cocktail shaker short

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

void cs_sort(int *,int);
void swap(int *,int *);
int main(void) {
    int n,lower,upper,i;
    clock_t start,end;
    double total;


    printf("Enter no. of elements:");
    scanf("%d",&n);
    printf("Enter the range:");
    scanf("%d %d",&lower,&upper);

    int *array=(int *)malloc(n*sizeof(int));

    srand((unsigned)time(NULL));
    for(i=0;i<n;i++)
        array[i]=lower+rand()%(upper-lower);

    start=clock();
    cs_sort(array,n);
    end=clock();

    total=(double)(end-start)/CLOCKS_PER_SEC;

    for(i=0;i<n;i++){
        printf("%d,",array[i]);
    }

    printf("\n\nTime taken for cocktail shaker sort: %lf",total);
    return 0;
}

void cs_sort(int *a,int n){
    int i,swapped=1,start,end;
    start=0;
    end=n-1;
    while(swapped){
        swapped=0;
        for(i=start;i<end;i++){
            if(a[i]>a[i+1]){
                swap(a+i,a+i+1);
                swapped++;
            }
        }


        if(!swapped)
            break;

        end--;
        for(i=end;i>=start;i--){
            if(a[i]>a[i+1]){
                swap(a+i,a+i+1);
                swapped++;
            }
        }
        start++;
    }

}

void swap(int *a,int *b){
    int temp;
    temp=*a;
    *a=*b;
    *b=temp;
}