# How do you find the median of an array?

## How do you find the median of an array?

To calculate the median first we need to sort the list in ascending or descending order. If the number of elements are even, then the median will the average of two numbers in the middle. But the number is odd then the middle element of the array after sorting will be considered as the median.

## How do you find the mean of an array in C++?

Using a for loop, we take count numbers as input from user and store in an integer array inputArray. Then using a for loop, we find the sum of all array elements and store the result in sum variable. Finally, to find the average of all array elements we divide sum by count.

How do you find the median of an unsorted array?

Given an unsorted array arr[] of length N, the task is to find the median of of this array….Naive Approach:

1. Sort the array arr[] in increasing order.
2. If number of elements in arr[] is odd, then median is arr[n/2].
3. If the number of elements in arr[] is even, median is average of arr[n/2] and arr[n/2+1].

How do you find the mean median and mode in C++?

Cpp Code for Mean, Median, Mode

1. #include
2. using namespace std;
3. int main()
4. int invalue[]={2,4,5,2,6};
5. int num_value=5;
6. float tot=0;
7. float mean=0;
8. for(int i=0; i

### How do you sort an array in C++?

first – is the index (pointer) of the first element in the range to be sorted. last – is the index (pointer) of the last element in the range to be sorted. For example, we want to sort elements of an array ‘arr’ from 1 to 10 position, we will use sort(arr, arr+10) and it will sort 10 elements in Ascending order.

### How do you find the median in C++?

For calculating the median

1. If n is odd 1, 2, 3, 4, 5 Median = 3.
2. If n is even 1, 2, 4, 5 Median = (2 + 4) / 2 = 3.
3. Input arr[] = {3,5,2,1,7,8}
4. Output Mean is : 4.33333 Median is : 4.
5. Input arr[] = {1, 3, 4, 2, 6, 5, 8, 7}
6. Output Mean is: 4.5 Median is: 4.5. Algorithm.

How do you find the median of an unsorted array C++?

To find the median of an unsorted array, we can make a min-heap in O(nlogn) time for n elements, and then we can extract one by one n/2 elements to get the median.

What is median array?

Median of a sorted array of size n is defined as the middle element when n is odd and average of middle two elements when n is even.

#### How do I get the size of an array in C++?

How to find the length of an ​array in C++

1. #include
2. using namespace std;
3. int main() {
4. int arr[] = {10,20,30,40,50,60};
5. int arrSize = sizeof(arr)/sizeof(arr[0]);
6. cout << “The size of the array is: ” << arrSize;
7. return 0;

#### How do you initialize an int array in C++?

int foo[] = { 10, 20, 30 }; int foo[] { 10, 20, 30 }; Here, the number of the array n is calculated by the compiler by using the formula n= #of initializers/sizeof(int). Static arrays, and those declared directly in a namespace (outside any function), are always initialized.

How do you get the size of an array passed to a function in C++?

The reason is, arrays are always passed pointers in functions, i.e., findSize(int arr[]) and findSize(int *arr) mean exactly same thing. Therefore the cout statement inside findSize() prints the size of a pointer.

How do you declare an array in C?

Declaring C Arrays. In order to declare an array, you need to specify: The data type of the array’s elements. It could be int, float, char, etc. The name of the array. A fixed number of elements that array may contain. The number of elements is placed inside square brackets followed the array name.

## What is a 2D array in C?

An array of arrays is known as 2D array. The two dimensional (2D) array in C programming is also known as matrix. A matrix can be represented as a table of rows and columns. Before we discuss more about two Dimensional array lets have a look at the following C program.

## What is array syntax?

The primary facility for accessing the values of the elements of an array is the array subscript operator. To access the i-indexed element of array, the syntax would be array[i], which refers to the value stored in that array element. Array subscript numbering begins at 0 (see Zero-based indexing).

What is the definition of “array” in C?

C – Arrays. Arrays a kind of data structure that can store a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.