Largest value using switch

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

void main()

{

clrscr();

int n1,n2;

printf("Enter a 1st Num:");

scanf("%d",&n1);

printf("Enter a 2nd Num:");

scanf("%d",&n2);

int r = n1>=n2

switch(r)
{
case 1:
{
if(n1==n2)
printf("Both numbers are equal");
else
printf("First number is greater");
break;
}
case 0:
printf("Second number is greater");

}

getch();

}