﻿ C : Checks if an unsorted array has consecutive elements

# C Exercises: Checks whether the elements in an unsorted array appears consecutively or not

## C Array: Exercise-92 with Solution

Write a program in C that checks whether the elements in an unsorted array appear consecutively or not.

Sample Solution:

C Code:

``````#include<stdio.h>
#include<stdlib.h>
#include <stdbool.h>

// Function to find the minimum value in an array
int FindMin(int arr1[], int n);

// Function to find the maximum value in an array
int FindMax(int arr1[], int n);

// Function to check if the elements of an array are consecutive
bool areConsecutive(int arr1[], int n)
{
if (n < 1)
return false;

// Find the minimum and maximum elements in the array
int min_no = FindMin(arr1, n);
int max_no = FindMax(arr1, n);

// If the difference between max and min values + 1 is equal to the size of the array
if (max_no - min_no + 1 == n)
{
bool *checked = (bool *) calloc(n, sizeof(bool)); // Allocate memory for a boolean array

int i;
// Iterate through the array
for (i = 0; i < n; i++)
{
// If the current number's index in checked is already true, it's not consecutive
if (checked[arr1[i] - min_no] != false)
return false;

checked[arr1[i] - min_no] = true; // Mark the current number as checked
}
return true; // If all numbers are consecutive
}
return false; // If difference is not equal to n
}

// Function to find the minimum value in an array
int FindMin(int arr1[], int n)
{
int min_no = arr1;
for (int i = 1; i < n; i++)
if (arr1[i] < min_no)
min_no = arr1[i];
return min_no;
}

// Function to find the maximum value in an array
int FindMax(int arr1[], int n)
{
int max_no = arr1;
for (int i = 1; i < n; i++)
if (arr1[i] > max_no)
max_no = arr1[i];
return max_no;
}

// Main function
int main()
{
int arr1[]= {7, 4, 3, 5, 6, 2}; // Test array
int i;
int arr_size = sizeof(arr1)/sizeof(arr1); // Calculate array size
//------------- print original array ------------------
printf("The given array is:  \n");
for(i = 0; i < arr_size; i++)
{
printf("%d  ", arr1[i]); // Print the elements of the array
}
printf("\n");
//-----------------------------------------------------------
int n = sizeof(arr1)/sizeof(arr1);
if(areConsecutive(arr1, n) == true)
printf("The appearance of elements in the array are consecutive.");
else
printf("The appearance of elements in the array are not consecutive.");
return 0;
}
```
```

Sample Output:

```The given array is:
7  4  3  5  6  2
The appearence of elements in the array are consecutive.

The given array is:
7  4  4  5  6  2
The appearence of elements in the array are not consecutive.

The given array is:
7  4  9  5  6  3
The appearence of elements in the array are not consecutive.
```

Visual Presentation: Flowchart 1: Flowchart 2: C Programming Code Editor:

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

﻿