Program to Find the Greatest number

#include<stdio.h>
#include<conio.h>
void mian()
{
       int a,b,c;
       clrscr();
         printf("Enter the 3 values\n");
         scanf("%d%d%d",&a,&b,&c);

   if (a>b &&a>c)
{
     printf("Greatest is a=%d",a);
}
   else if (b>a && b>c)
{
     printf("Greatest is b=%d",b);
}
    else
{
     printf("Greatest is c=%d",c);
}
  getch();
}