C :: Sorting Arrays Of Pointers - Assigning Data To Gene
Feb 11, 2013Code:
typedef struct {
name_t name;
float beta[beta_num];
} gene_t;
[Code] ....
Is gene an array of address ? How come the compare function doesn't work ?
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C :: Passing Arrays To Other Data Has Pointers?
May 7, 2013I am looking for an example of when passing arrays to other data that has pointers,
I understand the terms I would just like to see a small example of code that actually demonstrates this process.
C :: Assigning Values To Arrays / Printing Arrays
Jul 1, 2014Using a for loop, construct two 100 element arrays, x and y, such that element i of x stores the value sin(2*pi*i/100)) and the corresponding element of y stores cos((2*pi*i/100)). Print the values stored in the elements of x and y as you calculate them.
I have attempted to solve it but I'm not sure why the value 0 is only being printed, maybe I haven't assigned sin(2i/100)) and cos((2i/100)) to the arrays properly?
Code:
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main () {
[Code] .....
C++ :: Dynamic Creation Of Arrays Of Pointers To Arrays Of Pointers
Apr 15, 2013I'm trying to write a function that takes a 32bit address and a data to store at this address.
I'm wanting to take the 32 bit memory address eg 0x12345678 and split it
into 4 x 2 bytes
12, 34, 56, 78
then each of the 4 entries is at most a 256 entry array.eg
FF, FF, FF, FF
So in this example, 0x12 points to 0x34 in the second array, which points to 0x56 in the third array, which finally points to 0x78 in the last array. This last array holds the actual data.
After successfully doing 0x12345678, say I might get a read for 0x1234AABB. So, the first and second pointers already exist, but I then have to create and write to dynamically created arrays.
The arrays need to have all entries set to NULL so that i know whether to follow the pointers to overwrite a previously entered value or create new arrays and pointers.
It all looks good and simple in the pseudo code I've written up but I'm having trouble coding it. I'm currently trying to deal with the first entry case, ie all array elements are NULL, but I'm getting confused with the pointers and creation of new arrays.
void cpu::store(unsigned int mem_add,unsigned int mem_val) {
int first = (mem_address&4278190080)>>24;
int second = (mem_address&16711680)>>16;
int third = (mem_address&65280)>>8;
int fourth= (mem_address&255);
[Code] .....
A1 has been declared as
int* A1[256] ;
C++ :: Assigning Physical Values To Pointers In VC++?
Sep 9, 2013The problem may only apply to VC++ compiler - ??.
Cannot do this:
const unsigned int Port = 0x900E0000;
unsigned int *pData = Port; //Error - can't convert from int to int*.
Solution:
const unsigned int PORT = 0x900E0000;
const unsigned int PORT_PTR = ((unsigned int *)0x900E0000);
unsigned int *pData = PORT_PTR; //No Error.
I found no way to do it but the above.
Ex., you cannot do:
pData = (unsigned int *)0x900E0000;
C++ :: Why Asterisk Required On Smart Pointers For Assigning Value
May 19, 2013When i try to compile this code it gives me a error during run-time saying "*program name* has stopped working"
Code:
#include <iostream>
#include <memory>
using std::cout;
using std::endl;
using std::unique_ptr;
[Code] .....
Why is this happening? Also why do you need the asterisk on smart pointers to assign them a value? Is it just because, or is there a reason.
C/C++ :: Assigning Functions To Array Of Function Pointers
May 13, 2013I'm trying to create an array of function pointers and then assign compartilbe functions to them, so I can just call *pf[0](xxx);
The functions are all of the type
void func01(unsigned char*, int, int)
how would I create an array of function pointers and assign the address of the functions to them? So I could call them like
ptrToFunction[i](charBuffer, 10, 20);
I've read a bit on line and I thought I could do it but so far I've failed.
It seems trivial and I feel I'm close but close isn't good enough.
I'd like to assign the fuction addresses like this:
for (int i=0; i<10; i++)
if (i==1)
ptrToFunction[i]=func01;
if (i==2)
ptrToFunction[i]=func02;
etc.
The actual logic is somewhat different than this but this close.
C++ :: Assigning Values To Arrays
Apr 13, 2013Here is the code:
#include <iostream>
using namespace std;
int main(int argc, char * argv[])
{
double foo [5][5];
This is the warning:warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x...It's referring to the boldened part.
