Write user defined functions for the following sorting methods and compare their performance by time measurement with random data and Sorted data.


SELECTION SORT:

#include<stdio.h>
#include<conio.h>
#include<math.h>
#include<time.h>
#define n 10000

void selection_sort(int[]);
unsigned long int count=0;
void main()
{
            int a[n];
            int choice,i;
            clrscr();
            printf("1.Sorted Data  2.Random Data \n");
            scanf("%d",&choice);
            switch(choice)
            {
                        case 1:
                                    for(i=0;i<n;i++)
                                    {
                                                a[i]=i+1;
                                    }
                                    selection_sort(a);
                                    break;
                        case 2:
                                    for(i=0;i<n;i++)
                                    {
                                                a[i]=n-i;
                                    }
                                    selection_sort(a);
                                    break;
                       
                               default:
                                    printf("Choice is not appropiate");
                                    getch();
                                    break;
            }
            getch();
}

void selection_sort(int a[])
{
            int min,i,j,temp;
            double total_time;
            clock_t start,end;
            srand(time(NULL));
            start = clock();
            for(i=0;i<size;i++)
            {
                        min=i;
                        for(j=i+1;j<size;j++)
                        {
                                    if(a[j]<a[min])
                                    {
                                                min=j;
                                    }
                        }
                        if(min!=i)
                        {
                                    temp=a[min];
                                    a[min]=a[i];
                                    a[i]=temp;
                        }
            }
end =  clock();
total_time = ((double)(end - start)) / CLK_TCK;
 printf(“time : %f”,total_time);         
}

BUBBLE SORT:
#include<stdio.h>
#include<conio.h>
#include<math.h>
#include<time.h>
#define size 10000

void bubble_sort(int[]);
unsigned long int count=0;
void main()
{
            int a[size];
            int choice,i;
            clrscr();
            printf("1.Sorted Data  2.Random Data \n");
            scanf("%d",&choice);
            switch(choice)
            {
                        case 1:
                                    for(i=0;i<size;i++)
                                    {
                                                a[i]=i+1;
                                    }
                                    bubble_sort(a);
                                    break;
                        case 2:
                                    for(i=0;i<size;i++)
                                    {
                                                a[i]=size-i;
                                    }
                                    bubble_sort(a);
                                    break;
                        default:
                                    printf("Choice is not appropiate");
                                    getch();
                                    break;
            }
            getch();
}

void bubble_sort(int a[])
{
            int flag,i,j,temp;
            for(i=0;i<size-1;i++)
            {
                        flag=0;
                        for(j=0;j<size-i-1;j++)
                        {
                                    if(a[j]>a[j+1])
                                    {
                                                temp=a[j];
                                                a[j]=a[j+1];
                                                a[j+1]=temp;
                                                flag=1;
                                    }
                        }
                        if(flag==0)
                        {
                        return;
                        }
            }
}

INSERTION SORT:
#include<stdio.h>
#include<conio.h>
#include<math.h>
#include<time.h>
#define size 10000

void insertion_sort(int[]);
unsigned long int count=0;
void main()
{
            int a[size];
            int choice,i;
            clrscr();
            printf("1.Sorted Data  2.Random Data \n");
            scanf("%d",&choice);
            switch(choice)
            {
                        case 1:
                                    for(i=0;i<size;i++)
                                    {
                                                a[i]=i+1;
                                    }
                                    insertion_sort(a);
                                    break;
                        case 2:
                                    for(i=0;i<size;i++)
                                    {
                                                a[i]=size-i;
                                    }
                                    insertion_sort(a);
                                    break;
                        default:
                                    printf("Choice is not appropiate");
                                    getch();
                                    break;
}
            getch();
}

void insertion_sort(int a[])
{
            int key,i,j;
           
for(j=1;j<=size;j++)
            {
                        key=a[j];
                        i=j-1;
            while(i>=0 && a[i]>key)
                        {
                                    a[i+1] = a[i];
                                    i= i-1;
                        }
                        a[i+1] =key;
            }
}

