C Program to sort n numbers using Bubble Sort algorithm

#include<stdio.h>
#include<stdlib.h>


int *a,n;
void bubblesort();
void swap_w(int,int);


main()
{
int i,j;
printf("Enter the number of elements ");
scanf("%d",&n);
a=(int *)calloc(n,sizeof(int));
printf("Enter the elements\n");
for(i=0;i<n;i++)
scanf("%d",a+i);
bubblesort(0,n-1);
printf("The sorted sequence is\n");
for(i=0;i<n;i++)
printf("%d ",a[i]);
printf("\n");
return;
}


void bubblesort()
{
int i,j;
for(i=0;i<n-1;i++)
for(j=n-1;j>=i+1;j--)
if(a[j]<a[j-1])
swap_w(j,j-1);
}


void swap_w(int i,int j)
{
int temp;
temp=a[i];
a[i]=a[j];
a[j]=temp;
return;
}