Greatest value between Three Numbers

#include <stdio.h>

#include <conio.h>

void main()

{

                int a,b,c;

                clrscr();

                printf("Enter the A number : ");

                scanf("%d",&a);

                printf("Enter the A number : ");

                scanf("%d",&b);

                printf("Enter the C number : ");

                scanf("%d",&c);

                if(a>b)

                {

                                if(a>c)

                                {

                                                printf("A is the greatest Number.");

                                }

                }

                else

                {

                                if(b>c)

                                {

                                                printf("B is the greatest Number.");

                                }

                                else

                                {

                                                printf("C is the greatest Number.");

                                }

                }

                getch();

}