Write a C program to sort integer values in descending order

//2063.2.a.Write a C program to sort integer values in descending order.
#include<stdio.h>
void main()
{
int a[20],i,j,t,n;
printf("enter the size of array:");
scanf("%d",&n);
printf("enter the element of integer\n");
for(i=0;i<n;i++)
{
scanf("%d",&a[i]);
}
printf("the integers in descending order is:\n");
for(i=0;i<n-1;i++)
{
for(j=i+1;j<n;j++)
{
if(a[i]<a[j])
{
t=a[i];
a[i]=a[j];
a[j]=t;

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