand why). My question is : is it possible to overcome that without memory leaks ?

1 #include<iostream>
2 using namespace std;
3
4 class A {
5 public:
6 ~A() {
7 cout<< "~A()" <<endl;

[Code] ....

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C++ :: Calling A Function That Holds Struct Arrays

May 16, 2013

In this program I am attempting to allow a user to input three different authors and then input three books they have written as well as the price. I am struggling with calling the functions and am not sure what to do.

#include <iostream>
#include <string>
using namespace std;
struct BookInfo{
string bookTitle;
double price;

[Code] ....

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C/C++ :: Implementing Container Class That Holds Point Class

Nov 28, 2014

I have a Point class that's already implemented. My goal is to implement a container class called Line that holds the Point class. I'm not allowed to use any existing container classes for this. Here's what I'm working with:

//File: Point.h
#ifndef POINT_H_
#define POINT_H_
class Point {
public:
Point(int x = 0, int y = 0);
Point(const Point & t);
virtual ~Point() {};

[Code] ....

How I'm supposed to write Line.cpp...how do I access/add Points to Line without using something like a vector? I probably should've included what I've written so far.

#include "Line.h"
/**
* Default Line constructor
*/
Line::Line() {

[Code] ....

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C++ :: Find Prime Numbers Between Given Pair Of Numbers And Store Them Into Array?

Apr 18, 2014

Find all the prime numbers between a given pair of numbers. Numbers should be read in from an input file called "numbers.txt" and find all the prime numbers between them. Store the prime numbers in an array, then sort the array from greatest to least. Display the array before and after the sort.

I'm stuck on how to put the prime numbers into an array.

The input file has the numbers 1 & 100.

Here's what I have so far.

#include <iostream>
#include <fstream>
using namespace std;
int main() {
ifstream fin;
fin.open("numbers.txt");

[Code] .....

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C :: Find Duplicate Numbers And Numbers Found Once In Array

Dec 7, 2013

Question: How to find a duplicate numbers and numbers found once in array.

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C/C++ :: Generate Combinations Of Numbers From 1 To 25 In 15 Numbers Array?

Sep 21, 2014

The code below will generate combinations of numbers from 1 to 25 in an 15 numbers array. The only filter I've applied is that the sum of all the numbers in the vectors divided by 15 needs to be between 13 and 14.
I would like to count how many consecutive numbers there are in one combination, so that later i can apply another filter.. for example:

1 3 4 5 6 8 10 13 14 16 17 18 19 20 25

3 + 4 = 1
4 + 5 = 1
5 + 6 = 1
13 + 14 = 1
16 + 17 = 1
17 + 18 = 1
18 + 19 = 1
19 + 20 = 1
_____________

Count = 8, in this case..

I think it's not very difficult to do, but i just can't see how to do it.

#include <iostream>
#include <vector>
#include <numeric>

[Code]....

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C++ :: Storing Numbers Into 2D Array - Invalid Types Int For Array Subscript

May 17, 2014

#include <iostream>
#include<fstream>
int decryption(int);
int multiply(int,int[][2]);
using namespace std;
main(){
int n;
ifstream inFile;
inFile.open ("out.txt");

[Code] .....

I was trying to store numbers read from a text file into 2D array but I am getting the error above.here is where the error occurs:

line 33: cout<<m[i][j]<<" ";

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C++ :: How To Count Same Numbers Once In Array

Jan 22, 2015

iam trying to count the same numbers in an array just once like

38
38
40
38
40
37

the output should be 2 since 38 is repeated and 40 too but for my code the output is 3 thats an example of how it should be in a nutshell i want same number to be counted just once in the whole array

and here's my code :

#include <iostream>
using namespace std;
int main(){

[Code].....

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C++ :: Array With Both Numbers And Alphabets

Aug 22, 2014

I am unable to create an array which has to content elements(1E, 2E, 3E, 4E). I tried using char however I am unable to display as it only shows the letter E.

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C++ :: Find GCD Of Array Of Numbers

Aug 25, 2013

I wrote this GCD function to find gcd of an array of numbers . Here is the code:

long long GCD(long long min,int loc,long long b[]) {
for (long long i=min;i>0;i--) {
bool p=0;
for (long long x=0;x<loc;x++) {
if (b[x]%i!=0)

[Code] ....

Its returning wrong answers. When i tried 6 14 it returns 6

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C/C++ :: Get Average Of Numbers In Array

Jul 5, 2014

I was trying to make a program that asks the number of grades, get the grades and then get the average. I know I have to save the grades in an array but i don't know exactly how.

