﻿ C : Array, shift all 0 to the end, double the value of next

# C Exercises: Double its value and replace the next number with 0 if current and next value are same and shift all 0's to the end

## C Array: Exercise-106 with Solution

Write a C program to convert an array in such a way that it doubles its value. This will replace the next element with 0 if the current and next elements are the same. This program will rearrange the array so that all 0's are moved to the end.

Sample Solution:

C Code:

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

// Function to move all non-zero elements to the beginning of the array
void ZerosAtEnd(int arr1[], int n)
{
int ctr = 0;
for (int i = 0; i < n; i++)
if (arr1[i] != 0)
arr1[ctr++] = arr1[i]; // Shift non-zero elements to the front

while (ctr < n)
arr1[ctr++] = 0; // Fill remaining positions with zeros
}

// Function to update the array by merging consecutive identical non-zero elements and moving zeros to the end
void updateArrayRearrange(int arr1[], int n)
{
if (n == 1)
return; // If the array has only one element, return without any change

for (int i = 0; i < n - 1; i++)
{
if ((arr1[i] != 0) && (arr1[i] == arr1[i + 1]))
{
arr1[i] = 2 * arr1[i]; // Merge consecutive identical elements by doubling the first element
arr1[i + 1] = 0; // Set the next element as 0
i++; // Skip the next element as it's already processed
}
}

ZerosAtEnd(arr1, n); // Move all zeros to the end of the array
}

// Function to print the array
void ArrayPrinting(int arr1[], int n)
{
for (int i = 0; i < n; i++)
printf("%d  ",arr1[i]); // Print each element of the array
}

// Main function
int main()
{
int arr1[] = { 0, 3, 3, 3, 0, 0, 7, 7, 0, 9 };
int n = sizeof(arr1) / sizeof(arr1);

printf("The given array is:  ");
ArrayPrinting(arr1, n); // Display the initial array

updateArrayRearrange(arr1, n); // Update the array by merging consecutive identical elements and moving zeros
printf("\nThe new array is: ");
ArrayPrinting(arr1, n); // Display the modified array

return 0;
}
```
```

Sample Output:

```The given array is:  0  3  3  3  0  0  7  7  0  9
The new array is: 6  3  14  9  0  0  0  0  0  0
```

Flowchart 1: Flowchart 2: C Programming Code Editor:

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