Tasks: One-dimensional arrays C ++

Getting to the solution of tasks, read articles Arrays in C++ and The random number generator rand(), if you have not read them. Try to address the proposed tasks independently and watch our decisions only in extremis.

1. Create an array of type int on 10 elements and fill it with random numbers from 7 to 14. After filling overwrite all numbers, who for more than ten: from the stored value to take away 10. For example the number is stored in the cell 12: 12 – 10 = 2. Write to this cell 2 Writing the new value, use composite(combined) statements.

View code

[crayon-662a43572e751306896925/]

Для получения случайного числа в каком-либо диапазоне можно воспользоваться формулой: a + rand() % (b – a + 1). a – the minimum number in the range, b – максимальная. Применив к нашей задаче получим:

[crayon-662a43572e75a212488050/]

In strings 21 – 28 перебираем значения массива и отнимаем 10 от значений которые больше десяти.

2. To fill an array of elements 50 odd numbers from 1 to 99. (use the operation remainder of the division, to check on the number of parity)

View code

[crayon-662a43572e75c721005501/]

First, write down the generated random number i-th cell array (string 18). Next, check the value of the parity (the if block – strings 19 – 23). If an even – then on the next iteration of the loop, random number will again be written in the same cell and checked for parity. If the odd – the number will be displayed on the screen and the value of the loop counter is increased by one unit.

3. Declare three arrays. The first two to fill with random values from 10 to 30. In the third elements of the array to record the amount of the corresponding elements of the first two sets. (in the third cell zero – the sum of zero cells first and second arrays, and so on). Then, find the arithmetic mean of the elements of the third array, the maximum value and minimum value, which it holds.

View code

#include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std;

int main()
{
	setlocale(LC_ALL, "rus");

	const int SIZE = 10;

	int ourArr[SIZE] = {};
	int ourArr2[SIZE] = {};
	int ourArr3[SIZE] = {};
	
	srand(time(NULL));
	// заполняем первые два массива
	cout << "Массив ourArr:  ";
	for(int i = 0; i < SIZE; i++)
	{
		ourArr[i] = 10 + rand() % 21;
		cout << ourArr[i] << " | ";
	}
	cout << endl << endl;

	cout << "Массив ourArr2: ";
	for(int i = 0; i < SIZE; i++)
	{
		ourArr2[i] = 10 + rand() % 21;
		cout << ourArr2[i] << " | ";
	}
	cout << endl << endl;

	// заполняем третий массив
	cout << "Массив ourArr3: ";
	for(int i = 0; i < SIZE; i++)
	{
		ourArr3[i] = ourArr[i] + ourArr2[i];
		cout << ourArr3[i] << " | ";
	}
	cout << endl << endl;

	// ищем среднее арифм., минимум и максимум
	int averageValue = 0;
	int sum = 0;
	int minValue = ourArr3[0];
	int maxValue = ourArr3[0];

	for(int i = 0; i < SIZE; i++)
	{
		sum += ourArr3[i];

		if(ourArr3[i] < minValue)
		{
			minValue = ourArr3[i];
		}

		if(ourArr3[i] > maxValue)
		{
			maxValue = ourArr3[i];
		}
	}

	averageValue = sum / SIZE;

	cout << "Среднеe арифметическое = " << averageValue << endl;
	cout << "Минимальное значение   = " << minValue << endl;
	cout << "Максимальное значение  = " << maxValue << endl;
	cout << endl << endl;

return 0;
}

#include <iostream>

#include <ctime>

#include <cstdlib>

using namespace std;

int main()

{

setlocale(LC_ALL, "rus");

const int SIZE = 10;

int ourArr[SIZE] = {};

int ourArr2[SIZE] = {};

int ourArr3[SIZE] = {};

srand(time(NULL));

// заполняем первые два массива

cout << "Массив ourArr: ";

for(int i = 0; i < SIZE; i++)

{

ourArr[i] = 10 + rand() % 21;

cout << ourArr[i] << " | ";

}

cout << endl << endl;

cout << "Массив ourArr2: ";

for(int i = 0; i < SIZE; i++)

