everest% ls
a.out*      buffer1.c   buffer1.s   buffer2.c   buffer2.s
everest% 

everest% cc buffer2.c
everest% 

everest% a.out
Segmentation fault (core dumped)
everest% 

everest% ls
a.out*      buffer1.s   buffer2.s   output
buffer1.c   buffer2.c   core
everest% 

everest% more output
everest%