1st, 2nd and 3rd largest element in one dimension array

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

void main()
{
    int a[20],n,i,max=0,smax=0,tmax=0;  // declared the array a with size  20
    clrscr();

    printf("\n Enter  the number of elements for 1-D array : ");
    scanf("%d",&n);

    for(i=0;i<n;i++)
    {
printf("\n Enter element [%d] : ",i+1);
scanf("%d",&a[i]);
    }
    for(i=0;i<n;i++)
    {
if(max<a[i])
   max=a[i];
    }

    printf("\n Greatest element from above array inserted is : %d",max);

    for(i=0;i<n;i++)
    {   if(smax<a[i]&&a[i]<max)
smax=a[i];
    }

    printf("\n2nd Greatest element from above array inserted is : %d",smax);
    for(i=0;i<n;i++)
    {   if(tmax<a[i]&&a[i]<smax &&a[i]<max)
tmax=a[i];
    }

    printf("\n3rd Greatest element from above array inserted is : %d",tmax);

    getch();

 
}