MERGE SORT:
#include<stdio.h>
#include<conio.h>
#include<math.h>
#define size 10000
void merge_sort(int[],int,int);
void merge(int[],int,int,int);
unsigned long int count=0;
void main()
{
            int a[size];
            int choice,i;
            clrscr();
            printf("1.Sorted Data  2.Random Data \n");
             scanf("%d",&choice);
            switch(choice)
            {
                        case 1:
                                    for(i=0;i<size;i++)
                                    {
                                                a[i]=i+1;
                                    }
                                    merge_sort(a,0,size-1);
                                    break;
                        case 2:
                                    for(i=0;i<size;i++)
                                    {
                                                a[i]=size-i;
                                    }
                                    merge_sort(a,0,size-1);
                                    break;
                        default:
                                    printf("Choice is not appropiate");
                                    getch();
                                    break;
            }
            getch();
}

void merge_sort(int a[],int start,int finish)
{
            int middle,s;
            s=(finish-start)+1;
            if(s<=1)
            {
                        return;
            }
            middle = start+(s/2)-1;
            merge_sort(a,start,middle);
            merge_sort(a,middle+1,finish);
            merge(a,start,middle+1,finish);
}

void merge(int a[],int first,int second,int third)
{
            int i=first,j=second,l=-1,temp[size];
            while(i<second && j<=third)
            {
                        if(a[i]<=a[j])
                        {
                                    l++;
                                     temp[l]=a[i];
                                    i++;
                        }
                        else
                        {
                                    l++;
                                    temp[l]=a[j];
                                    j++;
                        }
            }
           
            if(i>=second)
            {
                        while(j<=third)
                        {
                                    l++;
                                    temp[l]=a[j];
                                    j++;
                        }
            }
            else
            {
                        while(i<second)
                        {
                                    l++;
                                    temp[l]=a[i];
                                    i++;
                        }
            }
            for(i=0;i<=l;i++)
            {
                        a[first+i]=temp[i];
            }
}

QUICK SORT:
#include<stdio.h>
#include<conio.h>
#include<math.h>
#include<time.h>
#define size 10000

void quick_sort(int [],int,int);
unsigned long int count=0;
void main()
{
            int a[size];
            int choice,i;
            clrscr();
            printf("1.Sorted Data  2.Random Data \n");
            scanf("%d",&choice);
            switch(choice)
            {
                        case 1:
                                    for(i=0;i<size;i++)
                                    {
                                                a[i]=i+1;
                                    }
                                    quick_sort(a,0,size-2);
                                    break;
                        case 2:
                                    for(i=0;i<size;i++)
                                    {
                                                a[i]=size-i;
                                    }
                                    quick_sort(a,0,size-2);
                                    break;
                        default:
                                    printf("Choice is not appropiate");
                                    getch();
                                    break;
            }
            getch();
}

void quick_sort(int a[],int lb,int ub)
{
            int flag=1,i,j,temp,key;
             double total_time;
            clock_t start,end;
            srand(time(NULL));
            start = clock();

            if(lb<ub)
            {
                        i=lb;
                        j=ub+1;
                        key=a[lb];
                        while(flag)
                        {
                                    i++;
                                    while(a[i]<key && i<ub)
                                    {
                                                i++;
                                    }
                                    j--;
                                    while(a[j]>key)
                                    {
                                                j--;
                                    }
                                    if(i<j)
                                    {
                                                temp=a[i];
                                                a[i]=a[j];
                                                a[j]=temp;
                                    }
                                    else
                                    {
                                                flag=0;
                                    }
                                    temp=a[lb];
                                    a[lb]=a[j];
                                    a[j]=temp;
                                    quick_sort(a,lb,j);;
                                    quick_sort(a,j+1,ub);
                        }
            }
end = clock();
total_time  =  ((double)(end - start)) / CLK_TCK;
printf(“Time : %f”,total_time);
}


Location: Mehsana, Gujarat, India

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