{

ourArr2[i] = 10 + rand() % 21;

cout << ourArr2[i] << " | ";

}

cout << endl << endl;

// заполняем третий массив

cout << "Массив ourArr3: ";

for(int i = 0; i < SIZE; i++)

{

ourArr3[i] = ourArr[i] + ourArr2[i];

cout << ourArr3[i] << " | ";

}

cout << endl << endl;

// ищем среднее арифм., минимум и максимум

int averageValue = 0;

int sum = 0;

int minValue = ourArr3[0];

int maxValue = ourArr3[0];

for(int i = 0; i < SIZE; i++)

{

sum += ourArr3[i];

if(ourArr3[i] < minValue)

{

minValue = ourArr3[i];

}

if(ourArr3[i] > maxValue)

{

maxValue = ourArr3[i];

}

averageValue = sum / SIZE;

cout << "Среднеe арифметическое = " << averageValue << endl;

cout << "Минимальное значение = " << minValue << endl;

cout << "Максимальное значение = " << maxValue << endl;

cout << endl << endl;

return 0;

}

To find the arithmetic mean of the third array, we calculate the sum of all its components. It accumulates in the variable sum(line 51). variablesminValue andmaxValue assign the value of the first element of the array (strings 46, 47). In strings 53 – 61 each element is compared with the, that store these variables in the case of the conditions if blocks are overwritten. So we find the sum of a single loop, the minimum and maximum value. In string 64 calculate the arithmetic mean: averageValue = sum / SIZE;

[crayon-662a43572e75e546724191/]

110 thoughts on “Tasks: One-dimensional arrays C ++”

anon says:
24.11.2016 at 15:47
It seems easier to left, strictly on the condition made
C++
int arr[10]; const int x = 7, y = 14; srand(time(NULL)); for (int i = 0; i 10 ? arr[i] = arr[i] - 10 : 0; cout << arr[i] << " _ "; }
1
2
3
4
5
6
int arr[10];
const int x = 7, y = 14;
srand(time(NULL));
for (int i = 0; i 10 ? arr[i] = arr[i] - 10 : 0;
cout << arr[i] << " _ ";
}
Reply
Elena says:
26.11.2016 at 15:30
Hello. I did not understand one thing about the second problem. The task was: fill the array, consisting of odd numbers of 1 to 99.
In answer to the problem I saw another. the array has been created[50] with even and odd numbers from 1 to 99. And then, using if conditions are displayed only odd elements. But it does not mean, that was created by an array of only the odd numbers. cout does not write the new elements in the array, and stupidly displays the odd numbers. If we ask again to display an array of ourArr[i], it displays the array and the even and odd numbers. A task, in my opinion, It solved not correctly. If I'm wrong, you are welcome, explain to me…
Thank you)
Reply
1. Olej says:
  26.11.2016 at 16:26
  How do I it seems, in the 2nd task properly formulated condition tasks, rather than its solution. It should be something like:
  – fill a 50-element array occasional odd numbers in the range [1…100].
  And the solution of this problem given proper (one possible).
  Reply
2. Ruslan says:
  27.11.2016 at 13:41
  The problem is solved correctly. Step into the ring only if the number of changes in the array even, otherwise the cycle will be repeated until the number is not even( i ++ only with an even number)
  Reply
3. Ivan) says:
  02.02.2017 at 12:23
  It is true there is only one array , but its value is correct, since the function rand, It has the same masivi only uyavnim. And in our array zakladivaem only numbers strictly the drain. And when the second time we vivodit, he, too, it is true vivedet, They have been put to E 50 meaning, I hope to ve learned)
  I apologize for the broken Russian)
  Reply
Aytekin says:
07.01.2017 at 17:06
children, how do you imagine the solution of the first problem, in your reply, if you have not been shown how to do it randomly number. then there are, This task implies in itself the, that has not yet passed. and this is not the first time the way. Programming is based on logic, but in this case it is not observed.
Reply
1. tpojuh says:
  07.01.2017 at 18:03
  to the task of writing the top,”Getting to the solution of tasks, read articles Arrays in C ++ and the random number generator rand(), if you have not read them.
  Reply
  1. Aytekin says:
    07.01.2017 at 19:06
    yes, just. thanks for the answer. although errors still missing, of course.
2. tpojuh says:
  07.01.2017 at 19:30
  And you throw off the link,where clearer and better explains the basics, and if we talk about mistakes,what lay!One mistake already indicated…
  Reply
  1. admin says:
    08.01.2017 at 11:05
    tpojuh, who have stood up for us so, but you )) Thank you, kommentiruesh that article and respond to user comments.
  2. Aytekin says:
    08.01.2017 at 18:30
    even if it is nowhere clearer, This fact does not mean, that we should not strive for good, and should leave, breakwater, and so will descend. + Won, higher, mistake already indicated. the wording in the second task is not correct. but do not get me wrong, I say all this not because against, but because of. just wanted to, what would be better.
  3. admin says:
    08.01.2017 at 19:16
    Aytekin, everything is fine. At you no one takes offense )
    If possible, and if there is free time we will improve.

