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Wednesday, 27 March 2019

Insertion Sort

ALGORITHM InsertionSort(A[0..n - 1])

//Sorts a given array by insertion sort
//Input: An array A[0..n - 1] of n orderable elements
//Output: Array A[0..n - 1] sorted in nondecreasing order

for i ← 1 to n - 1 do

v ← A[i]

j ← i - 1

while j ≥ 0 and A[j] > v doA[j + 1] ← A[j]j ← j - 1

A[j + 1] ← v 




C program:

#include <stdio.h>
#include<stdlib.h>
  int main ()
{
  int i, j, a[20], n, min, temp;
  printf ("ENTER SIZE OF ARRAY\n");
  scanf ("%d", &n);
  printf ("enter  elements\n");
  for (i = 0; i < n; i++)
    scanf ("%d", &a[i]);
  for (i = 1; i <= n - 1; i++)
    {
      for (j = i; j >=1; j--)
        {
          if (a[j] < a[j-1])
      {
       temp = a[j-1];
      a[j-1] = a[j];
      a[j] = temp;
    }
}
}
  printf ("SORTED ELEMENTS ARE:\n");
  for (i = 0; i < n; i++)
    printf ("%d\t", a[i]);


  return 0;
}

Output:

ENTER SIZE OF ARRAY
5
enter  elements
1
2
4
5
3
SORTED ELEMENTS ARE:
1       2       3       4       5

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