C/C++ :: Sorting Numbers Through Pointers?
May 5, 2014I'm writing a simple program to sort numbers through use of a pointer. I've always been bad with pointers, and I tried to use a typical temp value to hold the value, but i feel like I am over doing it.
#include <iostream>
using namespace std;
void SortTests(int *, int);
int main() {
int *ptr;
int tests;
[code]....
C++ :: Sorting 2 Corresponding Arrays?
Nov 21, 2013I am trying sort my Calorie array and day array corresponding to each other but how to start i cant grasp the concept for some reason. I want it to sort by calories in descending order.
So instead of this...
Day: Calories:
1 200
2 500
3 400
4 600
5 100
I want this.....
5 100
1 200
3 400
2 500
4 600
#include <cstdlib>
#include <iostream>
using namespace std;
//Prototypes
int getDays(int);
void getCal(int*,int);
float calcSum(float,int*,int);
[Code] ....
C++ :: Sorting Integers Without Arrays?
Jan 29, 2015I have been tasked with sorting a text file with some numbers in it. For example, there can be 5 numbers in it: 1,2,3, 4, and 5. However, they are out of order (3,2,4,1 and 5). I need the numbers in numerical order. How can you sort the numbers into a new file?
Bubblesorting? I can not use arrays in this program. I have already determined the minimum number in the file.
C++ :: Sorting Two Arrays Of Structures?
Mar 26, 2013I wanted to sort two structure-arrays according to their element values and get their indices changed accordingly.For example if my array is
A[]= { 2 4 1 8 6}
indices[]={ 1 2 3 4 5}
then after sorting it should become
A[]= { 1 2 4 6 8}
indices[]={ 3 1 2 5 4}
I tried implementing it using the following code but I failed to get correct output.
Code:
#include<iostream>
#include<cstdio>
using namespace std;
#define inf 100000
struct array
{
int x;
int y;
};
[code]....
C/C++ :: Sorting And Indexing Arrays?
Apr 22, 2014I am trying to create a program that will read data from a text file into a string. Afterwards I need to sort the data in ascending order and print it. So far my program reads the data but I'm not sure how to go about indexing the array.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
[Code].....
C/C++ :: Counting And Sorting Arrays?
Nov 7, 2014I'm trying to write a program that should output, in a tabular form, the name of the algorithm, size of the array, number of comparisons and number of swaps. I am really, really, really bad at arrays and comprehending how to output variables from several. Especially in tabular form />
Here is what I have written thus far:
#include <stdio.h>
#include <stdlib.h>
#define MAX_ARY_SIZE 10
[Code]......
My questions:
1 - How do I make the array size change from 10 to 100 to 1000?
2 - How do I populate the array's with random non-repeating numbers?
3 - How do I make each algorithm count the # of comparisons and swaps?
4 - How do I return the counted comparisons AND swaps (in one return function??) and then print them?
C :: Print Two Arrays On Same Table After Sorting
Jul 11, 2013Having trouble with homework involving (title). Here is the assignment:Write a program that allows the user to enter 10 numbers from the keyboard. Sort the numbers using any sort routine you wish. The output from your program should be 2 columns of numbers. The left column should be the numbers in the order they were originally entered and the right column should be the sorted list. The columns should be labeled. You will need 2 arrays to accomplish this.
Use separate functions for input, sorting, and printing.So, I have to use separate functions for each of these. I would think it would be easiest to do the input in Main() and then the sorting and printing in another function, but of course since you can't return arrays I am kind of stuck on how I return the new array after sorting. I thought about doing the sorting in Main(), but then I would need to still do the original arrays input in a function and would still run into the same problem.
Here is what I have so far:
Code:
//Cameron Taylor
#include <stdio.h>
#define MAXARRAY 10
int highLow(int[], int);
int print(int[], int[], int);
int main (){
int unsorted[MAXARRAY], i, j, temp;
[Code]...
I know it seems simplistic right now, but I am just trying to get it to work first and then go back and beautify it up a bit.
C++ :: Merging Arrays And Sorting The Resultant
Jan 10, 2015Write a program using user-defined function to merge the contents of two sorted arrays A & B into third array C. Assuming array A is sorted in ascending order, B is sorted in descending order, the resultant array is required to be in ascending order.
View 1 Replies View RelatedC++ :: Sorting Arrays In Ascending Order
May 28, 2014// OK this program outputs an array of numbers which are read from two .txt //files which are set1 and set2.