I sold all of Java. Suddenly you are interested.
1 The task:

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Random;


public class Lesson1 {
    public static void main(String[] args) {

        int[] arr = CreateArray();

        System.out.println("Random int[10] : " + Arrays.toString(arr));
        System.out.println("List with values > 10 - 2 : " + printList(createListArray(arr)));


    }

    private static int[] CreateArray() {
        Random random = new Random();
        int [] array = new int[10];

               for (int i = 0; i < array.length; i++) {
                   array[i] = random.nextInt(8) + 7;
               }

                return array;
    }

    private static ArrayList createListArray(int[] array) {

                ArrayList list = new ArrayList();

                    for (int arr : array) {
                        if (arr >= 10) {
                            list.add(arr - 10);
                        }
                    }

                    return list;
    }


    private static ArrayList printList(ArrayList list) {

        return list;
    }

}

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Random;

public class Lesson1 {

public static void main(String[] args) {

int[] arr = CreateArray();

System.out.println("Random int[10] : " + Arrays.toString(arr));

System.out.println("List with values > 10 - 2 : " + printList(createListArray(arr)));

}

private static int[] CreateArray() {

Random random = new Random();

int [] array = new int[10];

for (int i = 0; i < array.length; i++) {

array[i] = random.nextInt(8) + 7;

}

return array;

}

private static ArrayList createListArray(int[] array) {

ArrayList list = new ArrayList();

for (int arr : array) {

if (arr >= 10) {

list.add(arr - 10);

}

return list;

}

private static ArrayList printList(ArrayList list) {

return list;

}

2 The task:

import java.util.Arrays;
import java.util.Random;


public class Lesson2 {
    public static void main(String[] args) {

        System.out.println("int[50]%2 != 0 : "+Arrays.toString(createArray()));

    }

    private static int[] createArray() {

        Random random = new Random();
        int[] arr = new int[50];

                    for (int i = 0; i < arr.length;) {
                        int b  = random.nextInt(98)+1;
                            if ( b % 2 != 0) {
                                arr[i] = b;
                                i++;
                            }
                    }

                    return arr;
    }
}

import java.util.Arrays;

import java.util.Random;

public class Lesson2 {

public static void main(String[] args) {

System.out.println("int[50]%2 != 0 : "+Arrays.toString(createArray()));

}

private static int[] createArray() {

Random random = new Random();

int[] arr = new int[50];

for (int i = 0; i < arr.length;) {

int b = random.nextInt(98)+1;

if ( b % 2 != 0) {

arr[i] = b;

i++;

}

return arr;

}

3 The task:

package Purecodecpp;

import java.util.Arrays;
import java.util.Random;



public class Lesson3 {
    public static void main(String[] args) {

        int[] array1 = createArray1();
        int[] array2 = createArray2();
        int[] array3 = createArray3(array1,array2);


        System.out.println("1 array : " + Arrays.toString(array1));
        System.out.println("2 array : " + Arrays.toString(array2));
        System.out.println("  Sum   : " + Arrays.toString(array3));

