Why and how does the following outputs involving the carriage return show up?

#include <stdio.h>

void main()
{
    printf("ab");
    printf("\bsi");
    printf("\rha");
}

this code gives the output of "ha" on GCC 4.8 compiler

#include <stdio.h>

void main()
{
    printf("ab");
    printf("\bsi");
    printf("\rha");
    printf("\n");
}

this code gives the output of "hai" on GCC 4.8 compiler

now the question is why does the output change from "ha" to "hai" just on adding the statement printf("\n"); at the end which (according to me) should not affect the code due to the preceding lines.