﻿ C Program: Generate a random permutation of array elements - w3resource

# C Exercises: Generate a random permutation of array elements

## C Array: Exercise-77 with Solution

Write a program in C to generate random permutations of array elements.

Visual Presentation:

Sample Solution:

C Code:

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

// Function to swap the values of two integers
void changeValues(int *a, int *b) {
int temp = *a;
*a = *b;
*b = temp;
}

// Function to display elements of an array
void ArrayDisplay(int arr1[], int n) {
printf("The shuffled elements in the array are:  \n");
for (int i = 0; i < n; i++)
printf("%d ", arr1[i]);
printf("\n");
}

// Function to shuffle an array randomly
void shuffleRandom(int arr1[], int n) {
srand(time(NULL)); // Seed for random number generation

for (int i = n - 1; i > 0; i--) {
int j = rand() % (i + 1); // Generate a random index between 0 and i
changeValues(&arr1[i], &arr1[j]); // Swap elements at indices i and j
}
}

int main() {
int arr1[] = {1, 2, 3, 4, 5, 6, 7, 8};
int n = sizeof(arr1) / sizeof(arr1[0]);
int i;

// Print the original array
printf("The given array is:  \n");
for (i = 0; i < n; i++) {
printf("%d  ", arr1[i]);
}
printf("\n");

shuffleRandom(arr1, n); // Shuffle the array
ArrayDisplay(arr1, n); // Display the shuffled array

return 0;
}
```
```

Sample Output:

```The given array is:
1  2  3  4  5  6  7  8
The shuffled elements in the array are:
2 8 7 3 4 5 1 6
```

Flowchart:

C Programming Code Editor:

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