// set1.txt has: 8 37 29 31 40 25 18 38 4 45 34 39 12 21 24 3 5 23 26 44
// set2.txt has: 46 42 25 20 19 29 49 4 32 2 10 12 39 17 33 6 3 15 45 21
// But the problem is that when you run the program, the numbers do not come out // in numerical order.
#include <iostream>
#include <fstream>
#include <string>
[Code]....
C/C++ :: Sorting And Searching Two Arrays (int / String)
Apr 2, 2014Write a function to read and display the contents of names and marks. You then ask the user for a name and using the linear search return the index to the user. If -1 is returned then the name is not in the file. Otherwise write out the name and mark for that student.
Next, sort the arrays, write them out and then ask the user for a name to search for. This time use the binarySearch to return -1 or an index. Display the student's name and mark if found.
void getNames(ifstream& inStream, string names[], int marks[], int numElts);
int linearSearch(const string names[], int numElts,string who);
int binarySearch(const string names[], int numElts,string who);
void selectionSort(string names[], int marks[],int numElts);
void displayData(const string names[], const int marks[], int numElts);
[Code] ....
Now I have worked up some stuff in parts but I am so lost and confused with these specific requirements: Previous questions asked me to sort out a linear search, a binary search and
LINEAR SEARCH:
int searchList(int list[], int numElems, int value) {
int index = 0; // Used as a subscript to search array
int position = -1; // To record position of search value
bool found = false; // Flag to indicate if value was found
[Code] ....
Visual C++ :: Sorting Parallel Arrays?
Apr 4, 2014Class 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]...
C++ :: Use Different Pointers For Arrays?
Dec 24, 2013So when if you want to change the values themselves for example in an array (just for example) this is valid;
void test(int* test)
{
test[0] += 10;
}
int bob[] {1, 3, 5};
If you did that bob[0] would not equal 11. All well and good right?
Now if you do this?
int sally = 33;
test(sallay);
This wouldn't work at all you actually have to use
void test(int& test)
{
test += 10;
}
how the memory addresses etc. are working here? I don't understand why you need to use & the reference operator if it's not an array? Why wouldn't that still work?
C++ :: Sorting Arrays - Int Numbers From Highest To Lowest
Oct 29, 2014For my program i need to sort my int numbers [5] from highest to lowest but it seems that i made it go from lowest to highest ...
Code:
#include <iostream>
using namespace std;
int main() {
int numbers[5] = {3, -6, 10, 1, 130};
int counter1, counter2, tempNum;
//Highest to Lowest
[Code] ....
C :: How To Use Character Pointers Instead Of Arrays
Apr 14, 2013Here is my program to look up words. How do I use character pointers instead of using arrays?
Code:
#include <stdio.h>
struct entry
{
[Code].....
C :: Dynamic Arrays And Pointers
Feb 11, 2013I am having troubles with dynamic arrays and pointers. All the errors are of that kind. I think when I am assigning malloc to an array we assign to its address.
Code:
/*Create an array of genes of the large matrix*/
gene_t gene,gene1,gene2;
gene=malloc(INITIAL*sizeof(gene2)); Code:
while(...) {
if (gene_num==current_size){
[Code] .....
C :: Arrays And Pointers In A Loop
Jun 27, 2013Set an Array (a[10]) and a Pointer to that array (*pa) and code a loop (for( ; ; loop) that will advance that pointer (*pa) and will set a new content into it with each loop. that means that in the end of the day, my program will automatically set content to each cell of the array by promoting the pointer by 1 and add the sum to that pointer.
When I run the program it prints the address of the cells instead the value of it.
Code:
#include <stdio.h>
void main() {
float a[11], *pa; // Array and ptr set.
int i; // counter for the loop.
pa = a;
for (i=0 ; i<=10 ; i++) // the loop itself.
[Code] .....
C :: Merging Arrays Using Pointers
Jul 17, 2013Merging two arrays together using pointers!
View 4 Replies View RelatedC :: Accessing Arrays Using Pointers
Aug 30, 2013I came across the below code snippet in a project and was not sure how value of variable "response" is computed. Here as we can see, pic_data holds two one dimensional arrays but "response" access both the single dimensional array as two dimensional array.
Code:
#define MAX 100
#define MAXBUF 100
u32 response;
u32 index;
}
[code]....