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.
Pictorial Presentation:

Sample Solution:
C Code:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void changeValues (int *a, int *b)
{
int temp = *a;
*a = *b;
*b = temp;
}
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");
}
void shuffleRandon ( int arr1[], int n )
{
srand ( time(NULL) );
for (int i = n-1; i > 0; i--)
{
int j = rand() % (i+1);
changeValues(&arr1[i], &arr1[j]);
}
}
int main()
{
int arr1[] = {1, 2, 3, 4, 5, 6, 7, 8};
int n = sizeof(arr1)/ sizeof(arr1[0]);
int i;
//------------- print original array ------------------
printf("The given array is: \n");
for(i = 0; i < n; i++)
{
printf("%d ", arr1[i]);
}
printf("\n");
//------------------------------------------------------
shuffleRandon (arr1, n);
ArrayDisplay(arr1, n);
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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Previous: Write a program in C to find largest number possible from the set of given numbers.
Next: Write a program in C to find four array elements whose sum is equal to given number.
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C Programming: Tips of the Day
C Programming - What is the argument for printf that formats a long?
Put an l (lowercased letter L) directly before the specifier.
unsigned long n; long m; printf("%lu %ld", n, m);
Ref : https://bit.ly/3dIwfkP
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