C++ :: Generate Two Arrays From One Big Array?
Oct 12, 2014
I am trying to generate two arrays from one big array, of which the sum of the 2 array's elements are as close to equal or equal to each other if possible, or one array summed up minus the second array summed up will be as close to zero as possible. I start with int array of 30.
It says that the lowest possible combination of one array minus the other is 239 which I know is not true. Also this needs to run in under ten minutes.
#include <iostream>
using namespace std;
const int size = 30;
[Code]....
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Jul 14, 2014
Iam new to c++ and i want to write a program to generate an integer array. I keep getting the error at line 25: invalid types 'int[int]' for array .
int main() {
int rows;
int cols;
cin>>rows>>cols;
int test[rows][cols];
[Code] .....
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Feb 16, 2013
I'm currently working on assignment which requires to generate a random permutation of the first N integers. For example, if N = 4, one possible answer is {3,1,2,4} without duplicates. {3,3,2,4} is not correct
to fill a[4], generate random numbers until you get one that is not already in a[0], a[1], ..., a[n-1]. for a[0] whatever random number you generate can be put in it. So here is my code. It seem to works but sometime it give duplicates.
#include <iostream>
#include <stdlib.h>
#include <time.h>
[Code].....
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Jan 31, 2013
My program generates an array of random numbers. I want to then search a specific number within the array. If the number is in the array then a message apopears on the console saying that its there. I'm using the binary search algorithm to do this.
#include <iostream>
#include <ctime>
#include <cstdlib>
#include <iomanip>
#include <cstring>
using namespace std;
int size;
int getSize() { return size; }
[Code] ......
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Apr 24, 2013
When you have constant arrays, they are stored in the programme memory space. Upon execution, they are copied into the data space for easy access. To save space in the data space, it is possible to stop it from being copied. Some compilers will deal with this by just specifying the array as const, g++ has a type modifier called PROGMEM.
In any case, the problem is that I'd like to generate some data, preferably without using an external programme to do it. Hence, my question using the template system. Now I could possibly use macro metaprogramming via boost instead of template metaprogramming, and I may have to go that route. However there are limitations, especially since its numbering system is only equivalent to an unsigned byte, which I possibly could use, but could become more messy than if I use the template system that has long long types as well as a whole slue of type safety mechanisms.
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Oct 15, 2013
Assignment on making a program like candy crush but it is called as number crush.
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Nov 20, 2014
This is my coding so far and I am confused to what the constant for array size is
//initialize arrays
string states[ARRAY_SIZE]={"Alabama", "Alaska", "Arizona"};
string capital[ARRAY_SIZE]={"Montgomery", "Juneau", "Phoenix"};
while (play again) {
//generate random index number
int index = rand () % _______
what goes after the rand () % ?
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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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Nov 3, 2014
I wanted to do this: Accept a line of input from user and save it to an array1 and copy its contents to other array in a set of arrays and then input another line to array1 and then copy it to next array in the same set and so on.... I know it is confusing but I can put it like that I want to create an array of arrays (Set of arrays). How can I do so?
I wrote a code to input the line in an array and tried to copy it another array of pointers, but pointers are just addresses so the same adress is copied again and again so, all the pointers of the array point to one address only. The code doesn't print anything when I try to print all the lines that were saved.
Code:
#include <stdio.h>
#include <stdlib.h>
#define MAXLEN 1000
#define MAXSIZE 100
int getline(char [], int );
void storage(char line[]);
[Code] .....
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Jun 7, 2014
I need addition array1 array2 in new array before I make this program but the values of array1 and array2 there are in code c# that is worked without problem.
But now i need the user enter the values of arrays, i make that but i failed in addition array1 and array2
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace MyArray {
[Code] .....
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Jan 16, 2015
I am trying to do this:
Read a text file which is like:
2
2 10 1 2 7
3 8 3 7 7 10 7
The first line indicates how many paths exist in my design.
The second and third lines are those lines(the first number indicates 2 pairs, so 10,1 and 2,7 are 2 pairs)
The first element in the third line indicates 3 pairs and the pairs are 8,3 and 7,7 and 10,7.
I have been able to read the text file and store these into ONE array. However, I need to divide them up and have each line in a seperate array.
So for example
array alpha to contain 10,1 and 2,7
array beta to contain 8,3 and 7,7, and 10,7
How would you do this?
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Mar 21, 2013
how to correctly use realloc on an array of char arrays? Say I want to store strings in arrays (=array of char arrays) and double the size of max. strings (y value):
Code:
int x=200;
int y=10;
char *carray[y];
for (int j = 0; j < y; ++j)
carray [j] = malloc (sizeof(char)*x);}
}
[code]...
fix the realloc part of my code?
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Jan 29, 2015
I am wondering how I could make an array which contains arrays, but with a variable size.My first try..
Code:
int array[][] = {{1}, {2}};
But this isn't proper
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Mar 9, 2013
I have same question as posted by holla and Iam not sure about merging the contents of 2 sorted arrays into another array without duplication of values.
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Jan 11, 2014
Place the even lucky numbers in an array called evenList, the odd lucky numbers in an array called oddList, and the negative lucky numbers in an array called negList.
//So in main main i passed the array as parameter and the size;
void lucknumberlist(int favnum[], int size) {
int even = 0, odd = 0, neg = 0;
int evenArray[even];
int oddArray[odd];
int negArray[neg];
if(favnum[even] % 2 == 0) {
evenArray[even] = favnum[even];
[Code] .....
