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  1. #include <stdio.h>
  2.  
  3. void swap(int *i, int *j)
  4. {
  5.     int temp = *i;
  6.     *i = *j;
  7.     *j = temp;
  8. }
  9.  
  10. int seperateEvenAndOdd(int arr[], int size)
  11. {
  12.     // Initialize left and right indexes
  13.     int left = 0;
  14.     int right = size - 1;
  15.  
  16.     while(left < right)
  17.     {
  18.         // Increment left index till the number is even
  19.         // num%2 == 0, condition to check even number
  20.         while(arr[left]%2 == 0 && left < right)
  21.         {
  22.             left++;
  23.         }
  24.  
  25.         // Decrement right index till the number is odd
  26.         while(arr[right]%2 == 1 && left < right)
  27.         {
  28.             right--;
  29.         }
  30.  
  31.         // Time to swap
  32.         if(left < right)
  33.         {
  34.             swap(&arr[left], &arr[right]);
  35.             left++;
  36.             right--;
  37.         }
  38.     }
  39. }
  40.  
  41. int main(void) {
  42. 	// your code goes here
  43. 	int arr[] = {4, 8, 15, 16, 23, 42};
  44.  
  45. 	seperateEvenAndOdd(arr, 6);
  46.  
  47. 	for (int i = 0; i<6;i++)
  48. 		printf("%d ", arr[i]);
  49.  
  50. 	return 0;
  51. }
  52.  
Success #stdin #stdout 0s 9432KB
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stdin
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Standard input is empty
stdout
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4 8 42 16 23 15
https://ideone.com/EReSp3
language:
C (gcc 8.3)
created:
6 years ago
visibility:
secret

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