Advanced Database Management System - Tutorials and Notes: Selection sort recursive program in C in Data structures

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Sunday, 25 March 2018

Selection sort recursive program in C in Data structures

Selection sort recursive program in C in Data structures

Program in C:

#include <stdio.h>
#include<conio.h>

int x[50]; //declaration of global variable for array
int selectionSort(int, int); //function declaration

int main()
{
int i, n = 0, total;
printf ("Enter the number of elements you like to sort : ");
scanf("%d", &total);

for (i=0;i<total;i++)
{
    printf("Enter the element %d: ", i+1);
    scanf("%d", &x[i]);
}

printf (" Array Elements before sorting: ");

for (i=0; i<total; i++)
    printf ("%d ", x[i]);

// call selection sort function by passing position and the total number of elements
selectionSort(n, total);

printf ("\n Array Elements after sorting: ");
for (i=0; i<total; i++)
    printf ("%d ", x[i]);
getch();
}

int selectionSort( int n, int total)
{
int k, temp, min_key, min_index;
if (n== total-1)
return (-1);
min_key = x[n]; //initially the value at index 0 is considered minimum

min_index = n;

for (k = n+1; k<total; k++)
{
 if (x[k] < min_key) //checks whether min_key is minimum or other element. If other element is minimum then the other element value will be stored as new min_key
 {
  min_key = x[k];
  min_index = k;

 }
}
temp = x[n]; // swaps x[n] and x[p]

x[n] = x[min_index];
x[min_index] = temp;
n++ ;
selectionSort(n, total); //recursive call of the function

}

***********










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