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Sep 23, 2014
I am puzzled with the strange behavior of my code below. The code has an apparent error but the results are correct. I am trying to put two arrays (chara and shuffled) into a third array join. The first 10 elements of 'join' should have the elements of 'chara' and the second half should have the elements of 'shuffled'.
You will note that in the second For loop, I am using 'chara' instead of 'shuffled' but when I print the contents of 'join' I am getting the correct numbers.
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,
On the other hand if I replace 'chara' with 'shuffled' in the second For loop, I am getting incorrect results.
1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,
Why is this happening? (I am using Codeblocks.)
#include <iostream>
#include <stdio.h>
using namespace std;
int main() {
int chara[]={1,2,3,4,5,6,7,8,9,10};
int shuffled[]={11,12,13,14,15,16,17,18,19,20};
[Code] ....
The question is cross-posted at: [URL] ....
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Oct 21, 2014
I have a problem with my assignment. I would like to ask how to transfer positive and negative values from array temperature to arrays positive and negative?
#include <iostream>
#include <iomanip>
using namespace std;
int main(){
int n=0, d=0, temperature[20], sum;
int positive[], negative[];
float avg;
[code]....
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Feb 28, 2014
I'm working on a homework assignment that asks me to roll two die a user given number of times, find the roll sums, and a few other things. I'm working on it one module at a time and I'm running into two big problems so far.
The first problem is that my int variable rolls changes to a number within the random number generator range of numbers after I run rolldie. I got around this by making a const equal to the user entered value of rolls just so that I could continue developing the program.
My second problem is that the values of the arrays resultsOne[] and resultsTwo[] are changed after running findsum(). Why this is happening and I even tried passing them as const, but that changed nothing. We just started learning about passing arrays to functions, so there might be something big that I'm missing.
Code:
#include <iostream>
#include <cstdlib>
using namespace std;
void rolldie(int resultsOne[], int sizeOfresultsOne, int resultsTwo[], int sizeOfresultsTwo);
void findsum(int resultsOne[], int sizeOfresultsOne, int resultsTwo[], int sizeOfresultsTwo, int tossSums[], int sizeOftossSums);
[Code] ....
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Nov 3, 2014
So first I have to display a 2D array with all 0s, which is pretty easy.
#include <iostream>
using namespace std;
int main (){
int array[5][5];
for(int a=0; a<5; a++){
for(int b=0; b<5; b++){
array[a][b] = 0;
[Code] ....
So this displays
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
Next, this is where it gets confusing. I have to create a virtual creature by storing a letter into a random position in the array (the array can be up to 20x20 in size). Then make a function that searches the array for creatures, so it would search for that character. When it finds a creature, it should randomly decide to either move the creature to an adjacent position, or have it stay where it is. After, it should ask the user to create a new creature, or quit.
So how would I go about adding & modifying the current code to achieve what is listed above?
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Feb 6, 2014
I define "Comwords" as a string, but apparently it takes the members as chars, then I can't set strings in a structure equal to the chars.
I see to also be having unknown problems with the ComMAL array and loading it values into another element of the same structure.
How to correct this? I was thinking of casting char elements as strings, but could find no reference in my library book regarding how to do that (lots on casting int's a doubles...)
Code:
int _tmain(int argc, _TCHAR* argv[]) {
int comm = 10;
int targ = 5;
int death;
struct AI_WORDS
[Code]....
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Jul 1, 2014
Using 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] .....
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Dec 17, 2014
int arr[4][5];
for (int(&row)[5] : arr){
for (int &column : row){
} }
Why do we name it row instead column?
int arr[row][column]
Wouldn't this be like
int arr[4][5];
for (int(&column)[5] : arr){
for (int &row: column){
}
It just seems funny to me because we use row[5] which should be 4 if we meant row? Or did I read it wrong in C++ prime !?
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Mar 17, 2013
I'm trying to generate random numbers so that I can assign people to teams. So far I have come up with this
Code:
int generateTeam(){
int i, teamNumber, c, n;
for (c = 0; c <= 5; c++) {
n = rand()%100 + 1;
}
[code]....
}//end generateTeam I'm not sure how to make it so that I can exclude the previous random number when generating the next one. As an example, I have 22 students and I get the number 19. Now I can't have 19 again because that guy already has it.
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Mar 1, 2015
I am a very very beginner at programming with C. Well, basically i have to generate a real number between 0 and 1 (which as the same as from 0 to 100 k and than dividing everything with 100 k).
Why I am constantly talking about 100 k? Because I would need approx 50 000 random numbers between 0 and 1. My code currently looks something like this:
Code:
int main(int argc, char** argv) { int min,max;
double number;
srand((unsigned)time(NULL));
number = 1 + rand()%100;
printf("The number is: %lf",number);
sleep(2);
return (EXIT_SUCCESS);
}
And If I am not mistaken, should generate numbers between 0 and 100. But I can't figure it out how to change to code in order to get enough numbers.
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Nov 20, 2013
Using loops that would generate the same results. I need to use a loop that would make the syntax less lengthy ....
Code:
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<iostream>
float check(float s);
void load(float*);
[Code] .....
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Jul 29, 2013
Code: I have these two columns.
ID Group
0 2
1 2
2 3
3 4
4 4
5 4
6 4
7 4 Code: I want to store ID values on the bases of same Group, like we do in Hash table (key, value) .
Group ID
2 0,1
3 2
4 3,4,5,6,7
so when i said key 2 it will give me 0,1. how can i do it. As first i thought that i can use array of array but then how i can store the value of key. Now I am thinking of hash but i don't know how I will store and retrieve these values.
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