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C :: Ignore Negative Numbers In Array

Feb 15, 2014

So i have this program that takes in user input and stores them into an array and then prints them, removes duplicates, and sorts in ascending order. The user can also stop by inputting a sentinel value (in this case -1). But i am also supposed to ignore any negative value besides -1. When i input any other negative value into the program it messes up. How would i go about ignoring the negative values?

Code:
#include<stdio.h>
int main()
{
int input, nums[20], i, j, k, temp, count=0, count2=0;
for(i=0;i<20;i++)

[Code] .....

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C :: Find Prime Numbers - How To Use Bit Array

Aug 19, 2013

I wrote some code for class to find prime numbers.The teacher says that I need to revise my code with the requirement below: use a bit array to store the prime number checking. The bit array will also be in the heap. Use the max value of an unsigned 32-bt integer (UINT_MAX) to be the maximum size of the prime number you want to check.

Code:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <getopt.h>
#include <ctype.h>
#include <stdint.h>

//function to set all non-primes to 0
void *zero_multiples(void *threadid);

[Code] .....

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C :: Store Random Numbers In Array

Jan 11, 2015

i cannot print the values stored in the array ?

Code:
#include<stdio.h>
#include<math.h>
#include<time.h>
#include<stdlib.h>
double randf();

[Code] ....

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C :: Enter 10 Positive Numbers In Array

Nov 3, 2014

I have task to make program.. To enter 10 positive numbers in an array. Find three numbers that stand near each other and that have the maximum sum.

I understand how to make array, enter 10 number i find only one biggest number from 10.. How to find three max number sum that stand near each other..

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C :: Sum Of Fourth Powers Of Numbers In Array

Dec 9, 2014

I want to have a program that will calculate the sum of the fourth powers of 100 real numbers in an array (numbers in this array are stated explicitly in the code), code I have for integers is working perfectly but i want it to work also for non integers.

Code:

#include "stdafx.h"
#include "math.h"
int sum_array(int a[], int numelements) {
long double i, sum = 0;
for (i = 0; i<numelements; i++) {
sum = sum + pow((float)a[i], (int)4);

[code]....

The error messages i have: return' : conversion from 'long double' to 'int', possible loss of data.

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C :: Changing Order Of Numbers In Array

Dec 10, 2014

I want to write a programm that will reverse the order of the numbers in an array (e.g. as an input 1,2,3.5,4 and as an output i want 4,3.5,2,1) . But i have to problems:

1) I do not know how to properly change the type of a numbers inside an array from int to float or double, changing int to float in front of the a[10], does not change anything instead the code does not want to compile then.

2) I also want to make an array of a number of elements typed by a user with use of a "do" loop and how to put this parameter in the code.

Here is my code:

Code:

// ConsoleApplication3.cpp : Defines the entry point for the console application.//
#include "stdafx.h"
int _tmain(int argc, _TCHAR* argv[]) {
int a[10], i, n;
int pom;
do {
printf("number of elements in an array a: n = ");

[Code]...

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C :: Assign Numbers In A Buffer To 2D Array

Jul 11, 2014

How to assign numbers stored in a buffer memory to a 2D array.

The data type is unsigned 16bit (unsigned short) integers and they are stored in a 16bit/2bytes*1280*1024=2621440 bytes memory. The pointer pBuffer is the starting address of the buffer. Now I initiated an array and then assign the numbers to the array.

Code:
unsigned frame[1280][1024];
for (int i=0;i<1024;i++){
for(int j=0;j<1280;j++){
frame[i][j]=(*(unsigned short*)pBuffer+1024*i+j);
printf("%u ", frame[i][j]);
}
printf("
");
}

Because I know the number in the memory, I know after running the code that the result gives me nonsense.

I tried frame[i][j]=(*(unsigned short*)pBuffer+1024*2*i+2*j);

Since I think the pointer needs to move 2 bytes at a time, but it still gives me nonsensical array back.

Am I using the wrong expression to assign the values?

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C++ :: How To Count Repeated Numbers In Array

Jan 30, 2015

So I already gave this a go and will post my code below. The question is about the last loop before the program cout's. i thought the count would keep track of the repeated numbers so i could display them but it does not. I italicized the loop i am referring to. or at least i tried to xD

#include <iostream>
#include <iomanip>
using namespace std;
int main() {
int inputs[30];
int numofloops;
int maxvalue = inputs[0];

[Code]...

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