Largest among three variable

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

void main()

{

clrscr();

int n1,n2;

printf("Enter 3 Nums:");

scanf("%d%d%d",&n1,&n2,&n3);

if(n1>n2&&n1>n3)                                                         

printf("1st number is greater");

else if(n2>n1&&n2>n3)

printf("2nd number is greater");

else
printf("3rd number is greater");

getch();

}