        System.out.println();
        getMinMaxMiddle(array3);

    }

    private static int[] createArray1() {
        Random random = new Random();

        int[] array = new int[10];

                for (int i = 0; i < array.length; i++) {
                    array[i] = random.nextInt(20)+10;
                }

                return array;
    }

    private static int[] createArray2() {
        Random random = new Random();

        int[] array = new int[10];

        for (int i = 0; i < array.length; i++) {
            array[i] = random.nextInt(20)+10;
        }

        return array;
    }

    private static int[] createArray3(int[] array1, int[] array2) {

            int[] array = new int[10];


                        for (int i = 0; i < array.length; i++) {
                            array[i] = array1[i]+array2[i];
                        }


        return array;
    }

    private static void getMinMaxMiddle(int[] array) {

                int min = array[0];
                int max = array[0];
                int sum = 0;



                    for (int value : array) {
                        if (value  max) {
                            max = value;
                        }
                    }

        System.out.println("Maximum value of sum arrays: : " + max);

                for (int value : array) {
                   sum+=value;
                }

        System.out.println("Middle arithmetical value of sum arrays: " + sum / (array.length + 1));



    }
}

package Purecodecpp;

import java.util.Arrays;

import java.util.Random;

public class Lesson3 {

public static void main(String[] args) {

int[] array1 = createArray1();

int[] array2 = createArray2();

int[] array3 = createArray3(array1,array2);

System.out.println("1 array : " + Arrays.toString(array1));

System.out.println("2 array : " + Arrays.toString(array2));

System.out.println(" Sum : " + Arrays.toString(array3));

System.out.println();

getMinMaxMiddle(array3);

}

private static int[] createArray1() {

Random random = new Random();

int[] array = new int[10];

for (int i = 0; i < array.length; i++) {

array[i] = random.nextInt(20)+10;

}

return array;

}

private static int[] createArray2() {

Random random = new Random();

int[] array = new int[10];

for (int i = 0; i < array.length; i++) {

array[i] = random.nextInt(20)+10;

}

return array;

}

private static int[] createArray3(int[] array1, int[] array2) {

int[] array = new int[10];

for (int i = 0; i < array.length; i++) {

array[i] = array1[i]+array2[i];

}

return array;

}

private static void getMinMaxMiddle(int[] array) {

int min = array[0];

int max = array[0];

int sum = 0;

for (int value : array) {

if (value max) {

max = value;

}

System.out.println("Maximum value of sum arrays: : " + max);

for (int value : array) {

sum+=value;

}

System.out.println("Middle arithmetical value of sum arrays: " + sum / (array.length + 1));

}

Olej says:
01.02.2017 at 12:13
What for?
Reply

GUNnibAll says:
08.02.2017 at 10:04
I think, the second task is easier to do so:
do{
ourArr[i] = 1 + rand() % 100;
}while(ourArr[i] % 2 == 0);
Reply
heaven says:
12.02.2017 at 19:13
Zrastvuyte. I wanted to learn how to insert before each positive element of the array zero value
Reply
1. Olej says:
  13.02.2017 at 09:43
  In C / C ++ nezzya “insert” elements in the array.
  can only rewrite values in another array, bigger size, Where, rewriting, you will some elements set to zero.
  Reply
Max says:
14.02.2017 at 12:57
I do not know maybe I missed something, but it
srand(time(NULL));
Reply
1. Olej says:
  14.02.2017 at 14:05
  srand() – this initialization entry value sequence generator (pseudo)random values.
  As the initialization values used present time time( NULL ).
  Such things are done for, to the next program starts let's not repeat (random) the value of the. This is very bad for debugging this code.
  Reply
sid says:
18.02.2017 at 14:24
Hello everybody! tell me why can not I add the code here, I do everything as described above.
Reply
1. Olej says:
  19.02.2017 at 00:04
  If “here” – it comments, It is here, and you can not and do not need to put your code.
  These comments are not in order!
  Reply

Tasks: One-dimensional arrays C ++

110 thoughts on “Tasks: One-dimensional arrays C ++”

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